Author: "Kampczyk P." / Topic: astrophysics::galaxy astrophysics - Searchworks@Jio Institute Digital Library Search Results

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1. The zCOSMOS survey

Author: Zucca E., Bardelli S., Bolzonella M., Zamorani G., Ilbert O., Pozzetti L., Mignoli M., Kova, #269, Lilly S., Tresse L., Tasca L., Cassata P., Halliday C., Vergani D., Caputi K., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Mainieri V., Renzini A., Scodeggio M., Bongiorno A., Coppa G., de La Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Pellò R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Abbas U., Bottini D., Cappi A., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Meme, P., Meneux B., Oesch P., Porciani C., Scaramella R., Arnouts S., Aussel H., Capak P., Kartaltepe J., Salvato M., Sanders D., Scoville N., Taniguchi Y., Thompson D., CUCCIATI, OLGA, CIMATTI, ANDREA, MORESCO, MICHELE ENNIO MARIA, INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astronomico di Bologna (OABO), Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), AUTRES, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Arcetri (OAA), University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), INAF- Milano, Dipartimento di Fisica, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Tokai University, Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Space Telescope Science Institute (STSci), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Materials & Process technology, Boeing Company [Chicago], California Institute of Technology (CALTECH), Sea Mammal Research Unit, St Andrews, Astronomy, Zucca E., Bardelli S., Bolzonella M., Zamorani G., Ilbert O., Pozzetti L., Mignoli M., Kova&#269, K., Lilly S., Tresse L., Tasca L., Cassata P., Halliday C., Vergani D., Caputi K., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Scodeggio M., Bongiorno A., Coppa G., Cucciati O., de La Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Pellò R., Peng Y., Perez-Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Abbas U., Bottini D., Cappi A., Cimatti A., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Meme, P., Meneux B., Moresco M., Oesch P., Porciani C., Scaramella R., Arnouts S., Aussel H., Capak P., Kartaltepe J., Salvato M., Sanders D., Scoville N., Taniguchi Y., Thompson D., Università di Bologna, Dipartimento di Astronomia, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Normalization (statistics), Cosmology and Nongalactic Astrophysics (astro-ph.CO), High density, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Surveys, 01 natural sciences, Luminosity, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], MORPHOLOGICAL CLASSIFICATION, 1ST EPOCH DATA, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Density field, FIELD, 10. No inequality, 010303 astronomy & astrophysics, PHOTOMETRIC REDSHIFTS, Astrophysics::Galaxy Astrophysics, galaxies: statistics, Luminosity function (astronomy), Physics, REDSHIFT SURVEY, LEGACY SURVEY, 010308 nuclear & particles physics, Galaxies: evolution, Galaxies: luminosity function, mass function, Galaxies: statistics, Astronomy and Astrophysics, Space and Planetary Science, VLT DEEP SURVEY, B band, Galaxy, galaxies: luminosity function, mass function, COLOR-DENSITY RELATION, galaxies: luminosity function, mass function, DIGITAL SKY SURVEY, galaxies: evolution, Cosmic time, SURVEY COSMOS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: (Abridged) We studied the evolution in the B band luminosity function to z~1 in the zCOSMOS 10k sample, for which both accurate galaxy classifications and a detailed description of the local density field are available. The global LF exhibits a brightening of ~0.7 mag in M* from z~0.2 to z~0.9. At low z, late types dominate at faint magnitudes, while the bright end is populated mainly by early types. At higher z, late-type galaxies evolve significantly and, at z~1, the contribution from the various types to the bright end of the LF is comparable. The evolution for early types is in both luminosity and normalization. A similar behaviour is exhibited by late types, but with an opposite trend for the normalization. Studying the role of the environment, we find that the global LF of galaxies in overdense regions has always a brighter M* and a flatter slope. In low density environments, the main contribution to the LF is from blue galaxies, while for high density environments there is an important contribution from red galaxies to the bright end. The differences between the global LF in the two environments are not due to only a difference in the relative numbers of red and blue galaxies, but also to their relative luminosity distributions: the value of M* for both types in underdense regions is always fainter than in overdense environments. The "specular" evolution of late- and early-type galaxies is consistent with a scenario where a part of blue galaxies is transformed in red galaxies with increasing cosmic time, without significant changes in the fraction of intermediate-type galaxies. The bulk of this tranformation in overdense regions probably happened before z~1, while it is still ongoing at lower z in underdense environments., Comment: 18 pages, 10 figures, A&A in press
Published: 2009
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2. Extreme emission-line galaxies out to z similar to 1 in zCOSMOS I. Sample and characterization of global properties

Author: Amorin, R., Perez-Montero, F., Contini, T., Vilchez, J. M., Bolzonella, M., Tasca, L. A. M., Lamareille, F., Zamorani, G., Maier, C., Carollo, C. M., Kneib, J. -P., Le Fevre, O., Lilly, S., Mainieri, V., Renzinis, A., Scodeggio, M., Bardelli, S., Bongiorno, A., Caputi, K., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Kovac, K., Le Borgne, J. -F., Le Brun, V., Mignoli, M., Pello, R., Peng, Y., Presotto, V., Ricciardelli, E., Silverman, J. D., Tanaka, M., Tresse, L., Vergani, D., Zucca, E., and Kapteyn Astronomical Institute
Subjects: ACTIVE GALACTIC NUCLEI, galaxies: irregular galaxies: star formation, ULTRA DEEP FIELD, METAL-POOR GALAXIES, galaxies: fundamental parameters, galaxies: starburst, Astrophysics::Cosmology and Extragalactic Astrophysics, LYMAN BREAK GALAXIES, LY-ALPHA EMITTERS, LUMINOSITY-METALLICITY RELATION, COMPACT DWARF GALAXIES, STAR-FORMING GALAXIES, Astrophysics::Solar and Stellar Astrophysics, DIGITAL SKY SURVEY, galaxies: abundances, Astrophysics::Earth and Planetary Astrophysics, GREEN PEA GALAXIES, galaxies: evolution, Astrophysics::Galaxy Astrophysics
Abstract: Context. The study of large and representative samples of low-metallicity star-forming galaxies at different cosmic epochs is of great interest to the detailed understanding of the assembly history and evolution of low-mass galaxies. Aims. We present a thorough characterization of a large sample of 183 extreme emission-line galaxies (EELGs) at redshift 0.11 Methods. We use multiwavelength COSMOS photometry, HST-ACS I-band imaging, and optical zCOSMOS spectroscopy to derive the main global properties of star-forming EELGs, such as sizes, stellar masses, star formation rates (SFR), and reliable oxygen abundances using both "direct" and "strong-line" methods. Results. The EELGs are extremely compact (r(50) similar to 1.3 kpc), low-mass (M-* similar to 10(7)-10(10) M-circle dot) galaxies forming stars at unusually high specific star formation rates (sSFR equivalent to SFR/M-star up to 10(-7) yr(-1)) compared to main sequence star-forming galaxies of the same stellar mass and redshift. At rest-frame UV wavelengths, the EELGs are luminous and show high surface brightness and include strong Ly alpha emitters, as revealed by GALEX spectroscopy. We show that zCOSMOS EELGs are high-ionization, low-metallicity systems, with median 12+log(O/H) = 8.16 +/- 0.21 (0.2 Z(circle dot)) including a handful of extremely metal-deficient ( Conclusions. The zCOSMOS EELGs are galaxies caught in a transient and probably early period of their evolution, where they are efficiently building up a significant fraction of their present-day stellar mass in an ongoing, galaxy-wide starburst. Therefore, the EELGs constitute an ideal benchmark for comparison studies between low- and high-redshift low-mass star-forming galaxies.
Published: 2015

3. Accreting supermassive black holes in the COSMOS Field and the connection to their host galaxies

Author: Bongiorno A., Merloni A., Magnelli B., Salvato M., Mignoli M., Zamorani G., Fiore F., Rosario D., Mainieri V., Comastri A., Balestra I., Bardelli S., Berta S., Civano F., Kampczyk P., Le Floc'h E., Lutz D., Pozzetti L., Riguccini L., Shankar F., Silverman J., BRUSA, MARCELLA, VIGNALI, CRISTIAN, LUSSO, ELISABETA, POZZI, FRANCESCA, Bongiorno A., Merloni A., Brusa M., Magnelli B., Salvato M., Mignoli M., Zamorani G., Fiore F., Rosario D., Mainieri V., Comastri A., Vignali C., Balestra I., Bardelli S., Berta S., Civano F., Kampczyk P., Le Floc'h E., Lusso E., Lutz D., Pozzetti L., Pozzi F., Riguccini L., Shankar F., and Silverman J.
Subjects: Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, survey, galaxies: fundamental parameters, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, galaxies: evolution, Astrophysics::Galaxy Astrophysics
Abstract: Using the wide multiband photometry available in the Cosmic Evolution Survey (COSMOS) field, we explore the host galaxy properties of a large sample of active galactic nuclei (AGNs; ˜1700 objects) with Lbol ranging from 1043 to 1047 erg s-1, obtained by combining X-ray and optical spectroscopic selections. Based on a careful study of their spectral energy distributions, which have been parametrized using a two-component (AGN+galaxy) model fit, we have derived dust-corrected rest-frame magnitudes, colours and stellar masses of the obscured and unobscured AGN hosts up to high redshift (z≲3). Moreover, for the sample of obscured AGNs, we have also derived reliable star formation rates (SFRs). We find that AGN hosts span a large range of stellar masses and SFRs. No colour-bimodality is seen at any redshift in the AGN hosts, which are found to be mainly massive, red galaxies. Once we have accounted for the colour-mass degeneracy in well-defined mass-matched samples, we find a residual (marginal) enhancement of the incidence of AGNs in redder galaxies with lower specific SFRs. We argue that this result might emerge because of our ability to properly account for AGN light contamination and dust extinction, compared to surveys with a more limited multiwavelength coverage. However, because these colour shifts are relatively small, systematic effects could still be considered responsible for some of the observed trends. Interestingly, we find that the probability for a galaxy to host a black hole that is growing at any given 'specific accretion rate' (i.e. the ratio of X-ray luminosity to the host stellar mass) is almost independent of the host galaxy mass, while it decreases as a power law with LX/M*. By analysing the normalization of such a probability distribution, we show how the incidence of AGNs increases with redshift as rapidly as (1 + z)4, which closely resembles the overall evolution of the specific SFR of the entire galaxy population. We provide analytical fitting formulae that describe the probability of a galaxy of any mass (above the completeness limit of the COSMOS) to host an AGN of any given specific accretion rate as a function of redshift. These can be useful tools for theoretical studies of the growing population of black holes within galaxy evolution models. Although AGN activity and star formation in galaxies do appear to have a common triggering mechanism, at least in a statistical sense, within the COSMOS sample, we do not find any conclusive evidence to suggest that AGNs have a powerful influence on the star-forming properties of their host galaxies.
Published: 2012

4. The Nonlinear Biasing of the zCOSMOS Galaxies up to z ~ 1 from the 10k Sample

Author: Kova, #269, Porciani C., Lilly S. J., Marinoni C., Guzzo L., Zamorani G., Iovino A., Oesch P., Bolzonella M., Peng Y., Meneux B., Zucca E., Bardelli S., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Mainieri V., Renzini A., Scodeggio M., Bongiorno A., Caputi K., Coppa G., de la Torre S., de Ravel L., Finoguenov A., Franzetti P., Garilli B., Kampczyk P., Knobel C., Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Mignoli M., Pello R., Perez Montero E., Pozzetti L., Ricciardelli E., Silverman J. D., Tanaka M., Tasca L. A. M., Tresse L., Vergani D., Abbas U., Bottini D., Cappi A., Cassata P., Fumana M., Koekemoer A. M., Leauthaud A., Maccagni D., McCracken H. J., Memeo P., Scaramella R., Scoville N. Z., CUCCIATI, OLGA, CIMATTI, ANDREA, Kova&#269, K., Porciani C., Lilly S. J., Marinoni C., Guzzo L., Cucciati O., Zamorani G., Iovino A., Oesch P., Bolzonella M., Peng Y., Meneux B., Zucca E., Bardelli S., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Scodeggio M., Bongiorno A., Caputi K., Coppa G., de la Torre S., de Ravel L., Finoguenov A., Franzetti P., Garilli B., Kampczyk P., Knobel C., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R., Perez-Montero E., Pozzetti L., Ricciardelli E., Silverman J. D., Tanaka M., Tasca L. A. M., Tresse L., Vergani D., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Fumana M., Koekemoer A. M., Leauthaud A., Maccagni D., McCracken H. J., Memeo P., Scaramella R., and Scoville N. Z.
Subjects: Physics, cosmology: observation, Field (physics), 010308 nuclear & particles physics, Dark matter, Astronomy and Astrophysics, Biasing, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Redshift, Galaxy, Luminosity, Space and Planetary Science, cosmology: observations, 0103 physical sciences, Halo effect, galaxies: evolution, galaxies: statistics, 010303 astronomy & astrophysics, Smoothing, Astrophysics::Galaxy Astrophysics
Abstract: We use the zCOSMOS galaxy overdensity field to study the biasing of galaxies in the COSMOS field. By comparing the probability distribution function of the galaxy density contrast δ g to the lognormal approximation of the mass density contrast δ, we obtain the mean biasing function b(δ, z, R) between the galaxy and matter overdensity fields and its second moments \hat{b} and \tilde{b}. Over the redshift interval 0.4 < z < 1 the conditional mean function langδ g |δrang = b(δ, z, R)δ is of a characteristic shape, requiring nonlinear biasing in the most overdense and underdense regions. Taking into account the uncertainties due to cosmic variance, we do not detect any significant evolution in the langδ g |δrang function, but we do detect a significant redshift evolution in the linear biasing parameter \hat{b} from 1.23 ± 0.11 at z ~ 0.55 to 1.62 ± 0.14 at z ~ 0.75, for a luminosity-complete sample of MB < -20 - z galaxies. The \hat{b} parameter does not change significantly with smoothing scale between 8 and 12 h -1 Mpc, but increases systematically with luminosity (at 2σ-3σ significance between the MB < -20.5 - z and MB < -20 - z samples). The nonlinearity parameter \tilde{b}/ \hat{b} is offset from unity by at most 2%, with an uncertainty of the same order. The \tilde{b}/\hat{b} parameter does not show any significant redshift evolution, dependence on the smoothing scale or on the luminosity. By matching the linear bias of galaxies to the halo bias, we infer that the MB < -20 - z galaxies reside in dark matter halos with a characteristic mass of about (2.6 - 5.6) × 1012 M sun with a small dependence on the adopted bias-mass relation. Our detailed error analysis and comparison with previous studies lead us to conclude that cosmic variance is the main contributor to the differences in the linear bias measured from different surveys. While our results support the general picture of biased galaxy formation up to z ~ 1, the fine-tuning of the galaxy formation models is still limited by the restrictions of the current spectroscopic surveys at these redshifts.
Published: 2011

5. The zCOSMOS-Bright survey: the clustering of early and late galaxy morphological types since z≃ 1

Author: de la Torre S., Le Fèvre O., Porciani C., Guzzo L., Meneux B., Abbas U., Tasca L., Carollo C. M., Contini T., Kneib J. P., Lilly S. J., Mainieri V., Renzini A., Scodeggio M., Zamorani G., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., de Ravel L., Franzetti P., Garilli B., Halliday C., Iovino A., Kampczyk P., Knobel C., Koekemoer A. M., Kova, #269, Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Mignoli M., Pelló R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J., Tanaka M., Tresse L., Vergani D., Zucca E., Bottini D., Cappi A., Cassata P., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Oesch P., Pozzetti L., Scaramella R., CUCCIATI, OLGA, CIMATTI, ANDREA, de la Torre S., Le Fèvre O., Porciani C., Guzzo L., Meneux B., Abbas U., Tasca L., Carollo C. M., Contini T., Kneib J.-P., Lilly S. J., Mainieri V., Renzini A., Scodeggio M., Zamorani G., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., Cucciati O., de Ravel L., Franzetti P., Garilli B., Halliday C., Iovino A., Kampczyk P., Knobel C., Koekemoer A. M., Kova&#269, K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pelló R., Peng Y., Perez-Montero E., Ricciardelli E., Silverman J., Tanaka M., Tresse L., Vergani D., Zucca E., Bottini D., Cappi A., Cassata P., Cimatti A., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Oesch P., Pozzetti L., and Scaramella R.
Subjects: cosmology: observation, galaxies: high-redshift, galaxies: statistic, Astrophysics::Cosmology and Extragalactic Astrophysics, large-scale structure of Universe, galaxies: evolution, Astrophysics::Galaxy Astrophysics
Abstract: We measure the spatial clustering of galaxies as a function of their morphological type at z≃ 0.8, for the first time in a deep redshift survey with full morphological information. This is obtained by combining high-resolution Hubble Space Telescope imaging and Very Large Telescope spectroscopy for about 8500 galaxies to ? with accurate spectroscopic redshifts from the zCOSMOS-Bright redshift survey. At this epoch, early-type galaxies already show a significantly stronger clustering than late-type galaxies on all probed scales. A comparison to the Sloan Digital Sky Survey Data at z≃ 0.1 shows that the relative clustering strength between early and late morphological classes tends to increase with cosmic time at small separations, while on large scales it shows no significant evolution since z≃ 0.8. This suggests that most early-type galaxies had already formed in intermediate and dense environments at this epoch. Our results are consistent with a picture in which the relative clustering of different morphological types between z≃ 1 and 0 reflects the evolving role of environment in the morphological transformation of galaxies, on top of a global evolution driven by mass.
Published: 2011

6. The evolution of quiescent galaxies at high redshifts (z≥ 1.4)

Author: Domínguez Sánchez H., Gruppioni C., Ilbert O., Pozzetti L., McCracken H., Capak P., Le Floch E., Salvato M., Zamorani G., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Lilly S. J., Mainieri V., Renzini A., Scodeggio M., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Kova, #269, Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Mignoli M., Pelló R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Tasca L. A. M., Tresse L., Vergani D., Zucca E., POZZI, FRANCESCA, CIMATTI, ANDREA, CUCCIATI, OLGA, Domínguez Sánchez H., Pozzi F., Gruppioni C., Cimatti A., Ilbert O., Pozzetti L., McCracken H., Capak P., Le Floch E., Salvato M., Zamorani G., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Lilly S. J., Mainieri V., Renzini A., Scodeggio M., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Kova&#269, K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pelló R., Peng Y., Perez-Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Tasca L. A. M., Tresse L., Vergani D., and Zucca E.
Subjects: galaxies: high-redshift, galaxies: star formation, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, galaxies: evolution, Astrophysics::Galaxy Astrophysics
Abstract: The goal of this work is to study the evolution of high-redshift (z≥ 1.4) quiescent galaxies over an effective area of ˜1.7 deg2 in the COSMOS field. Galaxies have been divided according to their star formation activity and the evolution of the different populations, in particular of the quiescent galaxies, has been investigated in detail. We have studied an IRAC (mag 3.6 μm < 22.0) selected sample of ˜18 000 galaxies at z≥ 1.4 in the COSMOS field with multiwavelength coverage extending from the U band to the Spitzer 24 μm one. We have derived accurate photometric redshifts (?) through a SED-fitting procedure. Other important physical parameters [masses, ages and star formation rates (SFR)] of the galaxies have been obtained using Maraston models. We have divided our sample into actively star-forming, intermediate and quiescent galaxies depending on their specific star formation rate (SSFR = SFR/M). We have computed the galaxy stellar mass function (GSMF) of the total sample and the different populations at z= 1.4-3.0. We have studied the properties of high-redshift quiescent galaxies finding that they are old (1-4 Gyr), massive (˜ 1010.65 M⊙), weakly star-forming stellar populations with low dust extinction [E(B-V) ≤ 0.15] and small e-folding time-scales (τ˜ 0.1-0.3 Gyr). We observe a significant evolution of the quiescent stellar mass function from 2.5 < z < 3.0 to 1.4 < z < 1.6, increasing by ˜1 dex in this redshift interval. We find that z˜ 1.5 is an epoch of transition of the GSMF: while the GSMF at z≳ 1.5 is dominated by the star-forming galaxies at all stellar masses, at z≲ 1.5 the contribution to the total GSMF of the quiescent galaxies is significant and becomes higher than that of the star-forming population for M≥ 1010.75 M⊙. The fraction of star-forming galaxies decreases from 60-20 per cent from z˜ 2.5-3.0 to 1.4-1.6 for M˜ 1011.0 M⊙, while the quiescent population increases from 10-50 per cent at the same redshift and mass intervals. We compare the fraction of quiescent galaxies derived with that predicted by theoretical models and find that the Kitzbichler & White model, implemented on the Millennium Simulation, is the one that better reproduces the shape of the data. Finally, we calculate the stellar mass density of the star-forming and quiescent populations as a function of redshift and find that there is already a significant number of quiescent galaxies at z > 2.5 (logρ[M⊙ Mpc-3]˜ 6), meaning that efficient star formation had to take place before that time.
Published: 2011

7. The bimodality of the 10k zCOSMOS-bright galaxies up to z ~ 1: a new statistical and portable classification based on the optical galaxy properties

Author: Coppa G., Mignoli M., Zamorani G., Bardelli S., Lilly S. J., Bolzonella M., Scodeggio M., Vergani D., Nair P., Pozzetti L., Zucca E., Carollo C. M., Contini T., Le Fèvre O., Renzini A., Mainieri V., Bongiorno A., Caputi K. I., de la Torre S., de Ravel L., Franzetti P., Garilli B., Memeo P., Iovino A., Kampczyk P., Kneib J. P., Knobel C., Koekemoer A. M., Kova, #269, Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Pellò R., Peng Y., Perez Montero E., Ricciardelli E., Scarlata C., Silverman J. D., Tanaka M., Tasca L., Tresse L., Abbas U., Bottini D., Capak P., Cappi A., Cassata P., Fumana M., Guzzo L., Leauthaud A., Maccagni D., Marinoni C., Meneux B., Oesch P., Porciani C., Scaramella R., Scoville N., CIMATTI, ANDREA, CUCCIATI, OLGA, Coppa G., Mignoli M., Zamorani G., Bardelli S., Lilly S. J., Bolzonella M., Scodeggio M., Vergani D., Nair P., Pozzetti L., Cimatti A., Zucca E., Carollo C. M., Contini T., Le Fèvre O., Renzini A., Mainieri V., Bongiorno A., Caputi K. I., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Memeo P., Iovino A., Kampczyk P., Kneib J.-P., Knobel C., Koekemoer A. M., Kova&#269, K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Pellò R., Peng Y., Perez-Montero E., Ricciardelli E., Scarlata C., Silverman J. D., Tanaka M., Tasca L., Tresse L., Abbas U., Bottini D., Capak P., Cappi A., Cassata P., Fumana M., Guzzo L., Leauthaud A., Maccagni D., Marinoni C., Meneux B., Oesch P., Porciani C., Scaramella R., Scoville N., Institute for Astronomy [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astronomico di Bologna (OABO), University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), European Southern Observatory (ESO), College of Computing (GATECH), Georgia Institute of Technology [Atlanta], AUTRES, Dipartimento di Fisica, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Département Informatique pour les Systèmes Coopératifs Ouverts et Décentralisés (ISCOD-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Henri Fayol, Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Hunan Normal University, Spitzer Science Center, California Institute of Technology (CALTECH), Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Astronomy, Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Hunan Normal University (HNU), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), and Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, STAR-FORMATION, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], MORPHOLOGICAL CLASSIFICATION, 0103 physical sciences, Range (statistics), PHOTOMETRIC REDSHIFTS, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Galaxies: evolution, Galaxies: fundamental parameters, Galaxies: general, Astronomy and Astrophysics, Space and Planetary Science, DIGITAL-SKY-SURVEY, 010308 nuclear & particles physics, FORMATION HISTORIES, HUBBLE DEEP FIELD, Order (ring theory), galaxies: fundamental parameters, ENVIRONMENTAL DEPENDENCE, Redshift survey, galaxies: general, Redshift, Galaxy, Bimodality, LUMINOSITY FUNCTION, SPECTROSCOPIC SAMPLE, STELLAR MASS FUNCTION, Cube, galaxies: evolution, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Our goal is to develop a new and reliable statistical method to classify galaxies from large surveys. We probe the reliability of the method by comparing it with a three-dimensional classification cube, using the same set of spectral, photometric and morphological parameters.We applied two different methods of classification to a sample of galaxies extracted from the zCOSMOS redshift survey, in the redshift range 0.5 < z < 1.3. The first method is the combination of three independent classification schemes, while the second method exploits an entirely new approach based on statistical analyses like Principal Component Analysis (PCA) and Unsupervised Fuzzy Partition (UFP) clustering method. The PCA+UFP method has been applied also to a lower redshift sample (z < 0.5), exploiting the same set of data but the spectral ones, replaced by the equivalent width of H$��$. The comparison between the two methods shows fairly good agreement on the definition on the two main clusters, the early-type and the late-type galaxies ones. Our PCA-UFP method of classification is robust, flexible and capable of identifying the two main populations of galaxies as well as the intermediate population. The intermediate galaxy population shows many of the properties of the green valley galaxies, and constitutes a more coherent and homogeneous population. The fairly large redshift range of the studied sample allows us to behold the downsizing effect: galaxies with masses of the order of $3\cdot 10^{10}$ Msun mainly are found in transition from the late type to the early type group at $z>0.5$, while galaxies with lower masses - of the order of $10^{10}$ Msun - are in transition at later epochs; galaxies with $M 5\cdot 10^{10}$ Msun) mostly completed their transition before $z\sim 1$., 16 pages, 14 figures, accepted for publication in A&A
Published: 2010
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8. The XMM-Newton Wide-Field Survey in the COSMOS field (XMM-COSMOS): demography and multiwavelength properties of obscured and unobscured luminous AGN

Author: BRUSA, MARCELLA, LUSSO, ELISABETA, VIGNALI, CRISTIAN, Civano F., Comastri A., Miyaji T., Salvato M., Zamorani G., Cappelluti N., Fiore F., Hasinger G., Mainieri V., Merloni A., Bongiorno A., Capak P., Elvis M., Gilli R., Hao H., Jahnke K., Koekemoer A. M., Ilbert O., Le Floc'h E., Mignoli M., Schinnerer E., Silverman J. D., Treister E., Trump J. D., Zamojski M., Aldcroft T., Aussel H., Bardelli S., Bolzonella M., Cappi A., Caputi K., Contini T., Finoguenov A., Fruscione A., Garilli B., Impey C. D., Iovino A., Iwasawa K., Kampczyk P., Kartaltepe J., Kneib J. P., Knobel C., Kovac K., Lamareille F., Leborgne J. F., Le Brun V., Le Fevre O., Lilly S. J., Maier C., McCracken H. J., Pello R., Peng Y. J, Perez Montero E., de Ravel L., Sanders D., Scodeggio M., Scoville N. Z., Tanaka M., Taniguchi Y., Tasca L., de la Torre S., Tresse L., Vergani D., Zucca E., Brusa M., Civano F., Comastri A., Miyaji T., Salvato M., Zamorani G., Cappelluti N., Fiore F., Hasinger G., Mainieri V., Merloni A., Bongiorno A., Capak P., Elvis M., Gilli R., Hao H., Jahnke K., Koekemoer A. M., Ilbert O., Le Floc'h E., Lusso E., Mignoli M., Schinnerer E., Silverman J. D., Treister E., Trump J. D., Vignali C., Zamojski M., Aldcroft T., Aussel H., Bardelli S., Bolzonella M., Cappi A., Caputi K., Contini T., Finoguenov A., Fruscione A., Garilli B., Impey C. D., Iovino A., Iwasawa K., Kampczyk P., Kartaltepe J., Kneib J. P., Knobel C., Kovac K., Lamareille F., Leborgne J.-F., Le Brun V., Le Fevre O., Lilly S. J., Maier C., McCracken H. J., Pello R., Peng Y-J, Perez-Montero E., de Ravel L., Sanders D., Scodeggio M., Scoville N. Z., Tanaka M., Taniguchi Y., Tasca L., de la Torre S., Tresse L., Vergani D., and Zucca E.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, galaxies: active – surveys – X-rays: diffuse background – X-rays: galaxies – X-rays: general, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We report the final optical identifications of the medium-depth (~60 ksec), contiguous (2 deg^2) XMM-Newton survey of the COSMOS field. XMM-Newton has detected ~800 X-ray sources down to limiting fluxes of ~5x10^{-16}, ~3x10^{-15}, and ~7x10^{-15} erg/cm2/s in the 0.5-2 keV, 2-10 keV and 5-10 keV bands, respectively. The work is complemented by an extensive collection of multi-wavelength data from 24 micron to UV, available from the COSMOS survey, for each of the X-ray sources, including spectroscopic redshifts for ~50% of the sample, and high-quality photometric redshifts for the rest. The XMM and multiwavelength flux limits are well matched: 1760 (98%) of the X-ray sources have optical counterparts, 1711 (~95%) have IRAC counterparts, and 1394 (~78%) have MIPS 24micron detections. Thanks to the redshift completeness (almost 100%) we were able to constrain the high-luminosity tail of the X-ray luminosity function confirming that the peak of the number density of logL_X>44.5 AGN is at z~2. Spectroscopically-identified obscured and unobscured AGN, as well as normal and starforming galaxies, present well-defined optical and infrared properties. We devised a robust method to identify a sample of ~150 high redshift (z>1), obscured AGN candidates for which optical spectroscopy is not available. We were able to determine that the fraction of the obscured AGN population at the highest (L_X>10^{44} erg s^{-1}) X-ray luminosity is ~15-30% when selection effects are taken into account, providing an important observational constraint for X-ray background synthesis. We studied in detail the optical spectrum and the overall spectral energy distribution of a prototypical Type 2 QSO, caught in a stage transitioning from being starburst dominated to AGN dominated, which was possible to isolate only thanks to the combination of X-ray and infrared observations., ApJ, in press. 59 pages, 14 figures, 2 Tables. A few typos corrected and a reference added. Table 2 is also available at http://www.mpe.mpg.de/XMMCosmos/xmm53_release ; a version of the paper in ApJ format (27 pages) is available at http://www.mpe.mpg.de/XMMCosmos/xmm53_release/brusa_xmmcosmos_optid.pdf
Published: 2010
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9. The [O iii] emission line luminosity function of optically selected type-2 AGN from zCOSMOS

Author: Bongiorno A., Mignoli M., Zamorani G., Lamareille F., LANZUISI, GIORGIO, Miyaji T., Bolzonella M., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Lilly S. J., Mainieri V., Renzini A., Scodeggio M., Bardelli S., Caputi K., Civano F., Coppa G., de La Torre S., de Ravel L., Franzetti P., Garilli B., Halliday C., Hasinger G., Koekemoer A. M., Iovino A., Kampczyk P., Knobel C., Kova, #269, Le Borgne J. F., Le Brun V., Maier C., Merloni A., Nair P., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Salvato M., Silverman J., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Guzzo L., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Pozzetti L., Scaramella R., BRUSA, MARCELLA, CUCCIATI, OLGA, CIMATTI, ANDREA, Bongiorno A., Mignoli M., Zamorani G., Lamareille F., Lanzuisi G., Miyaji T., Bolzonella M., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Lilly S. J., Mainieri V., Renzini A., Scodeggio M., Bardelli S., Brusa M., Caputi K., Civano F., Coppa G., Cucciati O., de La Torre S., de Ravel L., Franzetti P., Garilli B., Halliday C., Hasinger G., Koekemoer A. M., Iovino A., Kampczyk P., Knobel C., Kova&#269, K., Le Borgne J.-F., Le Brun V., Maier C., Merloni A., Nair P., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Salvato M., Silverman J., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Guzzo L., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Pozzetti L., Scaramella R., Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), and Astronomy
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010504 meteorology & atmospheric sciences, Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Type (model theory), Surveys, 01 natural sciences, Luminosity, 0103 physical sciences, Galaxies: active, Astronomy and Astrophysics, Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, Emission spectrum, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Density evolution, 0105 earth and related environmental sciences, Line (formation), Luminosity function (astronomy), Physics, education.field_of_study, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Redshift, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present a catalog of 213 type-2 AGN selected from the zCOSMOS survey. The selected sample covers a wide redshift range (0.15, Comment: 20 pages, 11 figures, accepted for publication in Astronomy and Astrophysics
Published: 2010
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10. Tracking the impact of environment on the galaxy stellar mass function up to z â¼ 1 in the 10 k zCOSMOS sample

Author: Bolzonella M., Kova, #269, Pozzetti L., Zucca E., Lilly S. J., Peng Y., Iovino A., Zamorani G., Vergani D., Tasca L. A. M., Lamareille F., Oesch P., Caputi K., Kampczyk P., Bardelli S., Maier C., Abbas U., Knobel C., Scodeggio M., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Mainieri V., Renzini A., Bongiorno A., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Le Borgne J. F., Le Brun V., Mignoli M., Pelló R., Perez Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Tresse L., Bottini D., Cappi A., Cassata P., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Porciani C., Scaramella R., Aussel H., Capak P., Halliday C., Ilbert O., Kartaltepe J., Salvato M., Sanders D., Scarlata C., Scoville N., Taniguchi Y., Thompson D., CUCCIATI, OLGA, CIMATTI, ANDREA, Bolzonella M., Kova&#269, K., Pozzetti L., Zucca E., Cucciati O., Lilly S. J., Peng Y., Iovino A., Zamorani G., Vergani D., Tasca L. A. M., Lamareille F., Oesch P., Caputi K., Kampczyk P., Bardelli S., Maier C., Abbas U., Knobel C., Scodeggio M., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Bongiorno A., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Le Borgne J.-F., Le Brun V., Mignoli M., Pelló R., Perez-Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Tresse L., Bottini D., Cappi A., Cassata P., Cimatti A., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Porciani C., Scaramella R., Aussel H., Capak P., Halliday C., Ilbert O., Kartaltepe J., Salvato M., Sanders D., Scarlata C., Scoville N., Taniguchi Y., Thompson D., INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), AUTRES, INAF- Milano, Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), INAF - Osservatorio Astronomico di Brera (OAB), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Human Genetics Center, The University of Texas Health Science Center at Houston (UTHealth), School of Biotechnology and Biomolecular Sciences, University of New South Wales [Sydney] (UNSW), Space Telescope Science Institute (STSci), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), California Institute of Technology (CALTECH), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Materials & Process technology, Boeing Company [Chicago], Sea Mammal Research Unit, St Andrews, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Photometry (optics), [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Galaxy formation and evolution, Density contrast, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Star formation, galaxies: fundamental parameters, Astronomy and Astrophysics, Redshift, Galaxy, Bimodality, galaxies: luminosity function, mass function, Space and Planetary Science, cosmology: observations, galaxies: evolution, galaxies: luminosity function, mass function, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We study the impact of the environment on the evolution of galaxies in the zCOSMOS 10k sample in the redshift range 0.1, Comment: 17 pages, 11 figures. Version accepted for publication in Astronomy and Astrophysics, including referee's suggestions, a new section with comparison with literature data, and updated references
Published: 2010
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11. The Density Field of the 10k zCOSMOS Galaxies

Author: Kova, #269, Lilly S. J., Porciani C., Iovino A., Zamorani G., Oesch P., Bolzonella M., Knobel C., Finoguenov A., Peng Y., Carollo C. M., Pozzetti L., Caputi K., Silverman J. D., Tasca L. A. M., Scodeggio M., Vergani D., Scoville N. Z., Capak P., Contini T., Kneib J. P., Le Fèvre O., Mainieri V., Renzini A., Bardelli S., Bongiorno A., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Guzzo L., Kampczyk P., Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Mignoli M., Pello R., Perez Montero E., Ricciardelli E., Tanaka M., Tresse L., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Fumana M., Koekemoer A. M., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Scaramella R., CUCCIATI, OLGA, CIMATTI, ANDREA, Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Kova&#269, K., Lilly S. J., Cucciati O., Porciani C., Iovino A., Zamorani G., Oesch P., Bolzonella M., Knobel C., Finoguenov A., Peng Y., Carollo C. M., Pozzetti L.,Caputi K., Silverman J. D., Tasca L. A. M., Scodeggio M., Vergani D., Scoville N. Z., Capak P., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Bardelli S., Bongiorno A., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Guzzo L., Kampczyk P., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R., Perez Montero E., Ricciardelli E., Tanaka M., Tresse L., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Fumana M., Koekemoer A. M., Maccagni D., Marinoni C., McCracken H. J.,Memeo P., Meneux B., Scaramella R., Astronomy, and Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Field (physics), FOS: Physical sciences, Scale (descriptive set theory), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Spectral line, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], LY-ALPHA EMITTERS, surveys, galaxies: high-redshift, 0103 physical sciences, LARGE-SCALE STRUCTURE, 010303 astronomy & astrophysics, Weak gravitational lensing, Astrophysics::Galaxy Astrophysics, Photometric redshift, Physics, large-scale structure of universe, REDSHIFT SURVEY, 010308 nuclear & particles physics, Shot noise, Astronomy and Astrophysics, VLT DEEP SURVEY, ENVIRONMENTAL DEPENDENCE, Galaxy, Redshift, COSMOS FIELD, Space and Planetary Science, Galaxies: high-redshift, Large-scale structure of universe, Surveys, SMOOTHED PARTICLE HYDRODYNAMICS, LUMINOSITY DEPENDENCE, DIGITAL SKY SURVEY, STELLAR MASS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We use the current sample of ~10,000 zCOSMOS spectra of sources selected with I(AB) < 22.5 to define the density field out to z~1, with much greater resolution in the radial dimension than has been possible with either photometric redshifts or weak lensing. We apply new algorithms that we have developed (ZADE) to incorporate objects not yet observed spectroscopically by modifying their photometric redshift probability distributions using the spectroscopic redshifts of nearby galaxies. This strategy allows us to probe a broader range of galaxy environments and reduce the Poisson noise in the density field. The reconstructed overdensity field of the 10k zCOSMOS galaxies consists of cluster-like patterns surrounded by void-like regions, extending up to z~1. Some of these structures are very large, spanning the ~50 Mpc/h transverse direction of the COSMOS field and extending up to Delta z~0.05 in redshift. We present the three dimensional overdensity maps and compare the reconstructed overdensity field to the independently identified virialised groups of galaxies and clusters detected in the visible and in X-rays. The distribution of the overdense structures is in general well traced by these virialised structures. A comparison of the large scale structures in the zCOSMOS data and in the mock catalogues reveals an excellent agreement between the fractions of the volume enclosed in structures of all sizes above a given overdensity between the data and the mocks in 0.2, Comment: 35 pages, 20 figures; submitted to ApJ; the high resolution pdf available at http://www.exp-astro.phys.ethz.ch/kovac/public/zCOSMOS
Published: 2010
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12. On the cosmic evolution of the scaling relations between black holes and their host galaxies: Broad Line AGN in the zCOSMOS survey

Author: Merloni, A., Bongiorno, A., Bolzonella, M., Brusa, M., Civano, F., Comastri, A., Elvis, M., Fiore, F., Gilli, R., Hao, H., Jahnke, K., Koekemoer, A. M., Lusso, E., Mainieri, V., Mignoli, M., Miyaji, T., Renzini, A., Salvato, M., Silverman, J., Trump, J., Vignali, C., Zamorani, G., Capak, P., Lilly, S. J., Sanders, D., Taniguchi, Y., Bardelli, S., Carollo, C. M., Caputi, K., Contini, T., Coppa, G., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Hasinger, G., Impey, C., Iovino, A., Iwasawa, K., Kampczyk, P., Kneib, J. -P., Knobel, C., Kovac, K., Lamareille, F., Borgne, J. -F. Le, Brun, V. Le, Fevre, O. Le, Maier, C., Pello, R., Peng, Y., Montero, E. Perez, Ricciardelli, E., Scodeggio, M., Tanaka, M., Tasca, L. A. M., Tresse, L., Vergani, D., Zucca, E., Merloni A., Bongiorno A., Bolzonella M., Brusa M., Civano F., Comastri A., Elvis M., Fiore F., Gilli R., Hao H., Jahnke K., Koekemoer A.M., Lusso E., Mainieri V., Mignoli M., Miyaji T., Renzini A., Salvato M., Silverman J., Trump J., Vignali C., Zamorani G., Capak P., Lilly S.J., Sanders D., Taniguchi Y., Bardelli S., Carollo C.M., Caputi K., Contini T., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Hasinger G., Impey C., Iovino A., Iwasawa K., Kampczyk P., Kneib J.-P., Knobel C., Kovac K., Lamareille F., Le Borgne J.-F., Le Brun V., Le Fevre O., Maier C., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Scodeggio M., Tanaka M., Tasca L. A. M., Tresse L., Vergani D., and Zucca E.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), cosmology: observations – galaxies: active – galaxies: evolution – quasars: emission lines, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: (Abriged) We report on the measurement of the rest frame K-band luminosity and total stellar mass of the hosts of 89 broad line Active Galactic Nuclei detected in the zCOSMOS survey in the redshift range 1, Comment: 47 pages, 8 figures. Accepted for publication in ApJ
Published: 2009

13. The zCOSMOS Redshift Survey: How group environment alters global downsizing trends

Author: Iovino A., Scodeggio M., Knobel C., Kova, #269, Lilly S., Bolzonella M., Tasca L. A. M., Zamorani G., Zucca E., Caputi K., Pozzetti L., Oesch P., Lamareille F., Halliday C., Bardelli S., Finoguenov A., Guzzo L., Kampczyk P., Maier C., Tanaka M., Vergani D., Carollo C. M., Contini T., Kneib J. P., Le Fèvre O., Mainieri V., Renzini A., Bongiorno A., Coppa G., de La Torre S., de Ravel L., Franzetti P., Garilli B., Le Borgne J. F., Le Brun V., Mignoli M., Pellò R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Tresse L., Abbas U., Bottini D., Cappi A., Cassata P., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Porciani C., Scaramella R., Schiminovich D., Scoville N., CUCCIATI, OLGA, CIMATTI, ANDREA, AUTRES, Dipartimento di Fisica, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), INAF- Milano, Istituto Nazionale di Astrofisica (INAF), Università di Bologna, Dipartimento di Astronomia, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), INAF - Osservatorio Astronomico di Brera (OAB), INAF - Osservatorio Astronomico di Bologna (OABO), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Tokai University, INAF - Osservatorio Astrofisico di Arcetri (OAA), University of Chicago, Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Space Telescope Science Institute (STSci), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), California Institute of Technology (CALTECH), Iovino A., Cucciati O., Scodeggio M., Knobel C., Kova&#269, K., Lilly S., Bolzonella M., Tasca L. A. M., Zamorani G., Zucca E., Caputi K., Pozzetti L., Oesch P., Lamareille F., Halliday C., Bardelli S., Finoguenov A., Guzzo L., Kampczyk P., Maier C., Tanaka M., Vergani D., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Bongiorno A., Coppa G., de La Torre S., de Ravel L., Franzetti P., Garilli B., Le Borgne J.-F., Le Brun V., Mignoli M., Pellò R., Peng Y., Perez-Montero E., Ricciardelli E., Silverman J. D., Tresse L., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Porciani C., Scaramella R., Schiminovich D., Scoville N., Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Interactions, Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Luminosity, Clusters, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Galaxy formation and evolution, Mass segregation, Evolution - Galaxies, Galaxies, General - Galaxies, Astronomy and Astrophysics, Space and Planetary Science, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, education.field_of_study, 010308 nuclear & particles physics, Redshift survey, Galaxy, Redshift, Low Mass, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We took advantage of the wealth of information provided by the first ~10000 galaxies of the zCOSMOS-bright survey and its group catalogue to study the complex interplay between group environment and galaxy properties. The classical indicator F_blue (fraction of blue galaxies) proved to be a simple but powerful diagnostic tool. We studied its variation for different luminosity and mass selected galaxy samples. Using rest-frame B-band selected samples, the groups galaxy population exhibits significant blueing as redshift increases, but maintains a lower F_blue with respect both to the global and the isolated galaxy population. However moving to mass selected samples it becomes apparent that such differences are largely due to the biased view imposed by the B-band luminosity selection, being driven by the population of lower mass, bright blue galaxies for which we miss the redder, equally low mass, counterparts. By focusing the analysis on narrow mass bins such that mass segregation becomes negligible we find that only for the lowest mass bin explored (logMass = 10.8 are already in place at z ~ 1 and do not exhibit any strong environmental dependence, possibly originating from so-called 'nature'/internal mechanisms. In contrast, for lower galaxy masses and redshifts lower than z ~ 1, we observe the emergence in groups of a population of 'nurture' red galaxies: slightly deviating from the trend of the downsizing scenario followed by the global galaxy population, and more so with cosmic time. These galaxies exhibit signatures of group-related secular physical mechanisms directly influencing galaxy evolution., Submitted to A&A, revised version after referee comments
Published: 2009
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14. An optical group catalogue to z = 1 from the zCOSMOS 10k sample

Author: Knobel, C., Lilly S. J., Iovino A., Porciani C., Kova, #269, Finoguenov A., Kitzbichler M. G., Carollo C. M., Contini T., Kneib J. P., LeFèvre O., Mainieri V., Renzini A., Scodeggio M., Zamorani G., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Kampczyk P., Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Montero E. Perez, Ricciardelli E., Silverman J. D., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Fumana M., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Pozzetti L., Scaramella R., CUCCIATI, OLGA, CIMATTI, ANDREA, Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), AUTRES, INAF- Milano, INAF - Osservatorio Astrofisico di Arcetri (OAA), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Knobel, C., Lilly S. J., Iovino A., Porciani C., Kova&#269, K., Cucciati O., Finoguenov A., Kitzbichler M. G., Carollo C. M., Contini T., Kneib J.-P., LeFèvre O., Mainieri V., Renzini A., Scodeggio M., Zamorani G., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Kampczyk P., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Montero E. Perez, Ricciardelli E., Silverman J. D., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Fumana M., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Pozzetti L., and Scaramella R.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, galaxies: high-redshift, Galaxy group, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Group (mathematics), Velocity dispersion, Astronomy and Astrophysics, methods: data analysis, Redshift, Galaxy, Space and Planetary Science, galaxies: clusters: general, Catalogs, Galaxies: clusters: general, Galaxies: high-redshift, Methods: data analysis, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], Astrophysics - Instrumentation and Methods for Astrophysics, catalogs, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present a galaxy group catalogue spanning the redshift range 0.1 = 5 spectroscopically confirmed members, with a further ~700 groups with 2, Comment: 20 pages, 19 figures, accepted for publication in ApJ
Published: 2009
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15. The zCOSMOS Redshift Survey: the role of environment and stellar mass in shaping the rise of the morphology-density relation from z~1

Author: Tasca L. A. M., Kneib J. P., Iovino A., Le Fèvre O., Kova, #269, Bolzonella M., Lilly S. J., Abraham R. G., Cassata P., Guzzo L., Tresse L., Zamorani G., Capak P., Garilli B., Scodeggio M., Sheth K., Zucca E., Carollo C. M., Contini T., Mainieri V., Renzini A., Bardelli S., Bongiorno A., Caputi K., Coppa G., de La Torre S., de Ravel L., Franzetti P., Kampczyk P., Knobel C., Koekemoer A. M., Lamareille F., Le Borgne J. F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Vergani D., Tanaka M., Abbas U., Bottini D., Cappi A., Ilbert O., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Pozzetti L., Scaramella R., Scarlata C., CUCCIATI, OLGA, CIMATTI, ANDREA, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), AUTRES, INAF - Osservatorio Astronomico di Bologna (OABO), Mathématiques - Analyse, Probabilités, Modélisation - Orléans (MAPMO), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), INAF- Milano, California Institute of Technology (CALTECH), Spitzer Science Center, California Institute of Technology, Pasadena, University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Space Telescope Science Institute (STSci), Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Human Genetics Center, The University of Texas Health Science Center at Houston (UTHealth), School of Biotechnology and Biomolecular Sciences, University of New South Wales [Sydney] (UNSW), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Tasca L. A. M., Kneib J.-P., Iovino A., Le Fèvre O., Kova&#269, K., Bolzonella M., Lilly S. J., Abraham R. G., Cassata P., Cucciati O., Guzzo L., Tresse L., Zamorani G., Capak P., Garilli B., Scodeggio M., Sheth K., Zucca E., Carollo C. M., Contini T., Mainieri V., Renzini A., Bardelli S., Bongiorno A., Caputi K., Coppa G., de La Torre S., de Ravel L., Franzetti P., Kampczyk P., Knobel C., Koekemoer A. M., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Vergani D., Tanaka M., Abbas U., Bottini D., Cappi A., Cimatti A., Ilbert O., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Pozzetti L., Scaramella R., and Scarlata C.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, media_common.quotation_subject, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Luminosity, Galaxy:formation, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Galaxies:structure, Galaxy group, 0103 physical sciences, Cosmology:large-scale structure of universe, Galaxies:distances and redshifts, Galaxies:evolution, Galaxies:fundamental parameters, Astronomy and Astrophysics, Space and Planetary Science, Surface brightness, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common, Physics, 010308 nuclear & particles physics, Redshift survey, Galaxy, Universe, Redshift, 13. Climate action, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: For more than two decades we have known that galaxy morphological segregation is present in the Local Universe. It is important to see how this relation evolves with cosmic time. To investigate how galaxy assembly took place with cosmic time, we explore the evolution of the morphology-density relation up to redshift z~1 using about 10000 galaxies drawn from the zCOSMOS Galaxy Redshift Survey. Taking advantage of accurate HST/ACS morphologies from the COSMOS survey, of the well-characterised zCOSMOS 3D environment, and of a large sample of galaxies with spectroscopic redshift, we want to study here the evolution of the morphology-density relation up to z~1 and its dependence on galaxy luminosity and stellar mass. The multi-wavelength coverage of the field also allows a first study of the galaxy morphological segregation dependence on colour. We further attempt to disentangle between processes that occurred early in the history of the Universe or late in the life of galaxies. The zCOSMOS field benefits of high-resolution imaging in the F814W filter from the Advanced Camera for Survey (ACS). We use standard morphology classifiers, optimised for being robust against band-shifting and surface brightness dimming, and a new, objective, and automated method to convert morphological parameters into early, spiral, and irregular types. We use about 10000 galaxies down to I_AB=22.5 with a spectroscopic sampling rate of 33% to characterise the environment of galaxies up to z~1 from the 100 kpc scales of galaxy groups up to the 100 Mpc scales of the cosmic web. ABRIDGED, Comment: 23 pages, 12 figures, accepted for publication in Astronomy and Astrophysics
Published: 2009
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16. LATE-STAGE GALAXY MERGERS IN COSMOS TO z similar to 1

Author: Lackner, C. N., Silverman, J. D., Salvato, M., Kampczyk, P., Kartaltepe, J. S., Sanders, D., Capak, P., Civano, F., Halliday, C., Ilbert, O., Jahnke, K., Koekemoer, A. M., Lee, N., Le Fevre, O., Liu, C. T., Scoville, N., Sheth, K., Toft, S., Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES)
Subjects: [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: International audience; The role of major mergers in galaxy and black hole formation is not well-constrained. To help address this, we develop an automated method to identify late-stage galaxy mergers before coalescence of the galactic cores. The resulting sample of mergers is distinct from those obtained using pair-finding and morphological indicators. Our method relies on median-filtering of high-resolution images to distinguish two concentrated galaxy nuclei at small separations. This method does not rely on low surface brightness features to identify mergers, and is therefore reliable to high redshift. Using mock images, we derive statistical contamination and incompleteness corrections for the fraction of late-stage mergers. The mock images show that our method returns an uncontaminated (\textless10%) sample of mergers with projected separations between 2.2 and 8 kpc out to z similar to 1. We apply our new method to a magnitude-limited (m(FW 814) \textless 23) sample of 44,164 galaxies from the COSMOS HST/ACS catalog. Using a mass-complete sample with log M-*/M-circle dot \textgreater 10.6 and 0.25 \textless z \textless= 1.00, we find similar to 5% of systems are late-stage mergers. Correcting for incompleteness and contamination, the fractional merger rate increases strongly with redshift as R-merge proportional to (1 + z)(3.8 +/- 0.9), in agreement both with earlier studies and with dark matter halo merger rates. Separating the sample into star-forming and quiescent galaxies shows that the merger rate for star-forming galaxies increases strongly with redshift, (1 + z)(4.5 +/- 1.3), while the merger rate for quiescent galaxies is consistent with no evolution, (1 + z)(1.1 +/- 1.2). The merger rate also becomes steeper with decreasing stellar mass. Limiting our sample to galaxies with spectroscopic redshifts from zCOSMOS, we find that the star formation rates and X-ray selected active galactic nucleus (AGN) activity in likely late-stage mergers are higher by factors of similar to 2 relative to those of a control sample. Combining our sample with more widely separated pairs, we find that 8 +/- 5% of star formation and 20 +/- 8% of AGN activity are triggered by close encounters (\textless143 kpc) or mergers, providing additional evidence that major mergers are not the only channels for star formation and black hole growth.
Published: 2014
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17. The zCOSMOS redshift survey: evolution of the light in bulges and discs since z similar to 0.8

Author: Tasca, L. A. M., Tresse, L., Le Fèvre, O., Ilbert, O., Lilly, S. J., Zamorani, G., Lopez-Sanjuan, C., Ho, L. C., Bardelli, S., Cattaneo, A., Cucciati, O., Farrah, D., Iovino, A., Koekemoer, A. M., Liu, C. T., Massey, R., Renzini, A., Taniguchi, Y., Welikala, N., Zucca, E., Carollo, C. M., Contini, T., Kneib, J. -P., Mainieri, V., Scodeggio, M., Bolzonella, M., Bongiorno, A., Caputi, K., Torre, S., Franzetti, P., Garilli, B., Guzzo, L., Kampczyk, P., Knobel, C., Kovac, K., Lamareille, F., Le Borgne, J. -F., Le Brun, V., Maier, C., Mignoli, M., Pello, R., Peng, Y., Perez Montero, E., Rich, Robert Michael, Tanaka, M., Vergani, D., Bordoloi, R., Cappi, A., Cimatti, Alessandro, Coppa, G., Mccracken, H. J., Moresco, M., Pozzetti, L., Sanders, D., Sheth, K., Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institute for Astronomy [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Istituto Nazionale di Astrofisica (INAF), Kavli Institute for Astronomy and Astrophysics [Beijing] (KIAA-PKU), Peking University [Beijing], INAF - Osservatorio Astronomico di Bologna (OABO), Dipartimento di Fisica, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Department of Physics [Blacksburg], Virginia Tech [Blacksburg], INAF - Osservatorio Astronomico di Brera (OAB), Space Telescope Science Institute (STSci), City University of Hong Kong [Hong Kong] (CUHK), Institute for Computational Cosmology (ICC), Durham University, INAF - Osservatorio Astronomico di Padova (OAPD), Research Center for Space and Cosmic Evolution (RCSCE), Ehime University [Matsuyama, Japon], University of Chicago, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique Fédérale de Lausanne (EPFL), European Southern Observatory (ESO), INAF- Milano, Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Max-Planck-Institut für Extraterrestrische Physik (MPE), Kapteyn Astronomical Institute [Groningen], University of Groningen [Groningen], Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Department of Physics and Astronomy [UCLA Los Angeles], University of California [Los Angeles] (UCLA), University of California (UC)-University of California (UC), National Astronomical Observatory of Japan (NAOJ), INAF - Osservatorio Astrofisico di Arcetri (OAA), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute for Astronomy [Honolulu], University of Hawai‘i [Mānoa] (UHM), National Radio Astronomy Observatory (NRAO), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Università degli studi di Milano [Milano]-Università di Milano-Bicocca, Ehime University [Matsuyama], AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich)-Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, University of California-University of California, Osservatorio Astronomico (INAF), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Galaxies: bulges, Galaxies: fundamental parameters, Galaxies: distances and redshifts, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Galaxies: luminosity function, Mass function, Galaxies: evolution, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: International audience; We studied the chronology of galactic bulge and disc formation by analysing the relative contributions of these components to the B-band rest-frame luminosity density at different epochs. We present the first estimate of the evolution of the fraction of rest-frame B-band light in galactic bulges and discs since redshift z similar to 0.8. We performed a bulge-to-disc decomposition of HST/ACS images of 3266 galaxies in the zCOSMOS-bright survey with spectroscopic redshifts in the range 0.7 \textless= z \textless= 0.9. We find that the fraction of B-band light in bulges and discs is (26 4)% and (74 4)%, respectively. When compared with rest-frame B-band measurements of galaxies in the local Universe in the same mass range (10(9)M circle dot M10(11.5).M circle dot),we find that the B-band light in discs decreases by -30% from z similar to 0.7-0.9 to z 0, while the light from the bulge increases by -30% over the same period of time. We interpret this evolution as the consequence of star formation and mass assembly processes, as well as morphological transformation, which gradually shift stars formed at half the age of the Universe from star-forming late-type/irregular galaxies to earlier types and ultimately into spheroids.
Published: 2014
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18. THE COLORS OF CENTRAL AND SA℡LITE GALAXIES IN zCOSMOS OUT TO z similar or equal to 0.8 AND IMPLICATIONS FOR QUENCHING

Author: Knobel, C., Lilly, S. J., Kovac, K., Peng, Y., Bschorr, T. J., Carollo, C. M., Contini, T., Kneib, J. -P., Le Fevre, O., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Cucciati, O., Torre, S., Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Lamareille, F., Le Borgne, J. -F., Le Brun, V., Maier, C., Mignoli, M., Pello, R., Perez Montero, E., Presotto, V., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., BARNES, L., Bordoloi, R., Cappi, A., Cimatti, Alessandro, Coppa, G., Koekemoer, A. M., Lopez-Sanjuan, C., McCracken, H. J., Moresco, M., Nair, P., Pozzetti, L., Welikala, N., Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES)
Subjects: [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: International audience; We examine the red fraction of central and satellite galaxies in the large zCOSMOS group catalog out to z similar or equal to 0.8, correcting for both the incompleteness in stellar mass and for the less than perfect purities of the central and satellite samples. We show that at all masses and at all redshifts, the fraction of satellite galaxies that have been quenched, i.e., that are red, is systematically higher than that of centrals, as seen locally in the Sloan Digital Sky Survey (SDSS). The satellite quenching efficiency, which is the probability that a satellite is quenched because it is a satellite rather than a central, is, as locally, independent of stellar mass. Furthermore, the average value is about 0.5, which is also very similar to that seen in the SDSS. We also construct the mass functions of blue and red centrals and satellites and show that these broadly follow the predictions of the Peng et al. analysis of the SDSS groups. Together, these results indicate that the effect of the group environment in quenching satellite galaxies was very similar to what it is today when the universe was about half its present age.
Published: 2013
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19. Investigating the relationship between AGN activity and stellar mass in zCOSMOS galaxies at 0

Author: Vitale, M., Mignoli, M., Cimatti, A., Lilly, S. J., Carollo, C. M., Contini, T., Kneib, J. -P., Fevre, O. Le, Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Barnes, L., Bolzonella, M., Bongiorno, A., Bordoloi, R., Bschorr, T. J., Cappi, A., Caputi, K., Coppa, G., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Kovac, K., Lamareille, F., Borgne, J. -F. Le, Brun, V. Le, Lopez-Sanjuan, C., Maier, C., McCracken, H. J., Moresco, M., Nair, P., Oesch, P. A., Pello, R., Peng, Y., Montero, E. Perez, Pozzetti, L., Presotto, V., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Welikala, N., and Zucca, E.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: We investigate the link between AGN activity, star-formation and stellar mass of the host galaxy at 010.2 threshold. Moreover, the stellar populations of AGN hosts are found to be older with respect to star-forming and composites galaxies. This could be due to the the tendency of AGN to reside in massive hosts. The dependence of the AGN classification on the stellar mass is in agreement with what has been already found in previous studies. It is consistent with, together with the evidence of older stellar populations inhabiting the AGN-like galaxies, the downsizing scenario. In particular, our evidence points to an evolutionary scenario where the AGN-feedback is capable of quenching the star formation in the most massive galaxies. Therefore, the AGN-feedback is the best candidate for initiating the passive evolutionary phase of galaxies., Accepted for publication in A&A
Published: 2013
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20. Environmental effects in the interaction and merging of galaxies in zCOSMOS survey

Author: Kampczyk, P., Lilly, S. J., and Collaboration, the zCOSMOS
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The zCOSMOS-bright 10k spectroscopic sample reveals a strong environmental dependence of close kinematic galaxy pair fractions in the redshift range 0.2 < z < 1. The fraction of close pairs is three times higher in the top density quartile than in the lowest one. This environmental variation in pair fractions will translate into merger fractions since merger timescales are shown, based on Millennium simulation catalogs, to be largely independent of environment. While galactic properties of close kinematic pairs (morphologies and star formation rates) may seem to be non-representative of an underlying galaxy population, they can be explained by taking into account well-known effects of environment, and changes caused by interactions. The latter is responsible for an increase of irregular galaxies in pairs by a factor of 50-75%, with a disproportionate increase in the number of irregular-irregular pairs (4-8 times), due to disturbance of about 15% of the disk galaxies in pairs. Another sign of interaction is an observed boost in specific star formation rate (factor 2-4) for the closest pairs. While significant for paired galaxies, this triggered star-formation due to interactions represents only about 5% of the integrated star-formation activity in our volume-limited sample. Although majority of close kinematic pairs are in dense environments, the effects of interactions appear to be strongest in the lower density environments. This may introduce strong biases into observational studies of mergers, especially those based on morphological criteria. Relative excess of post-starburst galaxies observed in paired galaxies (factor \sim2) as well as excess of AGNs (factor of over 2), linked with environmental dependence of the pair fractions could indicate that early phases of interactions and merging are plausible candidates for environmental quenching, observed in the global galaxy populations., To appear on the Proceedings of the Conference "Galaxy Mergers in an Evolving Universe", held in Hualien, Taiwan, on October 23-28, 2011
Published: 2012
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21. Accreting SMBHs in the COSMOS field and the connection to their host galaxies

Author: Bongiorno, A., Merloni, A., Brusa, M., Magnelli, B., Salvato, M., Mignoli, M., Zamorani, G., Fiore, F., Rosario, D., Mainieri, V., Comastri, A., Vignali, C., Balestra, I., Bardelli, S., Berta, S., Civano, F., Kampczyk, P., Floc'h, E. Le, Lusso, E., Lutz, D., Pozzetti, L., Pozzi, F., Riguccini, L., Shankar, F., and Silverman, J.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Using the wide multi-band photometry available in the COSMOS field we explore the host galaxy properties of a large sample of Active Galactic Nuclei (AGN) obtained by combining X-ray and optical spectroscopic selections. Based on a careful study of their Spectral Energy Distribution (SED), which has been parametrized using a 2-component (AGN+galaxy) model fit, we derived dust-corrected rest-frame magnitudes, colors, stellar masses and star formation rates (SFRs). We find that AGN hosts span a large range of stellar masses and SFRs. No color-bimodality is seen at any redshift in the AGN hosts, which are found to be mainly massive, red galaxies. Once accounting for the color-mass degeneracy in well defined mass-matched samples, we find a residual marginal enhancement of AGN incidence in redder galaxies with lower specific star formation rates, and we argue that this result might emerge because of our ability to properly account for AGN light contamination and dust extinction. Interestingly, we find that the probability for a galaxy to host a black hole growing at any given "specific accretion rate" (i.e. the ratio of X-ray luminosity to the host stellar mass) is almost independent of the host galaxy mass, while it decreases as a power-law with Lx/M. By analyzing the normalization of such probability distribution, we show how the incidence of AGN increases with redshift as rapidly as (1+z)^4, in close resemblance with the overall evolution of the specific star formation rate of the entire galaxy population. Although AGN activity and star formation in galaxies do appear to have a common triggering mechanism, at least in a statistical sense, within the COSMOS sample we do not find strong evidence of any 'smoking gun' signaling powerful AGN influence on the star-forming properties of their hosts galaxies., Comment: 32 pages, 25 figures, 4 tables, accepted for publication in MNRAS
Published: 2012
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22. The evolution of quiescent galaxies at high redshifts (z≥ 1.4)

Author: Sánchez, H. Domínguez, Pozzi, F., Gruppioni, C., Cimatti, A., Ilbert, O., Pozzetti, L., McCracken, H., Capak, P., Floch, E. Le, Salvato, M., Zamorani, G., Carollo, C. M., Contini, T., Kneib, J. P., Févre, O. Le, Lilly, S. J., Mainieri, V., Renzini, A., Scodeggio, M., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Kovac, K., Lamareille, F., Borgne, J. F. Le, Brun, V. Le, Maier, C., Mignoli, M., Pelló, R., Peng, Y., Pérez-Montero, E., Ricciardelli, E., Silverman, J. D., Tanaka, M., Tasca, L. A. M., Tresse, L., Vergani, D., Zucca, E., Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: galaxies: high-redshift, galaxies: star formation, evolution, Galaxies: high-redshift, Galaxies: star formation [Galaxies], Astrophysics::Solar and Stellar Astrophysics, [INFO]Computer Science [cs], Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Monthly Notices of the Royal Astronomical Society, 417 (2), ISSN:0035-8711, ISSN:1365-2966, ISSN:1365-8711
Published: 2011
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23. The nonlinear biasing of the 10k zCOSMOS galaxies up to z~1

Author: Kovac, K., Porciani, C., Lilly, S. J., Marinoni, C., Guzzo, L., Cucciati, O., Zamorani, G., Iovino, A., Oesch, P., Bolzonella, M., Peng, Y., Meneux, B., Zucca, E., Bardelli, S., Carollo, C. M., Contini, T., Kneib, J. -P., Fevre, O. Le, Mainieri, V., Renzini, A., Scodeggio, M., Bongiorno, A., Caputi, K., Coppa, G., de la Torre, S., de Ravel, L., Finoguenov, A., Franzetti, P., Garilli, B., Kampczyk, P., Knobel, C., Lamareille, F., Borgne, J. -F. Le, Brun, V. Le, Maier, C., Mignoli, M., Pello, R., Montero, E. Perez, Pozzetti, L., Ricciardelli, E., Silverman, J. D., Tanaka, M., Tasca, L. A. M., Tresse, L., Vergani, D., Abbas, U., Bottini, D., Cappi, A., Cassata, P., Cimatti, A., Fumana, M., Koekemoer, A. M., Leauthaud, A., Maccagni, D., McCracken, H. J., Memeo, P., Scaramella, R., Scoville, N. Z., AUTRES, Institute for Astronomy [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Dipartimento di Fisica, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Hunan Normal University, University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), European Southern Observatory (ESO), College of Computing (GATECH), Georgia Institute of Technology [Atlanta], Max-Planck-Institut für Extraterrestrische Physik (MPE), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Département Informatique pour les Systèmes Coopératifs Ouverts et Décentralisés (ISCOD-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Henri Fayol, Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Departamento de Informatica [Valparaíso, Chile], Universidad Tecnica Federico Santa Maria [Valparaiso] (UTFSM), INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Hunan Normal University (HNU), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Torino (OATo), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (... - 2019) (UNS), and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We use the overdensity field reconstructed in the volume of the COSMOS area to study the nonlinear biasing of the zCOSMOS galaxies. The galaxy overdensity field is reconstructed using the current sample of ~8500 accurate zCOSMOS redshifts at I(AB) = b(delta,z,R) delta is of the following characteristic shape. The function vanishes in the most underdense regions and then sharply rises in a nonlinear way towards the mean densities. is almost a linear tracer of the matter in the overdense regions, up to the most overdense regions in which it is nonlinear again and the local effective slope of vs. delta is smaller than unity. The function is evolving only slightly over the redshift interval 0.4, Comment: 29 pages, 21 figures, submitted to ApJ, the high resolution pdf available at http://www.exp-astro.phys.ethz.ch/kovac/public/zCOSMOS/
Published: 2011
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24. The zCOSMOS-Bright survey: the clustering of early and late galaxy morphological types since z similar or equal to 1

Author: de la Torre, S., Le Fevre, O., Porciani, C., Guzzo, L., Meneux, B., Abbas, U., Tasca, L., Carollo, C. M., Contini, T., Kneib, J. -P., Lilly, S. J., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de Ravel, L., Franzetti, P., Garilli, B., Halliday, C., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Kovac, K., Lamareille, F., Le Borgne, J. -F., Le Brun, V., Maier, C., Mignoli, M., Pello, R., Peng, Y., Perez-Montero, E., Ricciardelli, E., Silverman, J., Tanaka, M., Tresse, L., Vergani, D., Zucca, E., Bottini, D., Cappi, A., Cassata, P., Cimatti, A., Leauthaud, A., Maccagni, D., Marinoni, C., McCracken, H. J., Memeo, P., Oesch, P., Pozzetti, L., Scaramella, R., and Astronomy
Subjects: REDSHIFT SURVEY, DIGITAL-SKY-SURVEY, 2-POINT CORRELATION-FUNCTION, Astrophysics::Cosmology and Extragalactic Astrophysics, VLT DEEP SURVEY, ENVIRONMENTAL DEPENDENCE, COLD DARK-MATTER, SPECTRAL TYPE, galaxies: high-redshift, cosmology: observations, LARGE-SCALE STRUCTURE, SPECTROSCOPIC SAMPLE, LUMINOSITY DEPENDENCE, large-scale structure of Universe, galaxies: evolution, Astrophysics::Galaxy Astrophysics, galaxies: statistics
Abstract: We measure the spatial clustering of galaxies as a function of their morphological type at z similar or equal to 0.8, for the first time in a deep redshift survey with full morphological information. This is obtained by combining high-resolution Hubble Space Telescope imaging and Very Large Telescope spectroscopy for about 8500 galaxies to with accurate spectroscopic redshifts from the zCOSMOS-Bright redshift survey. At this epoch, early-type galaxies already show a significantly stronger clustering than late-type galaxies on all probed scales. A comparison to the Sloan Digital Sky Survey Data at z similar or equal to 0.1 shows that the relative clustering strength between early and late morphological classes tends to increase with cosmic time at small separations, while on large scales it shows no significant evolution since z similar or equal to 0.8. This suggests that most early-type galaxies had already formed in intermediate and dense environments at this epoch. Our results are consistent with a picture in which the relative clustering of different morphological types between z similar or equal to 1 and 0 reflects the evolving role of environment in the morphological transformation of galaxies, on top of a global evolution driven by mass.
Published: 2011

25. The zCOSMOS-Bright survey: the clustering of early and late galaxy morphological types since z≃ 1

Author: De La Torre, S., Le Fèvre, O., Porciani, C., Guzzo, L., Meneux, B., Abbas, U., Tasca, L., Carollo, C. M., Contini, T., Kneib, J.-P., Lilly, S. J., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., De Ravel, L., Franzetti, P., Garilli, B., Halliday, C., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Kovač, K., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Maier, C., Mignoli, M., Pelló, R., Peng, Y., Perez-Montero, E., Ricciardelli, E., Silverman, J., Tanaka, M., Tresse, L., Vergani, D., Zucca, E., Bottini, D., Cappi, A., Cassata, P., Cimatti, Alessandro, Leauthaud, A., Maccagni, D., Marinoni, Christian, McCracken, H. J., Memeo, P., Oesch, P., Pozzetti, L., Scaramella, R., Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Torino (OATo), Istituto Nazionale di Astrofisica (INAF), University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute for Astronomy [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), European Southern Observatory (ESO), College of Computing (GATECH), Georgia Institute of Technology [Atlanta], AUTRES, Dipartimento di Fisica, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Institut de recherche en astrophysique et planétologie (IRAP), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Hunan Normal University (HNU), INAF - Osservatorio Astrofisico di Arcetri (OAA), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Hunan Normal University, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We measure the spatial clustering of galaxies as a function of their morphological type at z~0.8, for the first time in a deep redshift survey with full morphological information. This is obtained by combining high-resolution HST imaging and VLT spectroscopy for about 8,500 galaxies to I_AB=22.5 with accurate spectroscopic redshifts from the zCOSMOS-Bright redshift survey. At this epoch, early-type galaxies already show a significantly stronger clustering than late-type galaxies on all probed scales. A comparison to the SDSS at z~0.1, shows that the relative clustering strength between early and late morphological classes tends to increase with cosmic time at small separations, while on large scales it shows no significant evolution since z~0.8. This suggests that most early-type galaxies had already formed in intermediate and dense environments at this epoch. Our results are consistent with a picture in which the relative clustering of different morphological types between z~1 and z~0, reflects the evolving role of environment in the morphological transformation of galaxies, on top of the global mass-driven evolution., Comment: 10 pages, 10 figures, accepted for publication in MNRAS
Published: 2011
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26. The evolution of quiescent galaxies at high redshift (z > 1.4)

Author: S��nchez, H. Dom��nguez, Pozzi, F., Gruppioni, C., Cimatti, A., Ilbert, O., Pozzetti, L., McCracken, H., Capak, P., Floch, E. Le, Salvato, M., Zamorani, G., Carollo, C. M., Contini, T., Kneib, J. P., F��vre, O. Le, Lilly, S. J., Mainieri, V., Renzini, A., Scodeggio, M., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Kovac, K., Lamareille, F., Borgne, J. F. Le, Brun, V. Le, Maier, C., Mignoli, M., Pell��, R., Peng, Y., P��rez-Montero, E., Ricciardelli, E., Silverman, J. D., Tanaka, M., Tasca, L. A. M., Tresse, L., Vergani, D., and Zucca, E.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: We have studied the evolution of high redshift quiescent galaxies over an effective area of ~1.7 deg^2 in the COSMOS field. Galaxies have been divided according to their star-formation activity and the evolution of the different populations has been investigated in detail. We have studied an IRAC (mag_3.6 < 22.0) selected sample of ~18000 galaxies at z > 1.4 with multi-wavelength coverage. We have derived accurate photometric redshifts (sigma=0.06) and other important physical parameters through a SED-fitting procedure. We have divided our sample into actively star-forming, intermediate and quiescent galaxies depending on their specific star formation rate. We have computed the galaxy stellar mass function of the total sample and the different populations at z=1.4-3.0. We have studied the properties of high redshift quiescent galaxies finding that they are old (1-4 Gyr), massive (log(M/M_sun)~10.65), weakly star forming stellar populations with low dust extinction (E(B-V) < 0.15) and small e-folding time scales (tau ~ 0.1-0.3 Gyr). We observe a significant evolution of the quiescent stellar mass function from 2.5 < z < 3.0 to 1.4 < z < 1.6, increasing by ~ 1 dex in this redshift interval. We find that z ~ 1.5 is an epoch of transition of the GSMF. The fraction of star-forming galaxies decreases from 60% to 20% from z ~ 2.5-3.0 to z ~ 1.4-1.6 for log(M/M_sun) > 11, while the quiescent population increases from 10% to 50% at the same redshift and mass intervals. We compare the fraction of quiescent galaxies derived with that predicted by theoretical models and find that the Kitzbichler & White (2007) model is the one that better reproduces the data. Finally, we calculate the stellar mass density of the star-forming and quiescent populations finding that there is already a significant number of quiescent galaxies at z > 2.5 (rho~6.0 MsunMpc^-3)., 17 pages, 20 figures, 5 tables. Accepted for publication in MNRAS
Published: 2011
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27. X-ray Groups of Galaxies at 0.5

Author: Tanaka, M., Finoguenov, A., Lilly, S. J., Bolzonella, M., Carollo, C. M., Contini, T., Iovino, A., Kneib, J. -P., Lamareille, F., Fevre, O. Le, Mainieri, V., Presotto, V., Renzini, A., Scodeggio, M., Silverman, J. D., Zamorani, G., Bardelli, S., Bongiorno, A., Caputi, K., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Kampczyk, P., Knobel, C., Kovac, K., Borgne, J. -F. Le, Brun, V. Le, Lopez-Sanjuan, C., Maier, C., Mignoli, M., Pello, R., Peng, Y., Montero, E. Perez, Tasca, L., Tresse, L., Vergani, D., Zucca, E., Barnes, L., Bordoloi, R., Cappi, A., Cimatti, A., Coppa, G., Koekemoer, A. M., McCracken, H. J., Moresco, M., Nair, P., Oesch, P., Pozzetti, L., and Welikala, N.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: We present a photometric and spectroscopic study of galaxies at 0.5, 11 pages, 7 figures, accepted for publication in PASJ
Published: 2011
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28. The impact of galaxy interactions on AGN activity in zCOSMOS

Author: Silverman, J. D., Kampczyk, P., Jahnke, K., Andrae, R., Lilly, S., Elvis, M., Civano, F., Mainieri, V., Vignali, C., Zamorani, G., Nair, P., Fevre, O. Le, de Ravel, L., Bardelli, S., Bongiorno, A., Bolzonella, M., Brusa, M., Cappelluti, N., Cappi, A., Caputi, K., Carollo, C. M., Contini, T., Coppa, G., Cucciati, O., de la Torre, S., Franzetti, P., Garilli, B., Halliday, C., Hasinger, G., Iovino, A., Knobel, C., koekemoer, A., Kovac, K., Lamareille, F., Borgne, J. -F. Le, Brun, V. Le, Maier, C., Mignoli, M., Pello, R., Montero, E. Perez, Ricciardelli, E., Peng, Y., Scodeggio, M., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., Comastri, A., Finoguenov, A., Fu, H., Gilli, R., Hao, H., Ho, L., and Salvato, M.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Close encounters between galaxies are expected to be a viable mechanism, as predicted by numerical simulations, by which accretion onto supermassive black holes can be initiated. To test this scenario, we construct a sample of 562 galaxies (M*>2.5x10^10 M_sun) in kinematic pairs over the redshift range 0.25 < z < 1.05 that are more likely to be interacting than a well-matched control sample of 2726 galaxies not identified as being in a pair, both from the zCOSMOS 20k spectroscopic catalog. Galaxies that harbor an active galactic nucleus (AGN) are identified on the basis of their X-ray emission (L_x>2x10^42 erg s^-1) detected by Chandra. We find a higher fraction of AGN in galaxies in pairs relative to isolated galaxies of similar stellar mass. Our result is primarily due to an enhancement of AGN activity, by a factor of 1.9 (observed) and 2.6 (intrinsic), for galaxies in pairs of projected separation less than 75 kpc and line-of-sight velocity offset less than 500 km s^-1. This study demonstrates that close kinematic pairs are conducive environments for black hole growth either indicating a causal physical connection or an inherent relation, such as, to enhanced star formation. In the Appendix, we describe a method to estimate the intrinsic fractions of galaxies (either in pairs or the field) hosting an AGN with confidence intervals, and an excess fraction in pairs. We estimate that 17.8_{-7.4}^{+8.4}% of all moderate-luminosity AGN activity takes place within galaxies undergoing early stages of interaction that leaves open the question as to what physical processes are responsible for fueling the remaining ~80% that may include late-stage mergers., 11 pages, 8 figures, Accepted by The Astrophysical Journal
Published: 2011
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29. Understanding the shape of the galaxy two-point correlation function at z ~= 1 in the COSMOS field

Author: de la Torre, S., Guzzo, L., Kovač, K., Porciani, C., Abbas, U., Meneux, B., Carollo, C. M., Contini, T., Kneib, J. P., Le Fèvre, O., Lilly, S. J., Mainieri, V., Renzini, A., Sanders, D., Scodeggio, M., Scoville, N., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Lamareille, F., Le Borgne, J.-F, Le Brun, V., Maier, C., Mignoli, M., Pelló, R., Peng, Y., Perez-Montero, E., Ricciardelli, E., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Welikala, N., Zucca, E., Bottini, D., Cappi, A., Cassata, P., Cimatti, A., Fumana, M., Ilbert, O., Leauthaud, A., Maccagni, D., Marinoni, C., McCracken, H. J., Memeo, P., Nair, P., Oesch, P., Pozzetti, L., Presotto, V., Scaramella, R., Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: galaxies: high-redshift, cosmology: observations, [INFO]Computer Science [cs], Astrophysics::Cosmology and Extragalactic Astrophysics, large-scale structure of Universe, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, evolution, galaxies: statistics, large-scale structure of Universe [galaxies], ComputingMilieux_MISCELLANEOUS
Abstract: Monthly Notices of the Royal Astronomical Society, 409 (2), ISSN:0035-8711, ISSN:1365-2966, ISSN:1365-8711
Published: 2010
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30. Understanding the shape of the galaxy two-point correlation function at z~1 in the COSMOS field

Author: de la Torre, S., Guzzo, L., Kovac, K., Porciani, C., Abbas, U., Meneux, B., Carollo, C. M., Contini, T., Kneib, J. -P., Fevre, O. Le, Lilly, S. J., Mainieri, V., Renzini, A., Sanders, D., Scodeggio, M., Scoville, N., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Koekemoer, A. M., Lamareille, F., Borgne, J. -F. Le, Brun, V. Le, Maier, C., Mignoli, M., Pello, R., Peng, Y., Perez-Montero, E., Ricciardelli, E., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Welikala, N., Zucca, E., Bottini, D., Cappi, A., Cassata, P., Cimatti, A., Fumana, M., Ilbert, O., Leauthaud, A., Maccagni, D., Marinoni, C., McCracken, H. J., Memeo, P., Nair, P., Oesch, P., Pozzetti, L., Presotto, V., and Scaramella, R.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We investigate how the shape of the galaxy two-point correlation function as measured in the zCOSMOS survey depends on local environment, quantified in terms of the density contrast on scales of 5 Mpc/h. We show that the flat shape previously observed at redshifts between z=0.6 and z=1 can be explained by this volume being simply 10% over-abundant in high-density environments, with respect to a Universal density probability distribution function. When galaxies corresponding to the top 10% tail of the distribution are excluded, the measured w_p(r_p) steepens and becomes indistinguishable from LCDM predictions on all scales. This is the same effect recognised by Abbas & Sheth in the SDSS data at z~0 and explained as a natural consequence of halo-environment correlations in a hierarchical scenario. Galaxies living in high-density regions trace dark matter halos with typically higher masses, which are more correlated. If the density probability distribution function of the sample is particularly rich in high-density regions because of the variance introduced by its finite size, this produces a distorted two-point correlation function. We argue that this is the dominant effect responsible for the observed "peculiar" clustering in the COSMOS field., 6 pages, 3 figures, accepted for publication in MNRAS
Published: 2010
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31. The Dependence of Star Formation Activity on Stellar Mass Surface Density and Sersic Index in zCOSMOS Galaxies at 0.5

Author: Maier, C., Lilly, S. J., Zamorani, G., Scodeggio, M., Lamareille, F., Contini, T., Sargent, M. T., Scarlata, C., Oesch, P., Carollo, C. M., Fevre, O. Le, Renzini, A., Kneib, J. -P., Mainieri, V., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Coppa, G., Cucciati, O., De La Torre, S., De Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Knobel, C., Kovac, K., Borgne, J. -F. Le, Brun, V. Le, Mignoli, M., Pello, R., Peng, Y., Montero, E. Perez, Ricciardelli, E., Silverman, J. D., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., Abbas, U., Bottini, D., Cappi, A., Cassata, P., Cimatti, Alessandro, Fumana, M., Guzzo, L., Halliday, C., Leauthaud, A., Maccagni, D., Marinoni, Christian, McCracken, H. J., Memeo, P., Meneux, B., Porciani, C., Pozzetti, L., Scaramella, R., Walcher, J., Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2
Subjects: [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: One of the key unanswered questions in the study of galaxy evolution is what physical processes inside galaxies drive the changes in the SFRs in individual galaxies that, taken together, produce the large decline in the global star-formation rate density (SFRD) to redshifts since z~2. Many studies of the SFR at intermediate redshifts have been made as a function of the integrated stellar mass of galaxies but these did not use information on the internal structural properties of the galaxies. In this paper we present a comparative study of the dependence of SFRs on the average surface mass densities (SigmaM) of galaxies of different morphological types up to z~1 using the zCOSMOS and SDSS surveys. The main findings about the evolution of these relatively massive galaxies are: 1) There is evidence that, for both SDSS ans zCOSMOS galaxies, the mean specific SFR within a given population (either disk-dominated or bulge-dominated) is independent of SigmaM; 2) The observed SSFR - SigmaM step-function relation is due, at all investigated redshifts, to the changing mix of disk-dominated and bulge-dominated galaxies as surface density increases and the strong difference in the average SSFR between disks and bulges. We also find a modest differential evolution in the size-mass relations of disk and spheroid galaxies; 3) The shape of the median SSFR - SigmaM relation is similar, but with median SSFR values that are about 5-6 times higher in zCOSMOS galaxies than for SDSS, across the whole range of SigmaM, and in both spheroid and disk galaxies. This increase matches that of the global SFRD of the Universe as a whole, emphasizing that galaxies of all types are contributing, proportionally, to the global increase in SFRD in the Universe back to these redshifts (abridged)., Published 2009 in ApJ, 694, 1099
Published: 2009

32. The zCOSMOS redshift survey : Influence of luminosity, mass and environment on the galaxy merger rate

Author: Ravel, L., Kampczyk, P., Le Fèvre, O., Lilly, S. J., Tasca, L., Tresse, L., Lopez-Sanjuan, C., Bolzonella, M., Kovac, K., Abbas, U., Bardelli, S., Bongiorno, A., Caputi, K., Contini, T., Coppa, G., Cucciati, O., La Torre, S., Dunlop, J. S., Franzetti, P., Garilli, B., Iovino, A., Kneib, J. -P, Koekemoer, A. M., Knobel, C., Lamareille, F., Le Borgne, J. -F, Le Brun, V., Leauthaud, A., Maier, C., Mainieri, V., Mignoli, M., Pello, R., Peng, Y., Perez Montero, E., Ricciardelli, E., Scodeggio, M., Silverman, J. D., Tanaka, M., Vergani, D., Zamorani, G., Zucca, E., Bottini, D., Cappi, A., Carollo, C. M., Cassata, P., Cimatti, A., Marco Fumana, Guzzo, L., Maccagni, D., Marinoni, C., Mccracken, H. J., Memeo, P., Meneux, B., Oesch, P., Porciani, C., Pozzetti, L., Renzini, A., Scaramella, R., Scarlata, C., Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Astrophysics - Cosmology and Extragalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, [INFO]Computer Science [cs], Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The contribution of major mergers to galaxy mass assembly along cosmic time is an important ingredient to the galaxy evolution scenario. We aim to measure the evolution of the merger rate for both luminosity/mass selected galaxy samples and investigate its dependence with the local environment. We use a sample of 10644 spectroscopically observed galaxies from the zCOSMOS redshift survey to identify pairs of galaxies destined to merge, using only pairs for which the velocity difference and projected separation of both components with a confirmed spectroscopic redshift indicate a high probability of merging. We have identified 263 spectroscopically confirmed pairs with r_p^{max} = 100 h^{-1} kpc. We find that the density of mergers depends on luminosity/mass, being higher for fainter/less massive galaxies, while the number of mergers a galaxy will experience does not depends significantly on its intrinsic luminosity but rather on its stellar mass. We find that the pair fraction and merger rate increase with local galaxy density, a property observed up to redshift z=1. We find that the dependence of the merger rate on the luminosity or mass of galaxies is already present up to redshifts z=1, and that the evolution of the volumetric merger rate of bright (massive) galaxies is relatively flat with redshift with a mean value of 3*10^{-4} (8*10^{-5} respectively) mergers h^3 Mpc^{-3} Gyr^{-1}. The dependence of the merger rate with environment indicates that dense environments favors major merger events as can be expected from the hierarchical scenario. The environment therefore has a direct impact in shapping-up the mass function and its evolution therefore plays an important role on the mass growth of galaxies along cosmic time., Comment: submitted to A&A, 17 pages, 12 figures

33. The Dependence of Star Formation Activity on Stellar Mass Surface Density and Sersic Index in zCOSMOS Galaxies at 0.5 <z <0.9 Compared with SDSS Galaxies at 0.04 <z <0.08

Author: M. T. Sargent, D. Bottini, Daniela Vergani, P. Franzetti, Olga Cucciati, Andrea Cimatti, A. Iovino, Simon J. Lilly, Christian Maier, A. Cappi, J. F. Le Borgne, S. de la Torre, Christian Marinoni, Karina Caputi, C. Knobel, U. Abbas, L. de Ravel, Y. Peng, E. Ricciardelli, Alvio Renzini, C. Halliday, M. Scodeggio, Claudia Scarlata, V. Le Brun, M. Mignoli, Angela Bongiorno, Anton M. Koekemoer, Pascal Oesch, A. Leauthaud, S. Bardelli, Cristiano Porciani, P. Kampczyk, Laurence Tresse, Lidia Tasca, Thierry Contini, B. Meneux, Paolo Cassata, Masayuki Tanaka, Bianca Garilli, P. Memeo, V. Mainieri, Roser Pello, Lucia Pozzetti, C. M. Carollo, O. Le Fèvre, M. Bolzonella, G. Zamorani, John D. Silverman, Jean-Paul Kneib, E. Perez Montero, H. J. McCracken, Graziano Coppa, D. Maccagni, E. Zucca, Luigi Guzzo, F. Lamareille, M. Fumana, Roberto Scaramella, K. Kovac, INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Astronomy, Maier C., Lilly S. J., Zamorani G., Scodeggio M., Lamareille F., Contini T., Sargent M. T., Scarlata C., Oesch P., Carollo C. M., Le Fèvre O., Renzini A., Kneib J.-P., Mainieri V., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Kova&#269, K., Le Borgne J.-F., Le Brun V., Mignoli M., Pello R., Peng Y., Montero E. Perez, Ricciardelli E., Silverman J. D., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Fumana M., Guzzo L., Halliday C., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Porciani C., Pozzetti L., and Scaramella R.
Subjects: Surface (mathematics), 010504 meteorology & atmospheric sciences, Stellar mass, Population, PHYSICAL-PROPERTIES, POPULATION SYNTHESIS, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, galaxies: high-redshift, 0103 physical sciences, Galaxy formation and evolution, 10. No inequality, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, LOCAL UNIVERSE, Physics, EVOLUTION SURVEY COSMOS, REDSHIFT SURVEY, education.field_of_study, Galaxies: evolution, Galaxies: high-redshift, Astronomy and Astrophysics, Space and Planetary Science, FORMING GALAXIES, Star formation, ASSEMBLY HISTORY, DISK GALAXIES, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, LUMINOSITY FUNCTION, DIGITAL SKY SURVEY, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], galaxies: evolution, Surface mass, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: One of the key unanswered questions in the study of galaxy evolution is what physical processes inside galaxies drive the changes in the SFRs in individual galaxies that, taken together, produce the large decline in the global star-formation rate density (SFRD) to redshifts since z~2. Many studies of the SFR at intermediate redshifts have been made as a function of the integrated stellar mass of galaxies but these did not use information on the internal structural properties of the galaxies. In this paper we present a comparative study of the dependence of SFRs on the average surface mass densities (SigmaM) of galaxies of different morphological types up to z~1 using the zCOSMOS and SDSS surveys. The main findings about the evolution of these relatively massive galaxies are: 1) There is evidence that, for both SDSS ans zCOSMOS galaxies, the mean specific SFR within a given population (either disk-dominated or bulge-dominated) is independent of SigmaM; 2) The observed SSFR - SigmaM step-function relation is due, at all investigated redshifts, to the changing mix of disk-dominated and bulge-dominated galaxies as surface density increases and the strong difference in the average SSFR between disks and bulges. We also find a modest differential evolution in the size-mass relations of disk and spheroid galaxies; 3) The shape of the median SSFR - SigmaM relation is similar, but with median SSFR values that are about 5-6 times higher in zCOSMOS galaxies than for SDSS, across the whole range of SigmaM, and in both spheroid and disk galaxies. This increase matches that of the global SFRD of the Universe as a whole, emphasizing that galaxies of all types are contributing, proportionally, to the global increase in SFRD in the Universe back to these redshifts (abridged)., Comment: Published 2009 in ApJ, 694, 1099
Published: 2009
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34. The zCOSMOS redshift survey : evolution of the light in bulges and discs since z ~ 0.8

Author: Luis C. Ho, O. Le Fevre, H. J. McCracken, P. Franzetti, Anton M. Koekemoer, R. Pello, E. Zucca, A. Cappi, A. Cattaneo, Niraj Welikala, A. Iovino, K. Kovavc, Alvio Renzini, J. F. Le Borgne, R. M. Rich, M. Mignoli, B. Garilli, T. Contini, Yoshiaki Taniguchi, Graziano Coppa, Jean-Paul Kneib, Masaomi Tanaka, C. Lopez-Sanjuan, E. Perez Montero, P. Kampczyk, Vincenzo Mainieri, Andrea Cimatti, F. Lamareille, Richard Massey, Marco Scodeggio, Angela Bongiorno, Rongmon Bordoloi, Y. Peng, L. Tresse, L. A. M. Tasca, C. Knobel, S. Bardelli, Duncan Farrah, Kartik Sheth, Christian Maier, D. Vergani, Michele Moresco, O. Cucciati, S. de la Torre, K. Caputi, C. M. Carollo, M. Bolzonella, Lucia Pozzetti, G. Zamorani, C. T. Liu, D. B. Sanders, Simon J. Lilly, Luigi Guzzo, V. Le Brun, O. Ilbert, Astronomy, Tasca, L.A.M., Tresse, L., Le Fèvre, O., Ilbert, O., Lilly, S.J., Zamorani, G., López-Sanjuan, C., Ho, L.C., Bardelli, S., Cattaneo, A., Cucciati, O., Farrah, D., Iovino, A., Koekemoer, A.M., Liu, C.T., Massey, R., Renzini, A., Taniguchi, Y., Welikala, N., Zucca, E., Carollo, C.M., Contini, T., Kneib, J.-P., Mainieri, V., Scodeggio, M., Bolzonella, M., Bongiorno, A., Caputi, K., De La Torre, S., Franzetti, P., Garilli, B., Guzzo, L., Kampczyk, P., Knobel, C., Kovač, K., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Maier, C., Mignoli, M., Pello, R., Peng, Y., Perez Montero, E., Rich, R.M., Tanaka, M., Vergani, D., Bordoloi, R., Cappi, A., Cimatti, A., Coppa, G., Mccracken, H.J., Moresco, M., Pozzetti, L., Sanders, D., and Sheth, K.
Subjects: Galaxies: fundamental parameter, FORMING GALAXY, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, MASS, fundamental parameters. [Galaxies], LUMINOSITY FUNCTIONS, galaxies: bulges, STAR-FORMATION RATE, Luminosity, ADVANCED CAMERA, bulges [Galaxies], Bulge, distances and redshifts [Galaxies], Galaxies: distances and redshift, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Galaxy Astrophysics, Physics, FORMATION HISTORY, Star formation, Astronomy and Astrophysics, galaxies: fundamental parameters, HUBBLE-SPACE-TELESCOPE, VLT DEEP SURVEY, Astronomy and Astrophysic, Redshift survey, evolution [Galaxies], Astrophysics - Astrophysics of Galaxies, luminosity function [Galaxies], Redshift, Galaxy, Stars, galaxies: luminosity function, Space and Planetary Science, mass function, Astrophysics of Galaxies (astro-ph.GA), galaxies: luminosity function, mass function, Astrophysics::Earth and Planetary Astrophysics, GALAXY FORMATION, galaxies: distances and redshifts, Irregular galaxy, galaxies: evolution, Galaxies: bulge, SURVEY COSMOS
Abstract: We studied the chronology of galactic bulge and disc formation by analysing the relative contributions of these components to the B-band rest-frame luminosity density at different epochs. We present the first estimate of the evolution of the fraction of rest-frame B-band light in galactic bulges and discs since redshift z~0.8. We performed a bulge-to-disc decomposition of HST/ACS images of 3266 galaxies in the zCOSMOS-bright survey with spectroscopic redshifts in the range 0.7 < z < 0.9. We find that the fraction of B-band light in bulges and discs is $(26 \pm 4)%$ and $(74 \pm 4)%$, respectively. When compared with rest-frame B-band measurements of galaxies in the local Universe in the same mass range ($10^{9} M_{\odot}\lessapprox M \lessapprox 10^{11.5} M_{\odot}$), we find that the B-band light in discs decreases by ~30% from z~0.7-0.9 to z~0, while the light from the bulge increases by ~30% over the same period of time. We interpret this evolution as the consequence of star formation and mass assembly processes, as well as morphological transformation, which gradually shift stars formed at half the age of the Universe from star-forming late-type/irregular galaxies toearlier types and ultimately into spheroids., Letter to the Editor, 4 pages, 2 figures, accepted for publication in Astronomy and Astrophysics
Published: 2014

35. The dependence of Galactic outflows on the properties and orientation of zCOSMOS galaxies at z ~ 1

Author: A. Cappi, E. Zucca, Alvio Renzini, Pascal Oesch, Masaomi Tanaka, C. Knobel, V. Presotto, Anton M. Koekemoer, Gianni Zamorani, K. Kovac, P. Nair, S. de la Torre, V. Mainieri, Angela Bongiorno, M. Bolzonella, Jean-Paul Kneib, Lucia Pozzetti, Daniela Vergani, M. Scodeggio, J. F. Le Borgne, A. Iovino, E. Hardmeier, P. Kampczyk, Thierry Contini, B. Garilli, Roser Pello, Rongmon Bordoloi, John D. Silverman, M. Mignoli, O. Le Fèvre, S. Bardelli, Michele Moresco, Andrea Cimatti, V. Le Brun, Lidia Tasca, C. M. Carollo, Christian Maier, P. Franzetti, F. Lamareille, Y. Peng, E. Perez Montero, Olga Cucciati, Karina Caputi, Simon J. Lilly, Laurence Tresse, Graziano Coppa, L. de Ravel, Bordoloi, R., Lilly, S.J., Hardmeier, E., Contini, T., Kneib, J.-P., Fevre, O. Le, Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Carollo, C.M., Cucciati, O., De La Torre, S., De Ravel, L., Garilli, B., Iovino, A., Kampczyk, P., Kovač, K., Knobel, C., Lamareille, F., Borgne, J.-F. Le, Brun, V. Le, Maier, C., Mignoli, M., Oesch, P., Pello, R., Peng, Y., Perez Montero, E., Presotto, V., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., Cappi, A., Cimatti, A., Coppa, G., Franzetti, P., Koekemoer, A., Moresco, M., Nair, P., and Pozzetti, L.
Subjects: Physics, Nuclear and High Energy Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Absorption spectroscopy, Star formation, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Mass loading, ultraviolet: ISM, Galaxy, Spectral line, Orientation (vector space), Space and Planetary Science, galaxies: high-redshift, Astrophysics::Solar and Stellar Astrophysics, intergalactic medium, galaxies: evolution, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present an analysis of cool outflowing gas around galaxies, traced by MgII absorption lines in the co-added spectra of a sample of 486 zCOSMOS galaxies at 1 < z < 1.5. These galaxies span a range of stellar masses (9.45< log[M*/Msun] 5-7 Msun/yr and a mass loading factor (�� = dMout/dt /SFR) comparable to the star formation rates of the galaxies., 12 pages, 14 figures, ApJ submitted
Published: 2013

36. zCOSMOS 20k: Satellite galaxies are the main drivers of environmental effects in the galaxy population at least to z~0.7

Author: Angela Bongiorno, Michele Moresco, G. Zamorani, K. Caputi, E. Pérez Montero, Anton M. Koekemoer, Daniela Vergani, Vincenzo Mainieri, Jean-Paul Kneib, P. Kampczyk, A. Iovino, F. Lamareille, J. F. Le Borgne, Laurence Tresse, John D. Silverman, S. Bardelli, Marco Scodeggio, C. Knobel, V. Presotto, E. Le Floc'h, L. de Ravel, L. A. M. Tasca, E. Zucca, Katarina Kovac, T. J. Bschorr, V. Le Brun, Micol Bolzonella, Alvio Renzini, Pascal Oesch, Yingjie Peng, Lucia Pozzetti, Herve Aussel, P. Franzetti, R. Pello, B. Garilli, O. Le Fevre, M. Mignoli, O. Cucciati, S. de la Torre, Christian Maier, Thierry Contini, C. M. Carollo, Simon J. Lilly, Masayuki Tanaka, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Kovač, K, Lilly, S.J., Knobel, C., Bschorr, T.J., Peng, Y., Carollo, C.M., Contini, T., Kneib, J.-P., Le Févre, O., Mainieri, V., Renzini, A., Scodeggio, M., Zamorani, G., Bardelli, S., Bolzonella, M., Bongiorno, A., Caputi, K., Cucciati, O., de la Torre, S., de Ravel, L., Franzetti, P., Garilli, B., Iovino, A., Kampczyk, P., Lamareille, F., Le Borgne, J.-F., Le Brun, V., Maier, C., Mignoli, M., Oesch, P., Pello, R., Perez Montero, E., Presotto, V., Silverman, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., Aussel, H., Koekemoer, A.M., Le Floc'h, E., Moresco, M., Pozzetti, L., Astronomy, Kapteyn Astronomical Institute, K., Kovac, S. J., Lilly, C., Knobel, T. J., Bschorr, Y., Peng, C. M., Carollo, T., Contini, J. P., Kneib, O., Le Fevre, V., Mainieri, A., Renzini, M., Scodeggio, G., Zamorani, S., Bardelli, M., Bolzonella, A., Bongiorno, K., Caputi, O., Cucciati, S., de la Torre, L., de Ravel, P., Franzetti, B., Garilli, A., Iovino, P., Kampczyk, F., Lamareille, J. F., Le Borgne, V., Le Brun, C., Maier, M., Mignoli, P., Oesch, R., Pello, E. P., Montero, Presotto, Valentina, J., Silverman, M., Tanaka, L., Tasca, L., Tresse, D., Vergani, E., Zucca, H., Aussel, A. M., Koekemoer, E., Le Floc'h, M., Moresco, and L., Pozzetti
Subjects: HUBBLE SEQUENCE, HALO MASS, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmology: observation, Hubble sequence, symbols.namesake, galaxies: groups: general, 0103 physical sciences, Satellite galaxy, statistic [galaxies], education, 010303 astronomy & astrophysics, RED SEQUENCE, evolution [galaxies], Astrophysics::Galaxy Astrophysics, galaxies: statistics, STAR-FORMATION HISTORIES, Physics, REDSHIFT SURVEY, education.field_of_study, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], groups: general [galaxies], 010308 nuclear & particles physics, galaxies: evolution, galaxies: star formation, cosmology: observations, Astronomy, Astronomy and Astrophysics, Redshift survey, observations [cosmology], Galaxy, Redshift, Ram pressure, COSMOS FIELD, RAM PRESSURE, Space and Planetary Science, COLOR-DENSITY RELATION, symbols, DIGITAL SKY SURVEY, STELLAR MASS FUNCTION, star formation [galaxies], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We explore the role of environment in the evolution of galaxies over 0.1, Comment: 22 pages, 19 figures, submitted to MNRAS
Published: 2013
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37. Spot the difference - Impact of different selection criteria on observed properties of passive galaxies in zCOSMOS-20k sample

Author: O. Cucciati, S. J. Lilly, Christian Maier, E. Le Floc'h, D. Vergani, John D. Silverman, C. Lopez-Sanjuan, S. de la Torre, Nick Scoville, F. Lamareille, A. Cappi, A. Cimatti, Luke A. Barnes, Y. Peng, Enrique Perez-Montero, Alvio Renzini, Katarina Kovac, P. Kampczyk, C. M. Carollo, L. A. M. Tasca, J. F. Le Borgne, Masaomi Tanaka, Michele Moresco, Angela Bongiorno, A. Iovino, Pradip Nair, L. de Ravel, V. Presotto, Claudia Scarlata, K. Caputi, E. Zucca, S. Bardelli, T. Contini, G. Zamorani, J. P. Kneib, Niraj Welikala, O. Le Fevre, L. Tresse, Anton M. Koekemoer, Marco Scodeggio, C. Knobel, Rongmon Bordoloi, M. Bolzonella, C. Diener, V. Le Brun, Lucia Pozzetti, B. Garilli, P. Franzetti, Vincenzo Mainieri, Pascal Oesch, R. Pello, M. Mignoli, H. J. McCracken, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Moresco M., Pozzetti L., Cimatti A., Zamorani G., Bolzonella M., Lamareille F., Mignoli M., Zucca E., Lilly S. J., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Scodeggio M., Bardelli S., Bongiorno A., Caputi K., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Kovac K., Le Borgne J.-F., Le Brun V., Maier C., Pelló R., Peng Y., Perez-Montero E., Presotto V., Silverman J. D., Tanaka M., Tasca L., Tresse L., Vergani D., Barnes L., Bordoloi R., Cappi A., Diener C., Koekemoer A. M., Le Floc'h E., López-Sanjuan C., McCracken H. J., Nair P., Oesch P., Scarlata C., Scoville N., Welikala N., and Astronomy
Subjects: ACTIVE GALACTIC NUCLEI, Galaxies: fundamental parameters, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Galaxies: statistics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Sample (material), Population, FOS: Physical sciences, PHYSICAL-PROPERTIES, SPECTRAL ENERGY-DISTRIBUTIONS, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Surveys, 01 natural sciences, 0103 physical sciences, STAR-FORMING GALAXIES, Astrophysics::Solar and Stellar Astrophysics, Emission spectrum, education, PHOTOMETRIC REDSHIFTS, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Selection (genetic algorithm), REDSHIFT SURVEY, Physics, education.field_of_study, 010308 nuclear & particles physics, Star formation, Cosmology: observations, Galaxies: high-redshift, Galaxies: statistics, Large-scale structure of Universe, Galaxies: evolution, Astronomy and Astrophysics, VLT DEEP SURVEY, Galaxy, 13. Climate action, Space and Planetary Science, Outlier, STELLAR MASS FUNCTION, DIGITAL SKY SURVEY, Spectral energy distribution, 10K-BRIGHT SPECTROSCOPIC SAMPLE, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present the analysis of photometric, spectroscopic, and morphological properties for differently selected samples of passive galaxies up to z=1 extracted from the zCOSMOS-20k spectroscopic survey. This analysis intends to explore the dependence of galaxy properties on the selection criterion adopted, study the degree of contamination due to star-forming outliers, and provide a comparison between different commonly used selection criteria. We extracted from the zCOSMOS-20k catalog six different samples of passive galaxies, based on morphology, optical colors, specific star-formation rate, a best fit to the observed spectral energy distribution, and a criterion that combines morphological, spectroscopic, and photometric information. The morphological sample has the higher percentage of contamination in colors, specific star formation rate and presence of emission lines, while the red & passive ETGs sample is the purest, with properties mostly compatible with no star formation activity; however, it is also the less economic criterion in terms of information used. The best performing among the other criteria are the red SED and the quiescent ones, providing a percentage of contamination only slightly higher than the red & passive ETGs criterion (on average of a factor of ~2) but with absolute values of the properties of contaminants still compatible with a red, passively evolving population. We also provided two revised definitions of early type galaxies based on restframe color-color and color-mass criteria, that better reproduce the observed bimodalities. The analysis of the number densities shows evidences of mass-assembly downsizing, with galaxies at 10.25, Comment: 20 pages, 14 figures, 2 tables, accepted for publication in A\&A
Published: 2013
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38. ENVIRONMENTAL EFFECTS IN THE INTERACTION AND MERGING OF GALAXIES IN zCOSMOS

Author: P. Kampczyk, S. J. Lilly, L. de Ravel, O. Le Fèvre, M. Bolzonella, C. M. Carollo, C. Diener, C. Knobel, K. Kovač, C. Maier, A. Renzini, M. T. Sargent, D. Vergani, U. Abbas, S. Bardelli, A. Bongiorno, R. Bordoloi, K. Caputi, T. Contini, G. Coppa, O. Cucciati, S. de la Torre, P. Franzetti, B. Garilli, A. Iovino, J.-P. Kneib, A. M. Koekemoer, F. Lamareille, J.-F. Le Borgne, V. Le Brun, A. Leauthaud, V. Mainieri, M. Mignoli, R. Pello, Y. Peng, E. Perez Montero, E. Ricciardelli, M. Scodeggio, J. D. Silverman, M. Tanaka, L. Tasca, L. Tresse, G. Zamorani, E. Zucca, D. Bottini, A. Cappi, P. Cassata, A. Cimatti, M. Fumana, L. Guzzo, J. Kartaltepe, C. Marinoni, H. J. McCracken, P. Memeo, B. Meneux, P. Oesch, C. Porciani, L. Pozzetti, R. Scaramella, AUTRES, Institute for Astronomy [Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), University of Chicago, Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astrofisico di Torino (OATo), College of Computing (GATECH), Georgia Institute of Technology [Atlanta], Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut de recherche en astrophysique et planétologie (IRAP), California Institute of Technology (CALTECH), European Southern Observatory (ESO), Hunan Normal University (HNU), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), National Optical Astronomy Observatory (NOAO), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Astronomy, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Hunan Normal University, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Kampczyk P., Lilly S. J., de Ravel L., Le Fèvre O., Bolzonella M., Carollo C. M., Diener C., Knobel C., Kovac K., Maier C., Renzini A., Sargent M. T., Vergani D., Abbas U., Bardelli S., Bongiorno A., Bordoloi R., Caputi K., Contini T., Coppa G., Cucciati O., de la Torre S., Franzetti P., Garilli B., Iovino A., Kneib J.-P., Koekemoer A. M., Lamareille F., Le Borgne J.-F., Le Brun V., Leauthaud A., Mainieri V., Mignoli M., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Scodeggio M., Silverman J. D., Tanaka M., Tasca L., Tresse L., Zamorani G., Zucca E., Bottini D., Cappi A., Cassata P., Cimatti A., Fumana M., Guzzo L., Kartaltepe J., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Pozzetti L., and Scaramella R.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010504 meteorology & atmospheric sciences, Population, FOS: Physical sciences, galaxies: starburst, MORPHOLOGICAL TRANSFORMATION, Astrophysics, Kinematics, Astrophysics::Cosmology and Extragalactic Astrophysics, STAR-FORMATION RATES, MERGER RATE EVOLUTION, 01 natural sciences, SIMILAR-TO 1, galaxies: evolution, galaxies: general, galaxies: interactions, Astronomy and Astrophysics, Space and Planetary Science, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Fraction (mathematics), education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, QB, Physics, education.field_of_study, FORMATION HISTORY, Star formation, CLOSE PAIRS, Cosmology: observations, Galaxies: high-redshift, Galaxies: statistics, Large-scale structure of Universe, CNOC2 REDSHIFT SURVEY, DISK GALAXIES, Environmental variation, Galaxy, Redshift, COSMOS FIELD, DIGITAL SKY SURVEY, Irregular galaxy, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: (Abridged) We analyze the environments and galactic properties (morphologies and star-formation histories) of a sample of 153 close kinematic pairs in the redshift range 0.2 < z < 1 identified in the zCOSMOS-bright 10k spectroscopic sample of galaxies. Correcting for projection effects, the fraction of close kinematic pairs is three times higher in the top density quartile than in the lowest one. This translates to a three times higher merger rate because the merger timescales are shown, from mock catalogues based on the Millennium simulation, to be largely independent of environment once the same corrections for projection is applied. We then examine the morphologies and stellar populations of galaxies in the pairs, comparing them to control samples that are carefully matched in environment so as to remove as much as possible the well-known effects of environment on the properties of the parent population of galaxies. Once the environment is properly taken into account in this way, we find that the early-late morphology mix is the same as for the parent population, but that the fraction of irregular galaxies is boosted by 50-75%, with a disproportionate increase in the number of irregular-irregular pairs (factor of 4-8 times), due to the disturbance of disk galaxies. Future dry-mergers, involving elliptical galaxies comprise less than 5% of all close kinematic pairs. In the closest pairs, there is a boost in the specific star-formation rates of star-forming galaxies of a factor of 2-4, and there is also evidence for an increased incidence of post star-burst galaxies. Although significant for the galaxies involved, the "excess" star-formation associated with pairs represents only about 5% of the integrated star-formation activity in the parent sample. Although most pair galaxies are in dense environments, the effects of interaction appear to be largest in the lower density environments., 38 pages, 17 figures, submitted to ApJ
Published: 2013
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39. The zCOSMOS 20k Group Catalog

Author: P. Kampczyk, Laurence Tresse, Rongmon Bordoloi, R. Pello, J. F. Le Borgne, Michele Moresco, V. Le Brun, Anton M. Koekemoer, Andrea Cimatti, Lidia Tasca, S. de la Torre, C. López-Sanjuan, Graziano Coppa, A. Iovino, Christian Maier, Y. Peng, Niraj Welikala, Bianca Garilli, E. Zucca, Thierry Contini, T. J. Bschorr, Daniela Vergani, M. Mignoli, F. Lamareille, G. Zamorani, Olga Cucciati, V. Mainieri, C. M. Carollo, M. Bolzonella, E. Perez Montero, Jean-Paul Kneib, Preethi Nair, M. Scodeggio, S. Lilly, P. Franzetti, S. Bardelli, C. Knobel, H. J. McCracken, A. Cappi, Luke A. Barnes, K. Kovac, Alvio Renzini, L. de Ravel, Masayuki Tanaka, Karina Caputi, Pascal Oesch, O. Le Fèvre, V. Presotto, Lucia Pozzetti, Angela Bongiorno, John D. Silverman, Astronomy, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Knobel C., Lilly S. J., Iovino A., Kova&#269, K., Bschorr T. J., Presotto V., Oesch P. A., Kampczyk P., Carollo C. M., Contini T., Kneib J.-P., Le Fevre O., Mainieri V., Renzini A., Scodeggio M., Zamorani G., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Perez Montero E., Silverman J., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Barnes L., Bordoloi R., Cappi A., Cimatti A, Coppa G., Koekemoer A. M., López-Sanjuan C., McCracken H. J., Moresco M., Nair P., Pozzetti L., and Welikala N.
Subjects: ACTIVE GALACTIC NUCLEI, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, SIMILAR-TO 1, Gravitational potential, GALAXY REDSHIFT SURVEY, galaxies: groups: general, 0103 physical sciences, Satellite galaxy, [INFO]Computer Science [cs], 010303 astronomy & astrophysics, PHOTOMETRIC REDSHIFTS, ComputingMilieux_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, Physics, large-scale structure of universe, MASS FUNCTION, COSMIC cancer database, 010308 nuclear & particles physics, Group (mathematics), Astronomy and Astrophysics, VLT DEEP SURVEY, Billion years, methods: data analysis, Galaxy, Redshift, EVOLUTION, COSMOS FIELD, catalogs, cosmology: observations, galaxies: evolution, galaxies: groups: general, large-scale structure of universe, methods: data analysis, STELLAR, GROUP ENVIRONMENT, Space and Planetary Science, cosmology: observations, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], galaxies: evolution, Cosmic time, catalogs, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present an optical group catalog between 0.1 < z < 1 based on 16,500 high-quality spectroscopic redshifts in the completed zCOSMOS-bright survey. The catalog published herein contains 1498 groups in total and 192 groups with more than five observed members. The catalog includes both group properties and the identification of the member galaxies. Based on mock catalogs, the completeness and purity of groups with three and more members should be both about 83% with respect to all groups that should have been detectable within the survey, and more than 75% of the groups should exhibit a one-to-one correspondence to the "real" groups. Particularly at high redshift, there are apparently more galaxies in groups in the COSMOS field than expected from mock catalogs. We detect clear evidence for the growth of cosmic structure over the last seven billion years in the sense that the fraction of galaxies that are found in groups (in volume-limited samples) increases significantly with cosmic time. In the second part of the paper, we develop a method for associating galaxies that only have photo-z to our spectroscopically identified groups. We show that this leads to improved definition of group centers, improved identification of the most massive galaxies in the groups, and improved identification of central and satellite galaxies, where we define the former to be galaxies at the minimum of the gravitational potential wells. Subsamples of centrals and satellites in the groups can be defined with purities up to 80%, while a straight binary classification of all group and non-group galaxies into centrals and satellites achieves purities of 85% and 75%, respectively, for the spectroscopic sample., 26 pages, 21 figures, published in ApJ (along with machine-readable tables)
Published: 2012
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40. The Radial and Azimuthal Profiles of Mg II Absorption around 0.5 \lt z \lt 0.9 zCOSMOS Galaxies of Different Colors, Masses, and Environments

Author: Masayuki Tanaka, Niraj Welikala, M. Scodeggio, H. J. McCracken, F. Lamareille, Anton M. Koekemoer, C. Diener, Italo Balestra, O. Le Fèvre, P. Franzetti, Thierry Contini, Jean-Paul Kneib, G. Zamorani, P. Kampczyk, E. Zucca, R. Pello, C. López-Sanjuan, E. Perez Montero, Angela Bongiorno, Simon J. Lilly, Preethi Nair, Rongmon Bordoloi, Lucia Pozzetti, Karina Caputi, John D. Silverman, Bianca Garilli, S. de la Torre, Michele Moresco, Lidia Tasca, Laurence Tresse, J. F. Le Borgne, M. Mignoli, Daniela Vergani, C. Knobel, S. Bardelli, K. Kovac, Yingjie Peng, Claudia Scarlata, V. Le Brun, Luke A. Barnes, Christian Maier, V. Mainieri, M. Bolzonella, V. Presotto, A. Cappi, Alvio Renzini, Pascal Oesch, A. Iovino, Olga Cucciati, Andrea Cimatti, L. de Ravel, Graziano Coppa, C. M. Carollo, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Bordoloi R., Lilly S. J., Knobel C., Bolzonella M., Kampczyk P., Carollo C. M., Iovino A., Zucca E., Contini T., Kneib J.-P., Le Fevre O., Mainieri V., Renzini A., Scodeggio M., Zamorani G., Balestra I., Bardelli S., Bongiorno A., Caputi K., Cucciati O., de la Torre S., de Ravel L., Garilli B., Kova&#269, K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Perez Montero E., Presotto V., Scarlata C., Silverman J., Tanaka M., Tasca L., Tresse L., Vergani D., Barnes L., Cappi A., Cimatti A., Coppa G., Diener C., Franzetti P., Koekemoer A., López-Sanjuan C., McCracken H. J., Moresco M., Nair P., Oesch P., Pozzetti L., and Welikala N.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Computer Science::Computational Geometry, Rotation, 01 natural sciences, galaxies: groups: general, galaxies: high-redshift, Bipolar outflow, 0103 physical sciences, [INFO]Computer Science [cs], Absorption (electromagnetic radiation), ISM: jets and outflow, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Redshift, Galaxy, quasars: absorption lines, ISM: jets and outflows, Space and Planetary Science, intergalactic medium, Impact parameter, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Equivalent width, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We map the radial and azimuthal distribution of Mg II gas within 200 kpc (physical) of 4000 galaxies at redshifts 0.5 < z < 0.9 using co-added spectra of more than 5000 background galaxies at z > 1. We investigate the variation of Mg II rest frame equivalent width as a function of the radial impact parameter for different subsets of foreground galaxies selected in terms of their rest-frame colors and masses. Blue galaxies have a significantly higher average Mg II equivalent width at close galactocentric radii as compared to the red galaxies. Amongst the blue galaxies, there is a correlation between Mg II equivalent width and galactic stellar mass of the host galaxy. We also find that the distribution of Mg II absorption around group galaxies is more extended than that for non-group galaxies, and that groups as a whole have more extended radial profiles than individual galaxies. Interestingly, these effects can be satisfactorily modeled by a simple superposition of the absorption profiles of individual member galaxies, assuming that these are the same as those of non-group galaxies, suggesting that the group environment may not significantly enhance or diminish the Mg II absorption of individual galaxies. We show that there is a strong azimuthal dependence of the Mg II absorption within 50 kpc of inclined disk-dominated galaxies, indicating the presence of a strongly bipolar outflow aligned along the disk rotation axis. There is no significant dependence of Mg II absorption on the apparent inclination angle of disk-dominated galaxies., 14 pages, Accepted for publication in ApJ; new section on inclination dependence added; Figure 4:- new panel added
Published: 2011
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41. Black hole accretion and host galaxies of obscured quasars in XMM-COSMOS

Author: Jonathan R. Trump, John D. Silverman, E. Le Floc'h, Günther Hasinger, Daniela Vergani, V. Le Brun, Fabrizio Fiore, S. Bardelli, E. Zucca, Masayuki Tanaka, Chris Impey, Olivier Ilbert, Martin Elvis, Marcella Brusa, Laurence Tresse, Kazushi Iwasawa, F. Lamareille, V. Mainieri, M. Carollo, E. Perez Montero, Karina Caputi, Y. Peng, Jean-Paul Kneib, P. Kampczyk, Lucia Pozzetti, S. de la Torre, Preethi Nair, Yoshiaki Taniguchi, R. Pello, Peter Capak, Roberto Gilli, J. F. Le Borgne, Nico Cappelluti, M. Scodeggio, Anton M. Koekemoer, Andrea Comastri, Christian Maier, Andrea Merloni, P. Franzetti, Angela Bongiorno, C. Knobel, Graziano Coppa, Gianni Zamorani, Olga Cucciati, Elisabeta Lusso, K. Kovac, Herve Aussel, Micol Bolzonella, Lidia Tasca, E. Ricciardelli, L. de Ravel, A. Iovino, Monique Aller, C. Halliday, M. Mignoli, Alvio Renzini, S. J. Lilly, Cristian Vignali, Italo Balestra, Bianca Garilli, Thierry Contini, Mara Salvato, N. Z. Scoville, O. Le Fèvre, Mainieri V., Bongiorno A., Merloni A., Aller M., Carollo M., Iwasawa K., Koekemoer A. M., Mignoli M., Silverman J. D., Bolzonella M., Brusa M., Comastri A., Gilli R., Halliday C., Ilbert O., Lusso E., Salvato M., Vignali C., Zamorani G., Contini T., Kneib J.-P., Le Fevre O., Lilly S., Renzini A., Scodeggio M., Balestra I., Bardelli S., Caputi K., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Kovac K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Nair P., Pello R., Peng Y., Perez Montero E., Pozzetti L., Ricciardelli E., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Aussel H., Capak P., Cappelluti N., Elvis M., Fiore F., Hasinger G., Impey C., Le Floc'h E., Scoville N., Taniguchi Y., Trump J., Astronomy, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: QSOS, ACTIVE GALACTIC NUCLEI, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, galaxies: active, galaxies: nuclei, galaxies: star formation, quasars: general, X-rays: general, EARLY DATA RELEASE, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, SPECTRAL ENERGY-DISTRIBUTIONS, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy merger, 01 natural sciences, POWERFUL RADIO GALAXIES, 0103 physical sciences, Galaxy formation and evolution, STAR-FORMING GALAXIES, Astrophysics::Solar and Stellar Astrophysics, [INFO]Computer Science [cs], STELLAR MASS DENSITY, DEEP FIELD-SOUTH, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Quasar, HUBBLE-SPACE-TELESCOPE, Galaxy, Accretion (astrophysics), Redshift, Space and Planetary Science, X-RAY-ABSORPTION, DIGITAL SKY SURVEY, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We explore the connection between black hole growth at the center of obscured quasars selected from the XMM-COSMOS survey and the physical properties of their host galaxies. We study a bolometric regime ( 8 x 10^45 erg/s) where several theoretical models invoke major galaxy mergers as the main fueling channel for black hole accretion. We confirm that obscured quasars mainly reside in massive galaxies (Mstar>10^10 Msun) and that the fraction of galaxies hosting such powerful quasars monotonically increases with the stellar mass. We stress the limitation of the use of rest-frame color-magnitude diagrams as a diagnostic tool for studying galaxy evolution and inferring the influence that AGN activity can have on such a process. We instead use the correlation between star-formation rate and stellar mass found for star-forming galaxies to discuss the physical properties of the hosts. We find that at z ~1, ~62% of Type-2 QSOs hosts are actively forming stars and that their rates are comparable to those measured for normal star-forming galaxies. The fraction of star-forming hosts increases with redshift: ~71% at z ~2, and 100% at z ~3. We also find that the the evolution from z ~1 to z ~3 of the specific star-formation rate of the Type-2 QSO hosts is in excellent agreement with that measured for star-forming galaxies. From the morphological analysis, we conclude that most of the objects are bulge-dominated galaxies, and that only a few of them exhibit signs of recent mergers or disks. Finally, bulge-dominated galaxies tend to host Type-2 QSOs with low Eddington ratios (lambda 0.1)., Accepted by A&A. 20 pages, 16 figures, 2 tables. A version with higher resolution figures and SED fits of Appendix A is available at http://www.eso.org/~vmainier/QSO2/qso2.pdf
Published: 2011
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42. zCOSMOS 10k-bright spectroscopic sample: exploring mass and environment dependence in early-type galaxies

Author: V. Mainieri, Marcella Carollo, E. Zucca, Michele Moresco, J. F. Le Borgne, Andrea Cimatti, L. de Ravel, A. Cappi, Micol Bolzonella, Lidia Tasca, F. Lamareille, S. Bardelli, Simon J. Lilly, P. Oesch, P. Memeo, U. Abbas, A. Iovino, Alvio Renzini, Cristiano Porciani, Y. Peng, M. Mignoli, E. Ricciardelli, O. Le Fèvre, C. Halliday, Jean-Paul Kneib, D. Maccagni, P. Franzetti, C. Knobel, Graziano Coppa, Gianni Zamorani, Masaomi Tanaka, Anton M. Koekemoer, A. Leauthaud, D. Bottini, Daniela Vergani, Laurence Tresse, Olga Cucciati, Lucia Pozzetti, E. Perez Montero, S. de la Torre, Angela Bongiorno, Bianca Garilli, B. Meneux, Christian Maier, Luigi Guzzo, Christian Marinoni, John D. Silverman, P. Kampczyk, Roberto Scaramella, R. Pello, M. Scodeggio, K. Kovac, Thierry Contini, H. J. McCracken, Preethi Nair, S. Di Cesare, Karina Caputi, Nick Scoville, Claudia Scarlata, V. Le Brun, Paolo Cassata, Moresco M., Pozzetti L., Cimatti A., Zamorani G., Mignoli M., di Cesare S., Bolzonella M., Zucca E., Lilly S., Kova&#269, K., Scodeggio M., Cassata P., Tasca L., Vergani D., Halliday C., Carollo M., Contini T., Kneib J.-P., Le Févre O., Mainieri V., Renzini A., Bardelli S., Bongiorno A., Caputi K., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Pellò R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Tresse L., Abbas U., Bottini D., Cappi A., Guzzo L., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Nair P., Oesch P., Porciani C., Scaramella R., Scarlata C., Scoville N., Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Measure (mathematics), surveys, 0103 physical sciences, Range (statistics), Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, [INFO]Computer Science [cs], 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, galaxies: statistics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, galaxies: fundamental parameters, Sample (graphics), Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Early type, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Equivalent width
Abstract: We present the analysis of the U-V rest-frame color distribution and some spectral features as a function of mass and environment for two sample of early-type galaxies up to z=1 extracted from the zCOSMOS spectroscopic survey. The first sample ("red galaxies") is defined with a photometric classification, while the second ("ETGs") by combining morphological, photometric, and spectroscopic properties to obtain a more reliable sample. We find that the color distribution of red galaxies is not strongly dependent on environment for all mass bins, with galaxies in overdense regions redder than galaxies in underdense regions with a difference of 0.027\pm0.008 mag. The dependence on mass is far more significant, with average colors of massive galaxies redder by 0.093\pm0.007 mag than low-mass galaxies throughout the entire redshift range. We study the color-mass relation, finding a mean slope 0.12\pm0.005, while the color-environment relation is flatter, with a slope always smaller than 0.04. The spectral analysis that we perform on our ETGs sample is in good agreement with our photometric results: we find for D4000 a dependence on mass between high and low-mass galaxies, and a much weaker dependence on environment (respectively a difference of of 0.11\pm0.02 and of 0.05\pm0.02); for the equivalent width of H{\delta}we measure a difference of 0.28\pm0.08 {\AA}across the same mass range and no significant dependence on environment.By analyzing the lookback time of early-type galaxies, we support the possibility of a downsizing scenario, in which massive galaxies with a stronger D4000 and an almost constant equivalent width of $H\delta$ formed their mass at higher redshift than lower mass ones. We also conclude that the main driver of galaxy evolution is the galaxy mass, the environment playing a subdominant role., Comment: 12 pages, 12 figures, accepted for publication on Astronomy and Astrophysics
Published: 2010
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43. Ultraluminous X-ray sources out to z ~ 0.3 in the COSMOS field

Author: Angela Bongiorno, O. Le Fèvre, John D. Silverman, N. Z. Scoville, P. Franzetti, Anton M. Koekemoer, Olga Cucciati, E. Zucca, Simonetta Puccetti, C. Knobel, Thierry Contini, S. Bardelli, Bianca Garilli, Giuseppina Fabbiano, G. Zamorani, Antonella Fruscione, L. de Ravel, E. Perez Montero, Jonathan R. Trump, Nico Cappelluti, Andrea Merloni, Mara Salvato, Cristian Vignali, M. Scodeggio, J. P. Kneib, K. Kovac, Alvio Renzini, Lidia Tasca, Y. Peng, S. de la Torre, Peter Capak, Alexis Finoguenov, Graziano Coppa, Francesca Civano, Roberto Gilli, Tom Aldcroft, Fabrizio Fiore, P. Kampczyk, V. Mainieri, F. Lamareille, Monique Aller, Chris Impey, R. Pello, Andrea Comastri, M. Bolzonella, M. Mignoli, Laurence Tresse, Martin Elvis, M. Carollo, Yoshiaki Taniguchi, Simon J. Lilly, Claudia Scarlata, Masayuki Tanaka, Karina Caputi, V. Le Brun, E. Ricciardelli, Christian Maier, Olivier Ilbert, Marcella Brusa, A. Iovino, J. F. Le Borgne, Daniela Vergani, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Astronomy, Mainieri V., Vignali C., Merloni A., Civano F., Puccetti S., Brusa M., Gilli R., Bolzonella M., Comastri A., Zamorani G., Aller M., Carollo M., Scarlata C., Elvis M., Aldcroft T.L., Cappelluti N., Fabbiano G., Finoguenov A., Fiore F., Fruscione A., Koekemoer A.M., Contini T., Kneib J.P., Le Fevre O., Lilly S., Renzini A., Scodeggio M., Bardelli S., Bongiorno A., Caputi K., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Knobel C., Kovac K., Lamareille F., Le Borgne J.F., Le Brun V., Maier C., Mignoli M., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J.D., Tanaka M., Tasca L., Tresse L., Vergani D., Zucca E., Capak P., Ilbert O., Impey C., Salvato M., Scoville S., Taniguchi Y., and Trump L.
Subjects: X-rays: galaxies – X-rays: binaries – X-rays: general – surveys, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Field (physics), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, X-rays: general, 01 natural sciences, X-rays: binaries, surveys, 0103 physical sciences, [INFO]Computer Science [cs], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Star formation, X-ray, Astronomy and Astrophysics, Redshift, Galaxy, Early type, X-rays: galaxies, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Using Chandra observations we have identified a sample of seven off-nuclear X-ray sources, in the redshift range z=0.072-0.283, located within optically bright galaxies in the COSMOS Survey. Using the multi-wavelength coverage available in the COSMOS field, we study the properties of the host galaxies of these ULXs. In detail, we derived their star formation rate from H_alpha measurements and their stellar masses using SED fitting techniques with the aim to compute the probability to have an off-nuclear source based on the host galaxy properties. We divide the host galaxies in different morphological classes using the available ACS/HST imaging. We find that our ULXs candidates are located in regions of the SFR versus M$_star$ plane where one or more off-nuclear detectable sources are expected. From a morphological analysis of the ACS imaging and the use of rest-frame colours, we find that our ULXs are hosted both in late and early type galaxies. Finally, we find that the fraction of galaxies hosting a ULX ranges from ~0.5% to ~0.2% going from L[0.5-2 keV]=3 x 10^39 erg s^-1 to L[0.5-2 keV]= 2 x 10^40 erg s^-1., Comment: 10 pages, 9 figures, accepted for publication in Astronomy & Astrophysics
Published: 2010
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44. K+a galaxies in the zCOSMOS Survey: Physical properties of systems in their post-starburst phase

Author: D. Vergani, G. Zamorani, S. Lilly, F. Lamareille, C. Halliday, M. Scodeggio, C. Vignali, P. Ciliegi, M. Bolzonella, M. Bondi, K. Kovač, C. Knobel, E. Zucca, K. Caputi, L. Pozzetti, S. Bardelli, M. Mignoli, A. Iovino, C. M. Carollo, T. Contini, J.-P. Kneib, O. Le Fèvre, V. Mainieri, A. Renzini, A. Bongiorno, G. Coppa, O. Cucciati, S. de la Torre, L. de Ravel, P. Franzetti, B. Garilli, P. Kampczyk, J.-F. Le Borgne, V. Le Brun, C. Maier, R. Pello, Y. Peng, E. Perez Montero, E. Ricciardelli, J. D. Silverman, M. Tanaka, L. Tasca, L. Tresse, U. Abbas, D. Bottini, A. Cappi, P. Cassata, A. Cimatti, L. Guzzo, A. M. Koekemoer, A. Leauthaud, D. Maccagni, C. Marinoni, H. J. McCracken, P. Memeo, B. Meneux, P. Oesch, C. Porciani, R. Scaramella, P. Capak, D. Sanders, N. Scoville, Y. Taniguchi, INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), AUTRES, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, INAF- Milano, Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), INAF - Osservatorio Astronomico di Bologna (OABO), Università di Bologna, Dipartimento di Astronomia, INAF - Osservatorio Astronomico di Brera (OAB), University of Chicago, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Dipartimento di Fisica, Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica e Astronomia [Bologna], Glycosciences Laboratory, Imperial College School of Medicine, Tokai University, Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Space Telescope Science Institute (STSci), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Materials & Process technology, Boeing Company [Chicago], California Institute of Technology (CALTECH), Astronomy, Vergani D., Zamorani G., Lilly S.J., Lamareille F., Halliday C., Scodeggio M., Vignali C., Ciliegi P., Bolzonella M., Bondi M., Kovac K., Knobel C., Zucca E., Caputi K., Pozzetti L., Bardelli S., Mignoli M., Iovino A., Carollo C.M., Contini T., Kneib J.-P., Le Fevre O., Mainieri V., Renzini A., Bongiorno A., Coppa G., Cucciati O., de la Torre S., de Ravel L., Franzetti P., Garilli B., Kampczyk P., Le Borgne J.-F., Le Brun V., Maier C., Pello R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J.D., Tanaka M., Tasca L., Tresse L., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Guzzo L., Koekemoer A.M., Leauthaud A., Maccagni D., Marinoni C., McCracken H.J., Memeo P., Meneux B., Oesch P., Porciani C., Scaramella R., Capak P., Sanders D., Scoville N., Taniguchi Y., Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), galaxies: evolution – galaxies: fundamental parameters – galaxies: luminosity function, mass function – cosmology: observations – galaxies: formation, Stellar mass, Formation, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Spectral line, Luminosity, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Phase (matter), 0103 physical sciences, Galaxy formation and evolution, galaxies: formation, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Luminosity function, Spectral properties, Astronomy and Astrophysics, galaxies: fundamental parameters, Galaxies, Fundamental parameters - Galaxies, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Cosmology, galaxies: luminosity function, Observations - Galaxies, Evolution - Galaxies, Luminosity function, mass function, Space and Planetary Science, mass function, Astrophysics of Galaxies (astro-ph.GA), cosmology: observations, galaxies: evolution, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The identities of the main processes triggering and quenching star-formation in galaxies remain unclear. A key stage in evolution, however, appears to be represented by post-starburst galaxies. To investigate their impact on galaxy evolution, we initiated a multiwavelength study of galaxies with k+a spectral features in the COSMOS field. We examine a mass-selected sample of k+a galaxies at z=0.48-1.2 using the spectroscopic zCOSMOS sample. K+a galaxies occupy the brightest tail of the luminosity distribution. They are as massive as quiescent galaxies and populate the green valley in the colour versus luminosity (or stellar mass) distribution. A small percentage (, 17 pages, 9 figures. Accepted for publication in Astronomy and Astrophysics on 09/09/2009 (no changes wrt v1)
Published: 2010
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45. Ongoing and Co-Evolving Star Formation in zCOSMOS Galaxies Hosting Active Galactic Nuclei

Author: J. D. Silverman, F. Lamareille, C. Maier, S. J. Lilly, V. Mainieri, M. Brusa, N. Cappelluti, G. Hasinger, G. Zamorani, M. Scodeggio, M. Bolzonella, T. Contini, C. M. Carollo, K. Jahnke, J.-P. Kneib, O. Le Fèvre, A. Merloni, S. Bardelli, A. Bongiorno, H. Brunner, K. Caputi, F. Civano, A. Comastri, G. Coppa, O. Cucciati, S. de la Torre, L. de Ravel, M. Elvis, A. Finoguenov, F. Fiore, P. Franzetti, B. Garilli, R. Gilli, A. Iovino, P. Kampczyk, C. Knobel, K. Kovač, J.-F. Le Borgne, V. Le Brun, M. Mignoli, R. Pello, Y. Peng, E. Perez Montero, E. Ricciardelli, M. Tanaka, L. Tasca, L. Tresse, D. Vergani, C. Vignali, E. Zucca, D. Bottini, A. Cappi, P. Cassata, M. Fumana, R. Griffiths, J. Kartaltepe, A. Koekemoer, C. Marinoni, H. J. McCracken, P. Memeo, B. Meneux, P. Oesch, C. Porciani, M. Salvato, AUTRES, Human Genetics Center, The University of Texas Health Science Center at Houston (UTHealth), Department of Psychiatry [Pittsburgh], University of Pittsburgh School of Medicine, Pennsylvania Commonwealth System of Higher Education (PCSHE)-Pennsylvania Commonwealth System of Higher Education (PCSHE), INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris - Site de Paris (OP), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Brera (OAB), INAF - Osservatorio Astronomico di Capodimonte (OAC), INAF- Milano, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), University of Chicago, Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Services communs OMP (UMS 831), Max-Planck-Institut für Astrophysik (MPA), Dipartimento di Fisica, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Glycosciences Laboratory, Imperial College School of Medicine, Information Science Laboratory, Tokai University, Japan Atomic Energy Agency, INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Department of Statistics [Oxford], University of Oxford, Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Silverman J. D., Lamareille F., Maier C., Lilly S. J., Mainieri V., Brusa M., Cappelluti N., Hasinger G., Zamorani G., Scodeggio M., Bolzonella M., Contini T., Carollo C. M., Jahnke K., Kneib J.-P., LeFèvre O., Merloni A., Bardelli S., Bongiorno A., Brunner H., Caputi K., Civano F., Comastri A., Coppa G., Cucciati O., de la Torre S., de Ravel L., Elvis M., Finoguenov A., Fiore F., Franzetti P., Garilli B., Gilli R., Iovino A., Kampczyk P., Knobel C., Kovac K., LeBorgne J.-F., LeBrun V., Mignoli M., Pello R., Peng Y., Montero E. Perez, Ricciardelli E., Tanaka M., Tasca L., Tresse L., Vergani D., Vignali C., Zucca E., Bottini D., Cappi A., Cassata P., Fumana M., Griffiths R., Kartaltepe J., Koekemoer A., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Salvato M., Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Università di Bologna, Dipartimento di Astronomia, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), Dipartimento di Astronomia, Universita degli Studi di Bologna, University of Oxford [Oxford], Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Active galactic nucleus, Stellar mass, Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Supermassive black hole, education.field_of_study, Quasars: emission lines, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Star formation, Astrophysics (astro-ph), Galaxies: evolution, Astronomy and Astrophysics, Galaxies: active, galaxies: active – galaxies: evolution – quasars: emission lines – quasars: general – X-rays: galaxies, Accretion (astrophysics), Galaxy, Quasars: general, X-rays: galaxies, Stars, 13. Climate action, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics
Abstract: We present a study of the host galaxies of AGN selected from the zCOSMOS survey to establish if accretion onto supermassive black holes and star formation are explicitly linked up to z~1. We identify 152 galaxies that harbor AGN, based on XMM observations of 7543 galaxies (i, To appear in The Astrophysical Journal; 17 pages; 13 figures (5 color)
Published: 2009

46. The Environments of Active Galactic Nuclei within the zCOSMOS Density Field

Author: O. Cucciati, Pascal Oesch, S. de la Torre, R. Pello, M. Mignoli, P. Kampczyk, C. M. Carollo, F. Lamareille, D. Bottini, Andrea Comastri, J. F. Le Borgne, Graziano Coppa, E. Zucca, E. Ricciardelli, Marco Scodeggio, S. Bardelli, Christian Maier, T. Contini, Knud Jahnke, Mara Salvato, Vincenzo Mainieri, E. Perez Montero, H. J. McCracken, Roberto Gilli, M. Elvis, P. Memeo, Jean-Paul Kneib, Christian Marinoni, Richard E. Griffiths, A. Finoguenov, L. Tresse, P. Franzetti, A. Cappi, Paolo Cassata, D. Vergani, C. Knobel, G. Hasinger, Angela Bongiorno, John D. Silverman, G. Zamorani, L. de Ravel, O. Le Fevre, Francesca Civano, B. Garilli, Y. Peng, Katarina Kovac, V. Le Brun, Nico Cappelluti, Masaomi Tanaka, M. Bolzonella, Cristian Vignali, Karina Caputi, L. A. M. Tasca, Fabrizio Fiore, Hermann Brunner, S. J. Lilly, M. Fumana, Cristiano Porciani, A. Iovino, B. Meneux, Marcella Brusa, Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), European Southern Observatory (ESO), Max-Planck-Institut für Extraterrestrische Physik (MPE), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Universitats-Sternwarte [München], Ludwig-Maximilians-Universität München (LMU), INAF - Osservatorio Astronomico di Brera (OAB), INAF - Osservatorio Astronomico di Roma (OAR), INAF-IASF Milano, Carnegie Mellon University [Pittsburgh] (CMU), Space Telescope Science Institute (STSci), Universita degli Studi di Padova, Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), California Institute of Technology (CALTECH), Silverman J. D., Kovac K., Knobel C., Lilly S., Bolzonella M., Lamareille F., Mainieri V., Brusa M., Cappelluti N., Peng Y., Hasinger G., Zamorani G., Scodeggio M., Contini T., Carollo C. M., Jahnke K., Kneib J.-P., LeFevre O., Bardelli S., Bongiorno A., Brunner H., Caputi K., Civano F., Comastri A., Coppa G., Cucciati O., de la Torre S., de Ravel L., Elvis M., Finoguenov A., Fiore F., Franzetti P., Garilli B., Gilli R., Griffiths R., Iovino A., Kampczyk P., Koekemoer A., LeBorgne J.-F., LeBrun V., Maier C., Mignoli M., Pello R., Perez Montero E., Ricciardelli E., Tanaka M., Tasca L., Tresse L., Vergani D., Vignali C., Zucca E., Bottini D., Cappi A., Cassata P., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Salvato M., AUTRES, Max Planck Institute for Meteorology (MPI-M), Max-Planck-Gesellschaft, Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, University of Chicago, Max-Planck-Institut für Astronomie (MPIA), INAF- Milano, INAF - Osservatorio Astronomico di Capodimonte (OAC), UPRESA, Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2, Department of Statistics [Oxford], University of Oxford [Oxford], Services communs OMP (UMS 831), Glycosciences Laboratory, Imperial College School of Medicine, Information Science Laboratory, Tokai University, Japan Atomic Energy Agency, Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), and Università degli Studi di Padova = University of Padua (Unipd)
Subjects: Active galactic nucleus, Stellar mass, Galaxies: active, Quasars: general, X-rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, Population, galaxies: active, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], quasars: general, 0103 physical sciences, Density field, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, education.field_of_study, 010308 nuclear & particles physics, Star formation, Astrophysics (astro-ph), Significant difference, Redshift survey, Galaxy, Astrophysics::Earth and Planetary Astrophysics, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], galaxies: active – quasars: general – X-rays: galaxies
Abstract: The impact of environment on AGN activity up to z~1 is assessed by utilizing a mass-selected sample of galaxies from the 10k catalog of the zCOSMOS spectroscopic redshift survey. We identify 147 AGN by their X-ray emission as detected by XMM-Newton from a parent sample of 7234 galaxies. We measure the fraction of galaxies with stellar mass M_*>2.5x10^10 Msun that host an AGN as a function of local overdensity using the 5th, 10th and 20th nearest neighbors that cover a range of physical scales (~1-4 Mpc). Overall, we find that AGNs prefer to reside in environments equivalent to massive galaxies with substantial levels of star formation. Specifically, AGNs with host masses between 0.25-1x10^11 Msun span the full range of environments (i.e., field-to-group) exhibited by galaxies of the same mass and rest-frame color or specific star formation rate. Host galaxies having M_*>10^11 Msun clearly illustrate the association with star formation since they are predominantly bluer than the underlying galaxy population and exhibit a preference for lower density regions analogous to SDSS studies of narrow-line AGN. To probe the environment on smaller physical scales, we determine the fraction of galaxies (M_*>2.5x10^10 Msun) hosting AGNs inside optically-selected groups, and find no significant difference with field galaxies. We interpret our results as evidence that AGN activity requires a sufficient fuel supply; the probability of a massive galaxy to have retained some sufficient amount of gas, as evidence by its ongoing star formation, is higher in underdense regions where disruptive processes (i.e., galaxy harrassment, tidal stripping) are lessened., 13 pages; 11 figures; To appear in The Astrophysical Journal
Published: 2009
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47. The zCOSMOS redshift survey: The three-dimensional classification cube and bimodality in galaxy physical properties

Author: Peter Capak, L. de Ravel, Ummi Abbas, Bianca Garilli, P. Kampczyk, Alvio Renzini, Luigi Guzzo, S. de la Torre, M. Fumana, Roberto Scaramella, Pascal Oesch, R. Pello, E. Zucca, M. Mignoli, H. J. McCracken, S. Bardelli, Laurence Tresse, G. Zamorani, D. Bottini, Lidia Tasca, Christian Maier, Thierry Contini, F. Lamareille, Graziano Coppa, P. Memeo, Christian Marinoni, Claudia Scarlata, O. Le Fèvre, V. Le Brun, Paolo Cassata, K. Kovac, Angela Bongiorno, A. Cappi, Alessandro Cimatti, Micol Bolzonella, Simon J. Lilly, Alexie Leauthaud, C. Halliday, Daniela Vergani, Karina Caputi, John D. Silverman, C. M. Carollo, Cristiano Porciani, J. F. Le Borgne, Jean-Paul Kneib, E. Perez Montero, M. Scodeggio, D. Maccagni, Y. Peng, Nick Scoville, V. Mainieri, B. Meneux, P. Franzetti, Masayuki Tanaka, Lucia Pozzetti, C. Knobel, E. Ricciardelli, A. Iovino, Olga Cucciati, INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano (IASF-MI), Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), INAF - Osservatorio Astrofisico di Arcetri (OAA), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), European Southern Observatory (ESO), Universita degli Studi di Padova, Max-Planck-Institut für Extraterrestrische Physik (MPE), INAF - Osservatorio Astronomico di Brera (OAB), Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Services communs OMP (UMS 831), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, California Institute of Technology (CALTECH), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), INAF - Osservatorio Astronomico di Roma (OAR), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Padova = University of Padua (Unipd), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Mignoli M., Zamorani G., Scodeggio M., Cimatti A., Halliday C., Lilly S. J., Pozzetti L., Vergani D., Carollo C. M., Contini T., Le Févre O., Mainieri V., Renzini A., Bardelli S., Bolzonella M., Bongiorno A., Caputi K., Coppa G., Cucciati O., de La Torre S., de Ravel L., Franzetti P., Garilli B., Iovino A., Kampczyk P., Kneib J.-P., Knobel C., Kova&#269, K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Pellò R., Peng Y., Perez Montero E., Ricciardelli E., Scarlata C., Silverman J. D., Tanaka M., Tasca L., Tresse L., Zucca E., Abbas U., Bottini D., Capak P., Cappi A., Cassata P., Fumana M., Guzzo L., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Oesch P., Porciani C., Scaramella R., Scoville N., Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Galaxies: general, Galaxies: fundamental parameters, 010504 meteorology & atmospheric sciences, Stellar population, Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Stellar classification, 01 natural sciences, Spectral line, Photometry (optics), [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Physics, education.field_of_study, Galaxies: evolution, Astronomy and Astrophysics, Space and Planetary Science, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Redshift survey, Galaxy, Bimodality, Astrophysics::Earth and Planetary Astrophysics, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]
Abstract: Aims. We investigate the relationships between three main optical galaxy observables (spectral properties, colours, and morphology), exploiting the data set provided by the COSMOS/zCOSMOS survey. The purpose of this paper is to define a simple galaxy classification cube, using a carefully selected sample of around 1000 galaxies. Methods. Using medium resolution spectra of the first 1k zCOSMOS-bright sample, optical photometry from the Subaru/COSMOS observations, and morphological measurements derived from ACS imaging, we analyze the properties of the galaxy population out to z~1. Applying three straightforward classification schemes (spectral, photometric, and morphological), we identify two main galaxy types, which appear to be linked to the bimodality of galaxy population. The three parametric classifications constitute the axes of a "classification cube". Results. A very good agreement exists between the classification from spectral data (quiescent/star-forming galaxies) and that based on colours (red/blue galaxies). The third parameter (morphology) is less well correlated with the first two: in fact a good correlation between the spectral classification and that based on morphological analysis (early-/late-type galaxies) is achieved only after partially complementing the morphological classification with additional colour information. Finally, analyzing the 3D-distribution of all galaxies in the sample, we find that about 85% of the galaxies show a fully concordant classification, being either quiescent, red, bulge-dominated galaxies (~20%) or star-forming, blue, disk-dominated galaxies (~65%). These results imply that the galaxy bimodality is a consistent behaviour both in morphology, colour and dominant stellar population, at least out to z~1., Comment: 11 pages, Accepted for publication in A&A
Published: 2009
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48. The zCOSMOS Survey. The dependence of clustering on luminosity and stellar mass at z=0.2-1

Author: C. Knobel, Graziano Coppa, Anton M. Koekemoer, M. Fumana, E. Zucca, Alvio Renzini, Lidia Tasca, A. Iovino, J. F. Le Borgne, Cristiano Porciani, M. Scodeggio, B. Meneux, P. Memeo, John D. Silverman, Luigi Guzzo, U. Abbas, Y. Peng, C. M. Carollo, Daniela Vergani, Pascal Oesch, Roberto Scaramella, V. Le Brun, V. Mainieri, Simon J. Lilly, E. Ricciardelli, Christian Maier, Thierry Contini, Christian Marinoni, Roser Pello, Olga Cucciati, L. de Ravel, Laurence Tresse, G. Zamorani, K. Kovac, Karina Caputi, P. Kampczyk, H. J. McCracken, J. P. Kneib, A. Cappi, Micol Bolzonella, Alexie Leauthaud, S. Bardelli, Bianca Garilli, Angela Bongiorno, E. Perez Montero, Alessandro Cimatti, Masayuki Tanaka, S. de la Torre, P. Franzetti, O. Le Fèvre, D. Maccagni, F. Lamareille, Paolo Cassata, Lucia Pozzetti, D. Bottini, INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Max-Planck-Institut für Extraterrestrische Physik (MPE), Universitats-Sternwarte [München], Ludwig-Maximilians-Universität München (LMU), INAF - Osservatorio Astronomico di Brera (OAB), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), AUTRES, INAF- Milano, University of Chicago, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT), Institute of Astronomy [ETH Zürich], Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Human Genetics Center, The University of Texas Health Science Center at Houston (UTHealth), School of Biotechnology and Biomolecular Sciences, University of New South Wales [Sydney] (UNSW), Space Telescope Science Institute (STSci), Centre de Physique Théorique - UMR 6207 (CPT), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Meneux B., Guzzo L., de La Torre S., Porciani C., Zamorani G., Abbas U., Bolzonella M., Garilli B., Iovino A., Pozzetti L., Zucca E., Lilly S. J., Le Fèvre O., Kneib J.-P., Carollo C. M., Contini T., Mainieri V., Renzini A., Scodeggio M., Bardelli S., Bongiorno A., Caputi K., Coppa G., Cucciati O., de Ravel L., Franzetti P., Kampczyk P., Knobel C., Kova&#269, K., Lamareille F., Le Borgne J.-F., Le Brun V., Maier C., Pellò R., Peng Y., Perez Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Tasca L., Tresse L., Vergani D., Bottini D., Cappi A., Cimatti A., Cassata P., Fumana M., Koekemoer A. M., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Oesch P., Scaramella R., Astronomy, Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Large-scale structure of Universe, media_common.quotation_subject, SPACE CORRELATION-FUNCTIONS, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Surveys, 01 natural sciences, Luminosity, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], GALAXY REDSHIFT SURVEY, 1ST EPOCH DATA, 0103 physical sciences, LARGE-SCALE STRUCTURE, Cluster analysis, 010303 astronomy & astrophysics, PHOTOMETRIC REDSHIFTS, Astrophysics::Galaxy Astrophysics, media_common, Physics, Galaxy: evolution, 010308 nuclear & particles physics, Cosmology: observations, Astronomy and Astrophysics, VLT DEEP SURVEY, Covariance, ENVIRONMENTAL DEPENDENCE, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Universe, HALO OCCUPATION DISTRIBUTION, Amplitude, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), DIGITAL SKY SURVEY, REAL-SPACE, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We study the dependence of galaxy clustering on luminosity and stellar mass at redshifts z ~ [0.2-1] using the first zCOSMOS 10K sample. We measure the redshift-space correlation functions xi(rp,pi) and its projection wp(rp) for sub-samples covering different luminosity, mass and redshift ranges. We quantify in detail the observational selection biases and we check our covariance and error estimate techniques using ensembles of semi-analytic mock catalogues. We finally compare our measurements to the cosmological model predictions from the mock surveys. At odds with other measurements, we find a weak dependence of galaxy clustering on luminosity in all redshift bins explored. A mild dependence on stellar mass is instead observed. At z~0.7, wp(rp) shows strong excess power on large scales. We interpret this as produced by large-scale structure dominating the survey volume and extending preferentially in direction perpendicular to the line-of-sight. We do not see any significant evolution with redshift of the amplitude of clustering for bright and/or massive galaxies. The clustering measured in the zCOSMOS data at 0.5=10 is only marginally consistent with predictions from the mock surveys. On scales larger than ~2 h^-1 Mpc, the observed clustering amplitude is compatible only with ~1% of the mocks. Thus, if the power spectrum of matter is LCDM with standard normalization and the bias has no unnatural scale-dependence, this result indicates that COSMOS has picked up a particularly rare, ~2-3 sigma positive fluctuation in a volume of ~10^6 h^-1 Mpc^3. These findings underline the need for larger surveys of the z~1 Universe to appropriately characterize the level of structure at this epoch., Comment: 18 pages, 21 figures, accepted for publication in Astronomy and Astrophysics
Published: 2009
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49. The Redshift Evolution of Early-Type Galaxies in COSMOS: Do Massive Early-Type Galaxies Form by Dry Mergers?

Author: Shunji S. Sasaki, J. P. Kneib, C. M. Carollo, P. Kampczyk, Alvio Renzini, Richard Massey, Anton M. Koekemoer, Claudia Scarlata, Robert Feldmann, T. Murayama, Jason Rhodes, Nick Scoville, Emanuele Daddi, Capak, H. J. McCracken, A. Leauthaud, D. B. Sanders, Y. Shioya, C. Halliday, Masaru Ajiki, Yoshiaki Taniguchi, S. J. Lilly, M. I. Takahashi, L. A. M. Tasca, M. T. Sargent, Andrea Cimatti, Bahram Mobasher, David R. Thompson, H. Aussel, Scarlata C., Carollo C. M., Lilly S. J., Feldmann R., Kampczyk P., Renzini A., Cimatti A., Halliday C., Daddi E., Sargent M. T., Koekemoer A., Scoville N., Kneib J.-P., Leauthaud A., Massey R., Rhodes J., Tasca L., Capak P., McCracken H. J., Mobasher B., Taniguchi Y., Thompson D., Ajiki M., Aussel H., Murayama T., Sanders D. B., Sasaki S., Shioya Y., Takahashi M., Services communs OMP (UMS 831), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de Physique Statistique de l'ENS (LPS), Université Paris Diderot - Paris 7 (UPD7)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, COSMIC cancer database, 010308 nuclear & particles physics, Star formation, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Cosmic variance, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Redshift, Galaxy, Luminosity, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Fundamental plane (elliptical galaxies), 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Luminosity function (astronomy)
Abstract: ABRIDGED: We study the evolution since z~1 of the rest-frame B luminosity function of the early-type galaxies (ETGs) in ~0.7 deg^2 in the COSMOS field. In order to identify ALL progenitors of local ETGs we construct the sample of high-z galaxies using two complementary criteria: (i) A morphological selection based on the Zurich Estimator of Structural Types, and (ii) A photometric selection based on the galaxy properties in the (U-V)-M_V color-magnitude diagram. We furthermore constrain both samples so as to ensure that the selected progenitors of ETGs are compatible with evolving into systems which obey the mu_B-r_{hl} Kormendy relation. Assuming the luminosity evolution derived from studies of the fundamental plane for high-z ETGs, our analysis shows no evidence for a decrease in the number density of the most massive ETGs out to z~ 0.7: Both the morphologically- and the photometrically-selected sub-samples show no evolution in the number density of bright (~L>2.5L*) ETGs. Allowing for different star formation histories, and cosmic variance, we estimate a maximum decrease in the number density of massive galaxies at that redshift of ~30%. We observe, however, in both the photometrical and morphological samples, a deficit of up to ~2-3 of fainter ETGs over the same cosmic period. Our results argue against a significant contribution of recent dissipationless ``dry'' mergers to the formation of the most massive ETGs. We suggest that the mass growth in low luminosity ETGs can be explained with a conversion from z~0.7 to z=0 of blue, irregular and disk galaxies into low- and intermediate-mass ``red'' ETGs, possibly also through gas rich mergers., Replaced with accepted version (ApJ COSMOS special issue)
Published: 2007

50. The zCOSMOS 10k-sample: The role of galaxy stellar mass in the colour-density relation up to z∼ 1

Author: D. Bottini, Thierry Contini, M. Scodeggio, G. Zamorani, L. de Ravel, B. Meneux, John D. Silverman, V. Mainieri, Anton M. Koekemoer, P. Franzetti, Olga Cucciati, O. Le Fèvre, C. Knobel, Roberto Scaramella, L. Tresse, E. Zucca, J. F. Le Borgne, Jean-Paul Kneib, A. Iovino, V. Le Brun, Paolo Cassata, Bianca Garilli, M. Mignoli, S. Bardelli, Simon J. Lilly, K. Kovac, D. Maccagni, Angela Bongiorno, C. M. Carollo, L. A. M. Tasca, Nick Scoville, P. Kampczyk, Y. Peng, Karina Caputi, R. Pello, E. Ricciardelli, Enrique Pérez-Montero, Alexie Leauthaud, Andrea Cimatti, H. J. McCracken, U. Abbas, P. Memeo, Masayuki Tanaka, Graziano Coppa, Daniela Vergani, S. de la Torre, Luigi Guzzo, Lucia Pozzetti, F. Lamareille, Christian Maier, Christian Marinoni, A. Cappi, Micol Bolzonella, Alvio Renzini, Pascal Oesch, Cristiano Porciani, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Cucciati O., Iovino A., Kova&#269, K., Scodeggio M., Lilly S. J., Bolzonella M., Bardelli S., Vergani D., Tasca L. A. M., Zucca E., Zamorani G., Pozzetti L., Knobel C., Oesch P., Lamareille F., Caputi K., Kampczyk P., Tresse L., Maier C., Carollo C. M., Contini T., Kneib J.-P., Le Fèvre O., Mainieri V., Renzini A., Bongiorno A., Coppa G., de la Torre S., de Ravel L., Franzetti P., Garilli B., Le Borgne J.-F., Le Brun V., Mignoli M., Pellò R., Peng Y., Perez-Montero E., Ricciardelli E., Silverman J. D., Tanaka M., Koekemoer A. M., Scoville N., Abbas U., Bottini D., Cappi A., Cassata P., Cimatti A., Guzzo L., Leauthaud A., Maccagni D., Marinoni C., McCracken H. J., Memeo P., Meneux B., Porciani C., and Scaramella R
Subjects: Cosmology: observations, Galaxies: evolution, Galaxies: fundamental parameters, Galaxies: high-redshift, Galaxies: statistics, Large-scale structure of Universe, Astronomy and Astrophysics, Space and Planetary Science, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Sample (material), Flux, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Spectral line, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, [INFO]Computer Science [cs], 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Galaxy, Low Mass, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: [Abridged] With the first 10000 spectra of the flux limited zCOSMOS sample (I=1) galaxies 'f_red' depends on delta at least up to z=1, with red galaxies residing mainly in high densities. This trend weakens for increasing z, and it is mirrored by the behaviour of the fraction of galaxies with D4000A break >=1.4. We also find that up to z=1 the fraction of galaxies with log(EW[OII]) >=1.15 is higher for lower delta, and also this dependence weakens for increasing z. Given the triple dependence among galaxy colours, stellar mass and delta, the colour-delta relation found in the luminosity-selected sample can be due to the broad range of stellar masses. Thus, we fix the stellar mass and we find that in this case the colour-delta relation is flat up to z=1 for galaxies with log(M/M_sun)>=10.7. This means that for these masses the colour-delta relation found in a luminosity-selected sample is the result of the combined colour-mass and mass-delta relations. In contrast, we find that for 0.1, 19 pages, 12 figures, submitted to A&A, revised version after referee comments
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