Search

Your search keyword '"Hathi N.P."' showing total 42 results
Start Over Author "Hathi N.P."
42 results on '"Hathi N.P."'

1. Galaxy morphology from z~6 through the lens of JWST

Author

Huertas-Company, M., primary, Iyer, K.G., additional, Angeloudi, E., additional, Bagley, M.B., additional, Finkelstein, S.L., additional, Kartaltepe, J., additional, McGrath, E.J., additional, Sarmiento, R., additional, Vega-Ferrero, J., additional, Arrabal Haro, P., additional, Behroozi, P., additional, Buitrago, F., additional, Cheng, Y., additional, Costantin, L., additional, Dekel, A., additional, Dickinson, M., additional, Elbaz, D., additional, Grogin, N.A., additional, Hathi, N.P., additional, Holwerda, B.W., additional, Koekemoer, A.M., additional, Lucas, R.A., additional, Papovich, C., additional, Perez-Gonzalez, P.G., additional, Pirzkal, N., additional, Seille, L-M., additional, de la Vega, A., additional, Wuyts, S., additional, Yang, G., additional, and Yung, L.Y.A., additional

Published
2023
Full Text
View/download PDF

2. No strong dependence of Lyman continuum leakage on physical properties of star-forming galaxies at $\mathbf{3.1 \lesssim z \lesssim 3.5}$

Author

Saxena, A., Pentericci, L., Ellis, R.S., Guaita, L., Calabrò, A., Schaerer, D., Vanzella, E., Amorín, R., Bolzonella, M., Castellano, M., Fontanot, F., Hathi, N.P., Hibon, P., Llerena, M., Mannucci, F., Saldana-Lopez, A., Talia, M., Zamorani, G., 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), 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), and 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)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), galaxies: high-redshift, Astrophysics of Galaxies (astro-ph.GA), first stars, FOS: Physical sciences, reionization, dark ages, early Universe, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present Lyman continuum (LyC) radiation escape fraction $f_{\rm{esc}}$ measurements for 183 spectroscopically confirmed star-forming galaxies in the redshift range $3.11 < z < 3.53$ in the \textit{Chandra} Deep Field South. We use ground-based imaging to measure $f_{\rm{esc}}$, and use ground- and space-based photometry to derive galaxy physical properties using spectral energy distribution (SED) fitting. We additionally derive [O III]+H$��$ equivalent widths (that fall in the observed K band) by including nebular emission in the SED fitting. After removing foreground contaminants, we report the discovery of 11 new candidate LyC leakers, with absolute LyC escape fractions, $f_{\rm{esc}}$ in the range $0.14-0.85$. From non-detections, we place $1��$ upper limits of $f_{\rm{esc}}300$A. For candidate LyC leakers, we find a weak negative correlation between $f_{\rm{esc}}$ and galaxy stellar masses, no correlation between $f_{\rm{esc}}$ specific star-formation rates (sSFRs) and a positive correlation between $f_{\rm{esc}}$ and EW$_0$([O III]+H$��$). The weak/no correlations between stellar mass and sSFRs may be explained by misaligned viewing angles and/or non-coincident timescales of starburst activity and periods of high $f_{\rm{esc}}$. Alternatively, escaping radiation may predominantly occur in highly localised star-forming regions, or $f_{\rm{esc}}$ measurements may be impacted by stochasticity of the intervening neutral medium, obscuring any global trends with galaxy properties. These hypotheses have important consequences for models of reionisation., 19 pages, 11 figures, 1 appendix, published in Monthly Notices of the Royal Astronomical Society

Published
2023
Full Text
View/download PDF

5. The VANDELS ESO public spectroscopic survey

Author

McLure, R.J., Pentericci, L., Cimatti, A., Dunlop, J.S., Elbaz, D., Fontana, A., Nandra, K., Amorin, R., Bolzonella, M., Bongiorno, A., Carnall, A.C., Castellano, M., Cirasuolo, M., Cucciati, O., Cullen, F., De Barros, S., Finkelstein, S.L., Fontanot, F., Franzetti, P., Fumana, M., Gargiulo, A., Garilli, B., Guaita, L., Hartley, W.G., Iovino, A., Jarvis, M.J., Juneau, S., Karman, W., Maccagni, D., Marchi, F., Pompei, E., Pozzetti, L., Scodeggio, M., Sommariva, V., Talia, M., Almaini, Omar, Balestra, I., Bardelli, S., Bell, E.F., Bourne, N., Bowler, R.A.A., Brusa, M., Buitrago, F., Caputi, K.I., Cassata, P., Charlot, S., Citro, A., Cresci, G., Cristiani, S., Curtis-Lake, E., Dickinson, M., Fazio, G.G., Ferguson, H.C., Fiore, F., Franco, M., Fynbo, J P U, Galametz, A., Georgakakis, A., Giavalisco, M., Grazian, A., Hathi, N.P., Jung, I., Kim, S., Koekemoer, A.M., Khusanova, Y., Lotz, J.M., Mannucci, F., Maltby, David T., Matsuoka, K., McLeod, D.J., Mendez-Hernandez, H., Mendez-Abreu, J., Mignoli, M., Moresco, M., Mortlock, A., Nonino, M., Pannella, M., Papovich, C., Popesso, P., Rosario, D.P., Salvato, M., Santini, P., Schaerer, D., Schreiber, C., Stark, D.P., Tasca, L.A.M., Thomas, R., Treu, T., Vanzella, E., Wild, V., Williams, C.C., Zamorani, G., and Zucca, E.

Subjects
surveys, galaxies: high-redshift, galaxies: star formation, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, galaxies: evolution, Astrophysics::Galaxy Astrophysics
Abstract

VANDELS is a uniquely deep spectroscopic survey of high-redshift galaxies with the VIMOS spectrograph on ESO’s Very Large Telescope (VLT). The survey has obtained ultradeep optical (0.48 < λ < 1.0 μm) spectroscopy of ≃2100 galaxies within the redshift interval 1.0 ≤ z ≤ 7.0, over a total area of ≃0.2 deg2 centred on the CANDELS Ultra Deep Survey and Chandra Deep Field South fields. Based on accurate photometric redshift pre-selection, 85 per cent of the galaxies targeted by VANDELS were selected to be at z ≥ 3. Exploiting the red sensitivity of the refurbished VIMOS spectrograph, the fundamental aim of the survey is to provide the high-signal-to-noise ratio spectra necessary to measure key physical properties such as stellar population ages, masses, metallicities, and outflow velocities from detailed absorption-line studies. Using integration times calculated to produce an approximately constant signal-to-noise ratio (20 < tint< 80 h), the VANDELS survey targeted: (a) bright star-forming galaxies at 2.4 ≤ z ≤ 5.5, (b) massive quiescent galaxies at 1.0 ≤ z ≤ 2.5, (c) fainter star-forming galaxies at 3.0 ≤ z ≤ 7.0, and (d) X-ray/Spitzer-selected active galactic nuclei and Herschel-detected galaxies. By targeting two extragalactic survey fields with superb multiwavelength imaging data, VANDELS will produce a unique legacy data set for exploring the physics underpinning high-redshift galaxy evolution. In this paper, we provide an overview of the VANDELS survey designed to support the science exploitation of the first ESO public data release, focusing on the scientific motivation, survey design, and target selection.

Published
2018

6. The ALPINE−ALMA [C <scp>ii</scp>] Survey: on the nature of an extremely obscured serendipitous galaxy

Author

S. Bardelli, Paolo Cassata, G. C. Jones, Michele Ginolfi, Andreas L. Faisst, L. Morselli, Livia Vallini, Matthieu Béthermin, O. Le Fevre, D. Vergani, Y. Fudamoto, Miroslava Dessauges-Zavadsky, G. Rodighiero, E. Zucca, Edo Ibar, Margherita Talia, John D. Silverman, Dominik Riechers, Brian C. Lemaux, Peter Capak, Daniel Schaerer, Seiji Fujimoto, A. Enia, Médéric Boquien, Lin Yan, Andrea Cimatti, Chiara Mancini, L. Rodríguez-Muñoz, F. Loiacono, G. Zamorani, M. Romano, Nimish P. Hathi, Carlotta Gruppioni, Anton M. Koekemoer, 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 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), Romano, M., Cassata, P., Morselli, L., Lemaux, B. C., Bethermin, M. M., Capak, P., Faisst, A., Le Fevre, O., Schaerer, D., Silverman, J., Yan, L., Bardelli, S., Boquien, M., Cimatti, A., Dessauges-Zavadsky, M., Enia, A., Fudamoto, Y., Fujimoto, S., Ginolfi, M., Gruppioni, C., Hathi, N. P., Ibar, E., Jones, G. C., Koekemoer, A. M., Loiacono, F., Mancini, C., Riechers, D. A., Rodighiero, G., Rodriguez-Munoz, L., Talia, M., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Romano M., Cassata P., Morselli L., Lemaux B.C., Bethermin M.M., Capak P., Faisst A., Le Fevre O., Schaerer D., Silverman J., Yan L., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Enia A., Fudamoto Y., Fujimoto S., Ginolfi M., Gruppioni C., Hathi N.P., Ibar E., Jones G.C., Koekemoer A.M., Loiacono F., Mancini C., Riechers D.A., Rodighiero G., Rodriguez-Munoz L., Talia M., Vallini L., Vergani D., Zamorani G., and Zucca E.

Subjects
Stellar mass, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, MASS, 01 natural sciences, Luminosity, Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, 0103 physical sciences, STAR-FORMING GALAXIES, PHOTOMETRIC REDSHIFTS, 010303 astronomy & astrophysics, Reionization, evolution [galaxies], Astrophysics::Galaxy Astrophysics, COSMOS, Physics, galaxies: evolution, SUBMILLIMETER GALAXIES, INTERSTELLAR-MEDIUM, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Star formation, Astronomy and Astrophysics, DUST CONTENT, Atacama Large Millimeter Array, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, STELLAR, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Spectral energy distribution, Astrophysics::Earth and Planetary Astrophysics, EMISSION, FAR-INFRARED SPECTROSCOPY, high-redshift [galaxies]
Abstract

We report the serendipitous discovery of a bright galaxy (Gal-A) observed as part of the ALMA Large Program to INvestigate [CII] at Early times (ALPINE). While this galaxy is detected both in line and continuum emission in ALMA Band 7, it is completely dark in UV/optical filters and only presents a marginal detection in the UltraVISTA Ks band. We discuss the nature of the observed ALMA line, i.e. whether the emission comes from [CII] at z~4.6, or from high-J CO transitions at z~2.2. In the first case we find a [CII]-to-FIR luminosity ratio of log(L_[CII]/L_FIR)=-2.5, consistent with the average value for local star-forming galaxies (SFGs); in the second case, instead, the source would lie outside of the empirical relations between L_CO and L_FIR found in the literature. At both redshifts, we derive the star-formation rate (SFR) from the ALMA continuum, and the stellar mass (M*) by using stellar population synthesis models as input for LePHARE spectral energy distribution (SED) fitting. Exploiting our results, we believe that Gal-A is a Main-Sequence (MS), dusty SFG at z=4.6 (i.e. [CII] emitter) with log(SFR/[M/yr])~1.4 and log(M*/M)~9.7. This work underlines the crucial role of the ALPINE survey in making a census of this class of objects, in order to unveil their contribution to the global star-formation rate density (SFRD) of the Universe at the end of the Reionisation epoch., Comment: 13 pages, 6 figures. Submitted to MNRAS

Published
2020
Full Text
View/download PDF

7. The role of galaxy mass on AGN emission: a view from the VANDELS survey

Author

Ricardo Amorín, Adriana Gargiulo, D. J. McLeod, Angela Bongiorno, Laura Pentericci, Andrea Cimatti, Margherita Talia, G. Zamorani, Nimish P. Hathi, Ross J. McLure, Marcella Brusa, Adriano Fontana, Michele Cirasuolo, A. Saxena, M. Magliocchetti, B. Garilli, ITA, Magliocchetti M., Pentericci L., Cirasuolo M., Zamorani G., Amorin R., Bongiorno A., Cimatti A., Fontana A., Garilli B., Gargiulo A., Hathi N.P., McLeod D.J., McLure R.J., Brusa M., Saxena A., and Talia M.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Radio continuum: galaxie, 01 natural sciences, Luminosity, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, COSMIC cancer database, Mass distribution, 010308 nuclear & particles physics, Astronomy and Astrophysics, Galaxies: active, Astrophysics - Astrophysics of Galaxies, Galaxy, X-rays: galaxies, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present a comparative analysis of the properties of AGN emitting at radio and X-ray wavelengths. The study is performed on 907 X-ray AGN and 100 radio AGN selected on the CDFS and UDS fields and makes use of new and ancillary data available to the VANDELS collaboration. Our results indicate that the mass of the host galaxy is a fundamental quantity which determines the level of AGN activity at the various wavelengths. Indeed large stellar masses are found to be connected with AGN radio emission, as virtually all radio-active AGN reside within galaxies of M*>10^{10} Msun. Large stellar masses also seem to favour AGN activity in the X-ray, even though X-ray AGN present a mass distribution which is more spread out and with a non-negligible tail at M*, 18 pages, 18 figures, to appear on MNRAS

Published
2020
Full Text
View/download PDF

8. The NIRVANDELS Survey: a robust detection of α-enhancement in star-forming galaxies at z 3.4

Author

Naveen A. Reddy, Marco Castellano, G. Zamorani, Alice E. Shapley, Ross J. McLure, F. Mannucci, M. Bolzonella, A. Calabrò, Ricardo Amorín, Adriano Fontana, M. Hamadouche, Michele Cirasuolo, Nimish P. Hathi, Fergus Cullen, Michael W. Topping, James Dunlop, Ryan L. Sanders, L. Guaita, Fabio Fontanot, R. Begley, D. J. McLeod, Andrea Cimatti, Giovanni Cresci, A. C. Carnall, Laura Pentericci, Margherita Talia, A. Saxena, B. Garilli, Cullen F., Shapley A.E., McLure R.J., Dunlop J.S., Sanders R.L., Topping M.W., Reddy N.A., Amorin R., Begley R., Bolzonella M., Calabro A., Carnall A.C., Castellano M., Cimatti A., Cirasuolo M., Cresci G., Fontana A., Fontanot F., Garilli B., Guaita L., Hamadouche M., Hathi N.P., Mannucci F., McLeod D.J., Pentericci L., Saxena A., Talia M., and Zamorani G.

Subjects
Physics, 010308 nuclear & particles physics, astro-ph.GA, Star (game theory), Metallicity, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxies: high redshift, 01 natural sciences, Galaxy, Redshift, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Galaxies: abundance
Abstract

We present results from the NIRVANDELS survey investigating the gas-phase metallicity ($\mathrm{Z}_{\mathrm{gas}}$, tracing O/H) and stellar metallicity ($Z_{\star}$, tracing Fe/H) of 33 star-forming galaxies at redshifts $2.95 < z < 3.80$. Based on a combined analysis of deep optical and near-IR spectra, tracing the rest-frame far ultraviolet and rest-frame optical respectively, we present the first simultaneous determination of the stellar and gas-phase mass-metallicity relationships (MZRs) at $z\simeq3.4$. In both cases, we find that metallicity increases with increasing stellar mass ($M_{\star}$), and that the power-law slope at $M_{\star} \lesssim 10^{10} \mathrm{M}_{\odot}$ of both MZRs scales as $Z \propto M_{\star}^{0.3}$. Comparing the stellar and gas-phase MZRs, we present direct evidence for super-solar O/Fe ratios (i.e., $\alpha$-enhancement) at $z>3$, finding $\mathrm{(O/Fe)}\simeq (2.54 \pm 0.38) \times \mathrm{(O/Fe)}_{\odot}$, with no clear dependence on $M_{\star}$., Comment: 18 pages, 11 figures, MNRAS accepted

Published
2021
Full Text
View/download PDF

9. The VANDELS ESO public spectroscopic survey

Author

Nimish P. Hathi, Michele Moresco, Jennifer M. Lotz, Seock-Sam Kim, Lidia Tasca, Andrea Grazian, Intae Jung, Adriano Fontana, Casey Papovich, William G. Hartley, Kirpal Nandra, Emanuela Pompei, S. Bardelli, R. Begley, Mauro Giavalisco, Paola Santini, H. C. Ferguson, Andrea Cimatti, J. S. Dunlop, Lucia Guaita, H. Mendez-Hernandez, Christina C. Williams, Giovanni Cresci, A. C. Carnall, A. Saxena, Adriana Gargiulo, Paolo Cassata, A. Iovino, C. Caputi, D. Maccagni, Stephane Charlot, Michele Cirasuolo, Johan P. U. Fynbo, Stefano Cristiani, Fabrizio Fiore, L. Pentericci, Guido Roberts-Borsani, E. Curtis-Lake, M. Longhetti, Manuela Magliocchetti, Matt J. Jarvis, M. Mignoli, Y. Khusanova, Paola Popesso, Annalisa Citro, Mara Salvato, Ricardo Amorín, Lucia Pozzetti, Olga Cucciati, Fergus Cullen, Pascale Hibon, Fernando Buitrago, Daniel P. Stark, Corentin Schreiber, M. Fumana, P. Franzetti, Jairo Méndez-Abreu, E. Zucca, R. C. Thomas, Filippo Mannucci, Ross J. McLure, Mark Dickinson, K. Matsuoka, M. Franco, O. Le Fèvre, Daniel Schaerer, Steve Finkelstein, M. Bolzonella, Fabio Fontanot, David J. Rosario, Eric F. Bell, Marco Castellano, A. Calabrò, Antonis Georgakakis, Mario Nonino, G. Vietri, Maurilio Pannella, G. Brammer, Marcella Brusa, David T. Maltby, Stéphanie Juneau, Bianca Garilli, Anton M. Koekemoer, Angela Bongiorno, Vivienne Wild, Giovanni G. Fazio, David Elbaz, Margherita Talia, D. J. McLeod, M. Scodeggio, Alberto Saldana-Lopez, M. Hamadouche, Italo Balestra, Omar Almaini, G. Zamorani, Eros Vanzella, Rebecca A. A. Bowler, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-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), 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), Garilli B., McLure R., Pentericci L., Franzetti P., Gargiulo A., Carnall A., Cucciati O., Iovino A., Amorin R., Bolzonella M., Bongiorno A., Castellano M., Cimatti A., Cirasuolo M., Cullen F., Dunlop J., Elbaz D., Finkelstein S., Fontana A., Fontanot F., Fumana M., Guaita L., Hartley W., Jarvis M., Juneau S., Maccagni D., McLeod D., Nandra K., Pompei E., Pozzetti L., Scodeggio M., Talia M., Calabro A., Cresci G., Fynbo J.P.U., Hathi N.P., Hibon P., Koekemoer A.M., Magliocchetti M., Salvato M., Vietri G., Zamorani G., Almaini O., Balestra I., Bardelli S., Begley R., Brammer G., Bell E.F., Bowler R.A.A., Brusa M., Buitrago F., Caputi C., Cassata P., Charlot S., Citro A., Cristiani S., Curtis-Lake E., Dickinson M., Fazio G., Ferguson H.C., Fiore F., Franco M., Georgakakis A., Giavalisco M., Grazian A., Hamadouche M., Jung I., Kim S., Khusanova Y., Le Fevre O., Longhetti M., Lotz J., Mannucci F., Maltby D., Matsuoka K., Mendez-Hernandez H., Mendez-Abreu J., Mignoli M., Moresco M., Nonino M., Pannella M., Papovich C., Popesso P., Roberts-Borsani G., Rosario D.J., Saldana-Lopez A., Santini P., Saxena A., Schaerer D., Schreiber C., Stark D., Tasca L.A.M., Thomas R., Vanzella E., Wild V., Williams C., Zucca E., University of St Andrews. School of Physics and Astronomy, and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
SELECTION, Galaxies: fundamental parameter, Astrophysics, I, Surveys, 01 natural sciences, observations/surveys/catalogs [Cosmology], Cosmology: observation, Cosmology: Observations, Spectral line, statistics [Galaxies], DATA-REDUCTION, QB Astronomy, Galaxies: distances and redshift, Galaxies: Fundamental Parameters, 010303 astronomy & astrophysics, QC, QB, REDSHIFT SURVEY, Physics, observations [cosmology], Catalogs, Cosmology: observations, Galaxies: distances and redshifts, Galaxies: fundamental parameters, Galaxies: statistics, Galaxies: Statistics, fundamental parameters [Galaxies], astro-ph.CO, Catalog, X-RAY-PROPERTIES, Data release, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), astro-ph.GA, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxies: Distances and Redshifts, surveys, 0103 physical sciences, STAR-FORMING GALAXIES, distances and redshifts [Galaxies], Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Galaxies: statistic, Astronomy and Astrophysics, DAS, VLT DEEP SURVEY, Astrophysics - Astrophysics of Galaxies, EVOLUTION, STELLAR, QC Physics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), QUIESCENT GALAXIES, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], catalogs
Abstract

VANDELS is an ESO Public Spectroscopic Survey designed to build a sample of high signal to noise, medium resolution spectra of galaxies at redshift between 1 and 6.5. Here we present the final Public Data Release of the VANDELS Survey, comprising 2087 redshift measurements. We give a detailed description of sample selection, observations and data reduction procedures. The final catalogue reaches a target selection completeness of 40% at iAB = 25. The high Signal to Noise ratio of the spectra (above 7 in 80% of the spectra) and the dispersion of 2.5�� allowed us to measure redshifts with high precision, the redshift measurement success rate reaching almost 100%. Together with the redshift catalogue and the reduced spectra, we also provide optical mid-IR photometry and physical parameters derived through SED fitting. The observed galaxy sample comprises both passive and star forming galaxies covering a stellar mass range 8.3< Log(M*/Msolar), 16 pages, 13 figures, accepted for publication in Astronomy & Astrophysics

Published
2021
Full Text
View/download PDF

10. The ALPINE-ALMA [CII] survey : dust mass budget in the early Universe

Author

John D. Silverman, S. Bardelli, E. Zucca, Y. Khusanova, Roberto Decarli, Roberto Maiolino, M. Romano, Margherita Talia, Dominik A. Riechers, Peter Capak, Nimish P. Hathi, G. Zamorani, G. Rodighiero, Livia Vallini, A. Enia, Matthieu Béthermin, O. Le Fèvre, Anton M. Koekemoer, Y. Fudamoto, Paolo Cassata, Andrea Cimatti, Michele Ginolfi, Andreas L. Faisst, Lin Yan, Daniel Schaerer, Miroslava Dessauges-Zavadsky, Médéric Boquien, Francesca Pozzi, F. Loiacono, G. C. Jones, Carlotta Gruppioni, Desika Narayanan, Brian C. Lemaux, Francesco Calura, Daniela Vergani, Pozzi, F., Calura, F., Fudamoto, Y., Dessauges-Zavadsky, M., Gruppioni, C., Talia, M., Zamorani, G., Bethermin, M., Cimatti, A., Enia, A., Khusanova, Y., Decarli, R., Le Fevre, O., Capak, P., Cassata, P., Faisst, A. L., Yan, L., Schaerer, D., Silverman, J., Bardelli, S., Boquien, M., Narayanan, D., Ginolfi, M., Hathi, N. P., Jones, G. C., Koekemoer, A. M., Lemaux, B. C., Loiacono, F., Maiolino, R., Riechers, D. A., Rodighiero, G., Romano, M., Vallini, L., Vergani, D., Zucca, E., Jones, Gareth [0000-0002-0267-9024], Maiolino, Roberto [0000-0002-4985-3819], Apollo - University of Cambridge Repository, 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), Pozzi F., Calura F., Fudamoto Y., Dessauges-Zavadsky M., Gruppioni C., Talia M., Zamorani G., Bethermin M., Cimatti A., Enia A., Khusanova Y., Decarli R., Le Fevre O., Capak P., Cassata P., Faisst A.L., Yan L., Schaerer D., Silverman J., Bardelli S., Boquien M., Narayanan D., Ginolfi M., Hathi N.P., Jones G.C., Koekemoer A.M., Lemaux B.C., Loiacono F., Maiolino R., Riechers D.A., Rodighiero G., Romano M., Vallini L., Vergani D., and Zucca E.

Subjects
Extinction (astronomy), Continuum (design consultancy), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Disc galaxy, 01 natural sciences, Luminosity, high-redshift [Galaxies], Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, 0103 physical sciences, ISM [Galaxies], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Luminosity function (astronomy), Physics, 010308 nuclear & particles physics, extinction, Astronomy and Astrophysics, Dust, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Elliptical galaxy, dust, dust, extinction, Astrophysics::Earth and Planetary Astrophysics, galaxies: ISM
Abstract

The dust content of normal galaxies and the dust mass density (DMD) at high-z (z>4) are unconstrained given the source confusion and the sensitivity limitations of previous observations. The ALMA Large Program to INvestigate [CII] at Early Times (ALPINE), which targeted 118 UV-selected star-forming galaxies at 4.4, Comment: 16 pages, 6 figures. Accepted for publication in A&A

Published
2021
Full Text
View/download PDF

11. The ALPINE-ALMA [CII] survey: Obscured star formation rate density and main sequence of star-forming galaxies at z > 4

Author

Miroslava Dessauges-Zavadsky, Francesca Pozzi, F. Loiacono, Daniela Vergani, Dominik A. Riechers, Michele Ginolfi, Pascal Oesch, M. Romano, G. C. Jones, Carlotta Gruppioni, Peter Capak, O. Le Fèvre, G. Zamorani, Daniel Schaerer, Paolo Cassata, Andreas L. Faisst, Ricardo Amorín, Sune Toft, Médéric Boquien, E. Zucca, Nimish P. Hathi, Brian C. Lemaux, Andrea Cimatti, John D. Silverman, Anton M. Koekemoer, Margherita Talia, Roberto Maiolino, Y. Khusanova, Lin Yan, Y. Fudamoto, Matthieu Béthermin, S. Bardelli, Guilaine Lagache, Khusanova Y., Bethermin M., Le Fevre O., Capak P., Faisst A.L., Schaerer D., Silverman J.D., Cassata P., Yan L., Ginolfi M., Fudamoto Y., Loiacono F., Amorin R., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Gruppioni C., Hathi N.P., Jones G.C., Koekemoer A.M., Lagache G., Maiolino R., Lemaux B.C., Oesch P., Pozzi F., Riechers D.A., Romano M., Talia M., Toft S., Vergani D., Zamorani G., and Zucca E.

Subjects
EMISSION-LINES, SPECTROSCOPIC SURVEY, Stellar mass, ULTRA DEEP FIELD, Continuum (design consultancy), BILLION YEARS, galaxies [submillimeter], Astrophysics, Star (graph theory), 01 natural sciences, Luminosity, 0103 physical sciences, NUMBER COUNTS, Proxy (statistics), PHOTOMETRIC REDSHIFTS, 010303 astronomy & astrophysics, evolution [galaxies], Physics, DUST ATTENUATION, Galaxies: star formation, UV LUMINOSITY FUNCTIONS, 010308 nuclear & particles physics, Star formation, Galaxies: high-redshift, Galaxies: evolution, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, LYMAN-BREAK GALAXIES, Submillimeter: galaxies, Space and Planetary Science, STELLAR MASS FUNCTION, star formation [galaxies], high-redshift [galaxies]
Abstract

Star formation rate (SFR) measurements at z>4 have relied mostly on rest-frame far-ultraviolet (FUV) observations. The corrections for dust attenuation based on IRX-$\beta$ relation are highly uncertain and are still debated in the literature. Hence, rest-frame far-infrared (FIR) observations are necessary to constrain the dust-obscured component of the SFR. In this paper, we exploit the rest-frame FIR continuum observations collected by the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) to directly constrain the obscured SFR in galaxies at 4.4, Comment: submitted to A&A, 19 pages

Published
2021
Full Text
View/download PDF

12. Less and more IGM-transmitted galaxies from z ∼ 2.7 to z ∼ 6 from VANDELS and VUDS

Author

E. Zucca, J. P. U. Fynbo, Margherita Talia, Ricardo Amorín, Anton M. Koekemoer, Y. Khusanova, Stefano Cristiani, Pascale Hibon, Laura Pentericci, Marco Castellano, F. Mannucci, Daniel Schaerer, S. Bardelli, V. Le Brun, Andrea Cimatti, R. Thomas, B. Garilli, M. Franco, O. Le Fevre, Adriana Gargiulo, Giovanni Cresci, Fabio Fontanot, Nimish P. Hathi, Brian C. Lemaux, G. Zamorani, 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), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Thomas R., Pentericci L., Le Fevre O., Koekemoer A.M., Castellano M., Cimatti A., Fontanot F., Gargiulo A., Garilli B., Talia M., Amorin R., Bardelli S., Cristiani S., Cresci G., Franco M., Fynbo J.P.U., Hathi N.P., Hibon P., Khusanova Y., Le Brun V., Lemaux B.C., Mannucci F., Schaerer D., Zamorani G., and Zucca E.

Subjects
Physics, 0303 health sciences, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmology: miscellaneou, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Astrophysics - Astrophysics of Galaxies, Galaxy, 03 medical and health sciences, Space and Planetary Science, galaxies: high-redshift, Intergalactic medium, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, intergalactic medium, cosmology: miscellaneous, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, 030304 developmental biology, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Aim. Our aim is to analyse the variance of the Inter-Galactic Medium transmission (IGM) by studying this parameter in the rest-frame UV spectra of a large sample of high redshift galaxies. Method. We make use of the VIMOS Ultra Deep Survey and the VANDELS public survey to have an insight into the far UV spectrum of $2.7, Comment: Accepted for publication on A&A

Published
2021
Full Text
View/download PDF

13. The ALPINE-ALMA [C II] Survey: [C II] 158 μm Emission Line Luminosity Functions at z ~ 4–6

Author

L. A. M. Tasca, E. Ibar, Peter Capak, Sune Toft, Livia Vallini, Miroslava Dessauges-Zavadsky, Michele Ginolfi, Francesca Pozzi, F. Loiacono, Nimish P. Hathi, Andreas L. Faisst, E. Zucca, A. Cimatti, Anna Sajina, G. Zamorani, Paolo Cassata, G. C. Jones, M. Bethermin, Lin Yan, Margherita Talia, Carlotta Gruppioni, S. Bardelli, John D. Silverman, D. Vergani, O. Le Fevre, Pascal Oesch, G. Lagache, Brian Lemaux, Dominik Riechers, Anton M. Koekemoer, Daniel Schaerer, Yan, L., Sajina, A., Loiacono, F., Lagache, G., Bethermin, M., Faisst, A., Ginolfi, M., Fevre, O. L., Gruppioni, C., Capak, P. L., Cassata, P., Schaerer, D., Silverman, J. D., Bardelli, S., Dessauges-Zavadsky, M., Cimatti, A., Hathi, N. P., Lemaux, B. C., Ibar, E., Jones, G. C., Koekemoer, A. M., Oesch, P. A., Talia, M., Pozzi, F., Riechers, D. A., Tasca, L. A. M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Yan L., Sajina A., Loiacono F., Lagache G., Bethermin M., Faisst A., Ginolfi M., Fevre O.L., Gruppioni C., Capak P.L., Cassata P., Schaerer D., Silverman J.D., Bardelli S., Dessauges-Zavadsky M., Cimatti A., Hathi N.P., Lemaux B.C., Ibar E., Jones G.C., Koekemoer A.M., Oesch P.A., Talia M., Pozzi F., Riechers D.A., Tasca L.A.M., Toft S., Vallini L., Vergani D., Zamorani G., Zucca E., Caltech Department of Astronomy [Pasadena], and California Institute of Technology (CALTECH)

Subjects
010504 meteorology & atmospheric sciences, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Population, FOS: Physical sciences, Emission line galaxie, Astrophysics, 01 natural sciences, Luminosity, Warm ionized medium, Warm neutral medium, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Emission spectrum, education, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Line (formation), Luminosity function (astronomy), Physics, education.field_of_study, Molecular gas, Luminosity function, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, High-redshift galaxie, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], Order of magnitude
Abstract

We present the [CII]158$\mu$m line luminosity functions (LFs) at $z\sim4-6$ using the ALMA observations of 118 sources, which are selected to have UV luminosity $M_{1500A}10^9L_{\odot}$, suggesting that UV-faint but [CII]-bright sources likely make a significant contributions to the [CII] emitter volume density. When we include all the LF estimates, we find that available model predictions underestimate the number densities of [CII] emitters at $z\sim4-6$. Finally, we set a constraint on the molecular gas mass density at $z\sim4-6$, with $\rho_{mol} \sim (2-7)\times10^7M_\odot$\,Mpc$^{-3}$. This is broadly consistent with previous studies., Comment: 17 pages, 9 Figures, Update to match with the published version. Accepted for the publication in ApJ

Published
2020
Full Text
View/download PDF

14. The ALPINE-ALMA [CII] survey:Molecular gas budget in the early Universe as traced by [CII]

Author

Andrea Cimatti, S. Bardelli, Andreas L. Faisst, E. Zucca, G. Rodighiero, Y. Khusanova, Daniel Schaerer, Pascal Oesch, Sune Toft, Paolo Cassata, Livia Vallini, Nimish P. Hathi, Carlotta Gruppioni, M. Romano, Francesca Pozzi, F. Loiacono, G. Zamorani, Michele Ginolfi, Lin Yan, John D. Silverman, Miroslava Dessauges-Zavadsky, Anton M. Koekemoer, Y. Fudamoto, G. C. Jones, Desika Narayanan, Margherita Talia, Brian C. Lemaux, Daniela Vergani, Seiji Fujimoto, Peter Capak, Edo Ibar, Médéric Boquien, Matthieu Béthermin, O. Le Fevre, Ricardo Amorín, 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), Dessauges-Zavadsky M., Ginolfi M., Pozzi F., Bethermin M., Le Fevre O., Fujimoto S., Silverman J.D., Jones G.C., Vallini L., Schaerer D., Faisst A.L., Khusanova Y., Fudamoto Y., Cassata P., Loiacono F., Capak P.L., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Gruppioni C., Hathi N.P., Ibar E., Koekemoer A.M., Lemaux B.C., Narayanan D., Oesch P.A., Rodighiero G., Romano M., Talia M., Toft S., Vergani D., Zamorani G., Zucca E., Dessauges-Zavadsky, M., Ginolfi, M., Pozzi, F., Bethermin, M., Le Fevre, O., Fujimoto, S., Silverman, J. D., Jones, G. C., Vallini, L., Schaerer, D., Faisst, A. L., Khusanova, Y., Fudamoto, Y., Cassata, P., Loiacono, F., Capak, P. L., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Gruppioni, C., Hathi, N. P., Ibar, E., Koekemoer, A. M., Lemaux, B. C., Narayanan, D., Oesch, P. A., Rodighiero, G., Romano, M., Talia, M., Toft, S., Vergani, D., Zamorani, G., and Zucca, E.

Subjects
C-II, Stellar mass, MASS-METALLICITY RELATION, FOS: Physical sciences, DUST, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, CONVERSION FACTOR, SCALING RELATIONS, 01 natural sciences, Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, 0103 physical sciences, STAR-FORMING GALAXIES, Astrophysics::Solar and Stellar Astrophysics, MAIN-SEQUENCE, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, evolution [galaxies], molecules [ISM], Physics, LEGACY SURVEY, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], ISM [galaxies], 010308 nuclear & particles physics, Star formation, Gas depletion, Gas supply, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, ISM: molecules, EVOLUTION, MODEL, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics of Galaxies (astro-ph.GA), Halo, galaxies: evolution, Cosmic time, galaxies: ISM, high-redshift [galaxies]
Abstract

The molecular gas content of normal galaxies at z>4 is poorly constrained, because the commonly used molecular gas tracers become hard to detect. We use the [CII]158um luminosity, recently proposed as a molecular gas tracer, to estimate the molecular gas content in a large sample of main-sequence star-forming galaxies at z=4.4-5.9, with a median stellar mass of 10^9.7 Msun, drawn from the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) survey. The agreement between molecular gas masses derived from [CII] luminosity, dynamical mass, and rest-frame 850um luminosity, extrapolated from the rest-frame 158um continuum, supports [CII] as a reliable tracer of molecular gas in our sample. We find a continuous decline of the molecular gas depletion timescale from z=0 to z=5.9, which reaches a mean value of (4.6+/-0.8)x10^8 yr at z~5.5, only a factor of 2-3 shorter than in present-day galaxies. This suggests a mild enhancement of star formation efficiency toward high redshifts, unless the molecular gas fraction significantly increases. Our estimates show that the rise in molecular gas fraction as reported previously, flattens off above z~3.7 to achieve a mean value of 63%+/-3 over z=4.4-5.9. This redshift evolution of the gas fraction is in line with the one of the specific star formation rate. We use multi-epoch abundance matching to follow the gas fraction evolution over cosmic time of progenitors of z=0 Milky Way-like galaxies in 10^13 Msun halos and of more massive z=0 galaxies in 10^14 Msun halos. Interestingly, the former progenitors show a monotonic decrease of the gas fraction with cosmic time, while the latter show a constant gas fraction from z=5.9 to z~2 and a decrease at z, 16 pages, 9 figures, 2 tables. Submitted to Astronomy & Astrophysics

Published
2020
Full Text
View/download PDF

15. The ALPINE-ALMA [CII] survey: Dust attenuation properties and obscured star formation at z~4.4-5.8

Author

Anton M. Koekemoer, Margherita Talia, Guilaine Lagache, Ricardo Amorín, Desika Narayanan, G. Rodighiero, Sune Toft, Brian C. Lemaux, G. Zamorani, Miroslava Dessauges-Zavadsky, Livia Vallini, Y. Khusanova, Matthieu Béthermin, Roberto Maiolino, Andrea Cimatti, Lin Yan, Daniela Vergani, Y. Fudamoto, Francesca Pozzi, Nimish P. Hathi, F. Loiacono, Michele Ginolfi, Edo Ibar, Seiji Fujimoto, S. Bardelli, Médéric Boquien, G. C. Jones, Carlotta Gruppioni, Daniel Schaerer, Andreas L. Faisst, O. Le Fèvre, E. Zucca, Dominik A. Riechers, John D. Silverman, Pascal Oesch, Peter Capak, Paolo Cassata, 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), Fudamoto Y., Oesch P.A., Faisst A., Bethermin M., Ginolfi M., Khusanova Y., Loiacono F., Le Fevre O., Capak P., Schaerer D., Silverman J.D., Cassata P., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Fujimoto S., Gruppioni C., Hathi N.P., Ibar E., Jones G.C., Koekemoer A.M., Lagache G., Lemaux B.C., Maiolino R., Narayanan D., Pozzi F., Riechers D.A., Rodighiero G., Talia M., Toft S., Vallini L., Vergani D., Zamorani G., Zucca E., Fudamoto, Y., Oesch, P. A., Faisst, A., Bethermin, M., Ginolfi, M., Khusanova, Y., Loiacono, F., Le Fevre, O., Capak, P., Schaerer, D., Silverman, J. D., Cassata, P., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Dessauges-Zavadsky, M., Fujimoto, S., Gruppioni, C., Hathi, N. P., Ibar, E., Jones, G. C., Koekemoer, A. M., Lagache, G., Lemaux, B. C., Maiolino, R., Narayanan, D., Pozzi, F., Riechers, D. A., Rodighiero, G., Talia, M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Jones, Gareth [0000-0002-0267-9024], Maiolino, Roberto [0000-0002-4985-3819], and Apollo - University of Cambridge Repository

Subjects
Stellar mass, Extinction (astronomy), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, high-redshift [Galaxies], Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, 0103 physical sciences, ISM [Galaxies], Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Reionization, Astrophysics::Galaxy Astrophysics, Physics, Infrared excess, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Star formation, extinction, Astronomy and Astrophysics, Dust, Extinction, Atacama Large Millimeter Array, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics of Galaxies (astro-ph.GA), dust, Astrophysics::Earth and Planetary Astrophysics, galaxies: ISM
Abstract

We present dust attenuation properties of spectroscopically confirmed star forming galaxies on the main sequence at a redshift of ~4.4-5.8. Our analyses are based on the far infrared continuum observations of 118 galaxies at rest-frame 158��m obtained with the Atacama Large Millimeter Array (ALMA) Large Program to INvestigate [CII] at Early times (ALPINE). We study the connection between the ultraviolet (UV) spectral slope ($��$), stellar mass (M_*), and infrared excess (IRX=L_IR/L_UV). Twenty-three galaxies are individually detected in the continuum at >3.5 sigma significance. We perform a stacking analysis using both detections and nondetections to study the average dust attenuation properties at z~4.4-5.8. The individual detections and stacks show that the IRX-$��$ relation at z~5 is consistent with a steeper dust attenuation curve than typically found at lower redshifts (z4. Similarly, we find that our galaxies have lower IRX values, up to 1dex on average, at a fixed mass compared to previously studied IRX-M_* relations at z4 are characterised by (i) a steeper attenuation curve than at z10) at z~5-6 already exhibit an obscured fraction of star formation of ~45%, indicating a rapid build-up of dust during the epoch of reionization., 12 pages, 6 figures. accepted for publication in Astronomy & Astrophysics. Minor revisions

Published
2020
Full Text
View/download PDF

16. The ALPINE-ALMA [CII] survey: Small Ly$\alpha$-[CII] velocity offsets in main-sequence galaxies at 4.4 < z < 6

Author

G. Rodighiero, H. Mendez-Hernandez, Dominik Riechers, Seiji Fujimoto, E. Zucca, Brian C. Lemaux, Pascal Oesch, Mauro Giavalisco, Nimish P. Hathi, Andrea Cimatti, Chiara Mancini, Daniel Schaerer, L. Morselli, Y. Fudamoto, M. Bethermin, John D. Silverman, Lin Yan, Gareth J. F. Jones, M. Romano, O. Le Fevre, Andreas L. Faisst, S. Bardelli, Peter Capak, Miroslava Dessauges-Zavadsky, Paolo Cassata, Edo Ibar, Margherita Talia, Médéric Boquien, D. Vergani, Anton M. Koekemoer, G. Zamorani, Michele Ginolfi, Francesca Pozzi, 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 de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), 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), 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), Cassata P., Morselli L., Faisst A., Ginolfi M., Bethermin M., Capak P., Le Fevre O., Schaerer D., Silverman J., Yan L., Lemaux B.C., Romano M., Talia M., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Fudamoto Y., Fujimoto S., Giavalisco M., Hathi N.P., Ibar E., Jones G., Koekemoer A.M., Mendez-Hernandez H., Mancini C., Oesch P.A., Pozzi F., Riechers D.A., Rodighiero G., Vergani D., Zamorani G., Zucca E., 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), and 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)

Subjects
submillimeter: galaxies, REDSHIFT EVOLUTION, galaxies [submillimeter], PHYSICAL-PROPERTIES, Context (language use), Astrophysics, 01 natural sciences, LYMAN BREAK GALAXIES, ULTRAVIOLET-SPECTRA, galaxies: high-redshift, 0103 physical sciences, C II, STAR-FORMING GALAXIES, 010303 astronomy & astrophysics, ESCAPE FRACTION, Line (formation), Physics, Very Large Telescope, Line-of-sight, ISM [galaxies], 010308 nuclear & particles physics, Astronomy and Astrophysics, DUST CONTENT, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, COSMOS FIELD, Interstellar medium, Space and Planetary Science, LY-ALPHA RADIATION, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Equivalent width, galaxies: ISM, high-redshift [galaxies], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Lya line in the UV and the [CII] line in the FIR are widely used tools to identify galaxies and to obtain insights into ISM properties in the early Universe. By combining data obtained with ALMA in band 7 at ~ 320 GHz as part of the ALMA Large Program to INvestigate [CII] at Early Times (ALPINE) with spectroscopic data from DEIMOS at Keck, VIMOS and FORS2 at the VLT, we assembled a unique sample of 53 main-sequence star-forming galaxies at 4.4 < z < 6 in which we detect both the Lya line and the [CII]. We used [CII], observed with ALMA, as a tracer of the systemic velocity of the galaxies, and we find that 90% of the selected objects have Lya-[CII] velocity offsets in the range 0 < Dv_Lya-[CII] < 400 km/s, in line with the few measurements available so far in the early Universe, and significantly smaller than those observed at lower z. We observe ISM-[CII] offsets in the range -500 < Dv_ISM-[CII] < 0 km/s, in line with values at all redshifts. We find significant anticorrelations between Dv_Lya-[CII] and the Lya rest-frame equivalent width EW0(Lya) (or equivalently, the Lya escape fraction f_esc(Lya)). According to available models for the radiative transfer of Lya photons, the escape of Lya photons would be favored in galaxies with high outflow velocities, in agreement with our observations. The uniform shell model would also predict that the Lya escape in galaxies with slow outflows (0 < v_out < 300 km/s) is mainly determined by the neutral hydrogen column density (NHI), while the alternative model by Steidel+10 would favor a combination of NHI and covering fraction as driver of the Lya escape. We suggest that the observed increase in Lya escape that is observed between z~2 and z~6 is not due to a higher incidence of fast outflows at high redshift, but rather to a decrease in average NHI along the line of sight, or alternatively, a decrease in HI covering fraction. [abridged], Comment: 22 pages, 6 figures, accepted for publication in A&A. This version replaces the previous one

Published
2020
Full Text
View/download PDF

17. The ALPINE-ALMA [CII] survey: Survey strategy, observations and sample properties of 118 star-forming galaxies at $4 < z < 6$

Author

M. Bethermin, Carlotta Gruppioni, Shoubaneh Hemmati, Lin Yan, G. Zamorani, Michele Ginolfi, Andreas L. Faisst, E. Zucca, Fabian Walter, G. Lagache, Francesca Pozzi, F. Loiacono, Edo Ibar, Médéric Boquien, Ricardo Amorín, Nick Scoville, Daniel Schaerer, Anton M. Koekemoer, Y. Khusanova, Pascal Oesch, Dominik Riechers, Desika Narayanan, Andrea Cimatti, John D. Silverman, Nimish P. Hathi, Sune Toft, Brian C. Lemaux, Livia Vallini, Chiara Mancini, Miroslava Dessauges-Zavadsky, H. Mendez-Hernandez, R. Thomas, L. Morselli, G. C. Jones, Mauro Giavalisco, L. A. M. Tasca, Paolo Cassata, Roberto Maiolino, Peter Capak, O. Le Fevre, M. Romano, D. Vergani, S. Bardelli, Margherita Talia, Seiji Fujimoto, Y. Fudamoto, 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 de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), 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), ALPINE Team, 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 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), 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), Le Fevre, O., Bethermin, M., Faisst, A., Jones, G. C., Capak, P., Cassata, P., Silverman, J. D., Schaerer, D., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Dessauges-Zavadsky, M., Giavalisco, M., Hathi, N. P., Fudamoto, Y., Fujimoto, S., Ginolfi, M., Gruppioni, C., Hemmati, S., Ibar, E., Koekemoer, A., Khusanova, Y., Lagache, G., Lemaux, B. C., Loiacono, F., Maiolino, R., Mancini, C., Narayanan, D., Morselli, L., Mendez-Hernandez, H., Oesch, P. A., Pozzi, F., Romano, M., Riechers, D., Scoville, N., Talia, M., Tasca, L. A. M., Thomas, R., Toft, S., Vallini, L., Vergani, D., Walter, F., Zamorani, G., Zucca, E., Le Fevre O., Bethermin M., Faisst A., Jones G.C., Capak P., Cassata P., Silverman J.D., Schaerer D., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Dessauges-Zavadsky M., Giavalisco M., Hathi N.P., Fudamoto Y., Fujimoto S., Ginolfi M., Gruppioni C., Hemmati S., Ibar E., Koekemoer A., Khusanova Y., Lagache G., Lemaux B.C., Loiacono F., Maiolino R., Mancini C., Narayanan D., Morselli L., Mendez-Hernandez H., Oesch P.A., Pozzi F., Romano M., Riechers D., Scoville N., Talia M., Tasca L.A.M., Thomas R., Toft S., Vallini L., Vergani D., Walter F., Zamorani G., and Zucca E.

Subjects
formation [galaxies], Population, REDSHIFT, BILLION YEARS, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, COOL GAS, Far infrared, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, galaxies: formation, MAIN-SEQUENCE, FIELD, education, 010303 astronomy & astrophysics, Reionization, BLACK-HOLES, evolution [galaxies], Astrophysics::Galaxy Astrophysics, Physics, EVOLUTION SURVEY COSMOS, education.field_of_study, 010308 nuclear & particles physics, James Webb Space Telescope, Astronomy and Astrophysics, FRAMEWORK, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, C II EMISSION, SIMULATIONS, Reference sample, Space and Planetary Science, galaxies: star formation, Spectral energy distribution, Astrophysics::Earth and Planetary Astrophysics, star formation [galaxies], galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The ALMA-ALPINE [CII] survey is aimed at characterizing the properties of a sample of normal star-forming galaxies (SFGs). The ALMA Large Program to INvestigate (ALPINE) features 118 galaxies observed in the [CII]-158$\mu$m line and far infrared (FIR) continuum emission during the period of rapid mass assembly, right after the end of the HI reionization, at redshifts of 45). Based on a visual inspection of the [CII] data cubes together with the large wealth of ancillary data, we find a surprisingly wide range of galaxy types, including 40% that are mergers, 20% extended and dispersion-dominated, 13% compact, and 11% rotating discs, with the remaining 16% too faint to be classified. This diversity indicates that a wide array of physical processes must be at work at this epoch, first and foremost, those of galaxy mergers. This paper sets a reference sample for the gas distribution in normal SFGs at 4, Comment: 20 pages, 13 figures, 1 table, accepted by A&A

Published
2020
Full Text
View/download PDF

18. The properties of He IIλ1640 emitters at z ∼ 2.5-5 from the VANDELS survey

Author

Nimish P. Hathi, Casey Papovich, M. Mirabelli, Johan P. U. Fynbo, Daniel Schaerer, Marco Castellano, Lucia Pozzetti, Adriano Fontana, G. Zamorani, O. Cucciati, B. Garilli, M. Bolzonella, Lucia Guaita, Ross J. McLure, Angela Bongiorno, Margherita Talia, F. Marchi, Adriana Gargiulo, T. Hutchison, Laura Pentericci, D. J. McLeod, Raffaella Schneider, A. Saxena, Ricardo Amorín, A. C. Carnall, Fergus Cullen, Anton M. Koekemoer, Saxena A., Pentericci L., Mirabelli M., Schaerer D., Schneider R., Cullen F., Amorin R., Bolzonella M., Bongiorno A., Carnall A.C., Castellano M., Cucciati O., Fontana A., Fynbo J.P.U., Garilli B., Gargiulo A., Guaita L., Hathi N.P., Hutchison T.A., Koekemoer A.M., Marchi F., Mcleod D.J., Mclure R.J., Papovich C., Pozzetti L., Talia M., and Zamorani G.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Photon, Stellar population, Metallicity, astro-ph.GA, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Computer Science::Computational Geometry, 01 natural sciences, galaxies: high-redshift, Ionization, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Line (formation), Physics, galaxies: evolution, 010308 nuclear & particles physics, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Stars, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), astro-ph.CO, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Strong He II emission is produced by low-metallicity stellar populations. Here, we aim to identify and study a sample of He II $��1640$-emitting galaxies at redshifts of $z \sim 2.5-5$ in the deep VANDELS spectroscopic survey.. We identified a total of 33 Bright He II emitters (S/N > 2.5) and 17 Faint emitters (S/N < 2.5) in the VANDELS survey and used the available deep multi-wavelength data to study their physical properties. After identifying seven potential AGNs in our sample and discarding them from further analysis, we divided the sample of \emph{Bright} emitters into 20 \emph{Narrow} (FWHM < 1000 km s$^{-1}$) and 6 \emph{Broad} (FWHM > 1000 km s$^{-1}$) He II emitters. We created stacks of Faint, Narrow, and Broad emitters and measured other rest-frame UV lines such as O III] and C III] in both individual galaxies and stacks. We then compared the UV line ratios with the output of stellar population-synthesis models to study the ionising properties of He II emitters. We do not see a significant difference between the stellar masses, star-formation rates, and rest-frame UV magnitudes of galaxies with He II and no He II emission. The stellar population models reproduce the observed UV line ratios from metals in a consistent manner, however they under-predict the total number of \heii ionising photons, confirming earlier studies and suggesting that additional mechanisms capable of producing He II are needed, such as X-ray binaries or stripped stars. The models favour subsolar metallicities ($\sim0.1Z_\odot$) and young stellar ages ($10^6 - 10^7$ years) for the He II emitters. However, the metallicity measured for He II emitters is comparable to that of non-He II emitters at similar redshifts. We argue that galaxies with He II emission may have undergone a recent star-formation event, or may be powered by additional sources of He II ionisation., 21 pages, 11 figures (including appendix), Accepted for publication in A&A

Published
2020
Full Text
View/download PDF

19. Timing the earliest quenching events with a robust sample of massive quiescent galaxies at 2 < z < 5

Author

Andrea Cimatti, Fergus Cullen, Adriano Fontana, Marco Castellano, Vivienne Wild, Lucia Pozzetti, Adriana Gargiulo, James Dunlop, Matt J. Jarvis, O. Cucciati, A. Calabrò, Ross J. McLure, D. J. McLeod, S. Walker, A. C. Carnall, Laura Pentericci, Ricardo Amorín, G. Zamorani, M. Bolzonella, B. Garilli, Anton M. Koekemoer, Nimish P. Hathi, Carnall A.C., Walker S., McLure R.J., Dunlop J.S., McLeod D.J., Cullen F., Wild V., Amorin R., Bolzonella M., Castellano M., Cimatti A., Cucciati O., Fontana A., Gargiulo A., Garilli B., Jarvis M.J., Pentericci L., Pozzetti L., Zamorani G., Calabro A., Hathi N.P., Koekemoer A.M., and University of St Andrews. School of Physics and Astronomy

Subjects
statistical [Methods], astro-ph.GA, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, star formation [Galaxies], Methods statistical, 0103 physical sciences, QB Astronomy, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, QB, Physics, methods: statistical, 010308 nuclear & particles physics, Astronomy and Astrophysics, 3rd-DAS, evolution [Galaxies], Astrophysics - Astrophysics of Galaxies, Galaxy, QC Physics, Space and Planetary Science, galaxies: star formation, galaxies: evolution
Abstract

We present a sample of 151 massive ($M_* > 10^{10}\mathrm{M_\odot}$) quiescent galaxies at $2 < z < 5$, based on a sophisticated Bayesian spectral energy distribution fitting analysis of the CANDELS UDS and GOODS-South fields. Our sample includes a robust sub-sample of 61 objects for which we confidently exclude low-redshift and star-forming solutions. We identify 10 robust objects at $z>3$, of which 2 are at $z>4$. We report formation redshifts, demonstrating that the oldest objects formed at $z > 6$, however individual ages from our photometric data have significant uncertainties, typically $\sim0.5$ Gyr. We demonstrate that the UVJ colours of the quiescent population evolve with redshift at $z>3$, becoming bluer and more similar to post-starburst galaxies at lower redshift. Based upon this we construct a model for the time-evolution of quiescent galaxy UVJ colours, concluding that the oldest objects are consistent with forming the bulk of their stellar mass at $z\sim6-7$ and quenching at $z\sim5$. We report spectroscopic redshifts for two of our objects at $z=3.440$ and $3.396$, which exhibit extremely weak Ly$\alpha$ emission in ultra-deep VANDELS spectra. We calculate star-formation rates based on these line fluxes, finding that these galaxies are consistent with our quiescent selection criteria, provided their Ly$\alpha$ escape fractions are $>3$ and $>10$ per cent respectively. We finally report that our highest-redshift robust object exhibits a continuum break at $\lambda\sim7000$A in a spectrum from VUDS, consistent with our photometric redshift of $z_\mathrm{phot}=4.72^{+0.06}_{-0.04}$. If confirmed as quiescent this object would be the highest-redshift known quiescent galaxy. To obtain stronger constraints on the times of the earliest quenching events, high-SNR spectroscopy must be extended to $z\gtrsim3$ quiescent objects., Comment: 14 pages, 8 figures, MNRAS accepted

Published
2020
Full Text
View/download PDF

20. The ALPINE-ALMA [CII] survey: Circumgalactic medium pollution and gas mixing by tidal stripping in a merging system at z ∼4.57

Author

Roberto Maiolino, Andreas L. Faisst, Brian C. Lemaux, John D. Silverman, G. C. Jones, Paolo Cassata, Y. Fudamoto, G. Zamorani, L. Morselli, Matthieu Béthermin, Peter Capak, Carlotta Gruppioni, O. Le Fevre, S. Carniani, Seiji Fujimoto, Nimish P. Hathi, D. Vergani, Michele Ginolfi, Lin Yan, O. Cucciati, Margherita Talia, S. Bardelli, Pascal Oesch, Daniel Schaerer, Lori M. Lubin, Roy R. Gal, Debora Pelliccia, Miroslava Dessauges-Zavadsky, Ginolfi, M., Jones, G. C., Bethermin, M., Faisst, A., Lemaux, B. C., Schaerer, D., Fudamoto, Y., Oesch, P., Dessauges-Zavadsky, M., Fujimoto, S., Carniani, Stefano, Le Fevre, O., Cassata, P., Silverman, J. D., Capak, P., Yan, L., Bardelli, S., Cucciati, O., Gal, R., Gruppioni, C., Hathi, N. P., Lubin, L., Maiolino, R., Morselli, L., Pelliccia, D., Talia, M., Vergani, D., Zamorani, G., 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), Ginolfi M., Jones G.C., Bethermin M., Faisst A., Lemaux B.C., Schaerer D., Fudamoto Y., Oesch P., Dessauges-Zavadsky M., Fujimoto S., Carniani S., Le Fevre O., Cassata P., Silverman J.D., Capak P., Yan L., Bardelli S., Cucciati O., Gal R., Gruppioni C., Hathi N.P., Lubin L., Maiolino R., Morselli L., Pelliccia D., Talia M., Vergani D., and Zamorani G.

Subjects
Stellar mass, REDSHIFT, Continuum (design consultancy), interaction [Galaxies], Flux, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, STAR-FORMATION, Gravitation, high-redshift [Galaxies], C-II LINE, Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, METAL ENRICHMENT, 0103 physical sciences, ISM [Galaxies], galaxies: interactions, galaxies: formation, 010303 astronomy & astrophysics, MASS-RATIO, Astrophysics::Galaxy Astrophysics, Envelope (waves), Intergalactic medium, Physics, interactions [galaxies], 010308 nuclear & particles physics, Star formation, GALAXY MERGERS, Astronomy and Astrophysics, DUST CONTENT, evolution [Galaxies], formation [Galaxies], MOLECULAR GAS, EVOLUTION, Galaxy, Baryon, Galaxies: interaction, 13. Climate action, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, intergalactic medium, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], LAMBDA-CDM, galaxies: ISM
Abstract

We present ALMA observations of a merging system atz ∼ 4.57, observed as a part of the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) survey. Combining ALMA [CII]158 μm and far-infrared continuum data with multi-wavelength ancillary data, we find that the system is composed of two massive (M⋆ ≳ 1010 M⊙) star-forming galaxies experiencing a major merger (stellar mass ratiormass ≳ 0.9) at close spatial (∼13 kpc; projected) and velocity (Δv < 300 km s−1) separations, and two additional faint narrow [CII]-emitting satellites. The overall system belongs to a larger scale protocluster environment and is coincident to one of its overdensity peaks. Additionally, ALMA reveals the presence of [CII] emission arising from a circumgalactic gas structure, extending up to a diameter-scale of ∼30 kpc. Our morpho-spectral decomposition analysis shows that about 50% of the total flux resides between the individual galaxy components, in a metal-enriched gaseous envelope characterised by a disturbed morphology and complex kinematics. Similarly to observations of shock-excited [CII] emitted from tidal tails in local groups, our results can be interpreted as a possible signature of interstellar gas stripped by strong gravitational interactions, with a possible contribution from material ejected by galactic outflows and emission triggered by star formation in small faint satellites. Our findings suggest that mergers could be an efficient mechanism of gas mixing in the circumgalactic medium around high-zgalaxies, and thus play a key role in the galaxy baryon cycle at early epochs.

Published
2020
Full Text
View/download PDF

21. UV and Ly$\alpha$ luminosity functions of galaxies and star formation rate density at the end of HI reionization from the VIMOS UltraDeep Survey (VUDS)

Author

Paolo Cassata, F. Marchi, Marco Castellano, Laurence Tresse, Nimish P. Hathi, O. Cucciati, Janine Pforr, O. Le Fevre, Daniel Schaerer, Anton M. Koekemoer, Mauro Giavalisco, L. A. M. Tasca, Y. Khusanova, Ricardo Amorín, S. Bardelli, Laura Pentericci, R. Thomas, B. Ribeiro, D. Maccagni, Brian C. Lemaux, Daniela Vergani, Letizia P. Cassarà, E. Zucca, G. Zamorani, Andrea Cimatti, V. Le Brun, O. Ilbert, B. Garilli, 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 de Recherche Astrophysique de Lyon (CRAL), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Khusanova Y., Le Fevre O., Cassata P., Cucciati O., Lemaux B.C., Tasca L.A.M., Thomas R., Garilli B., Le Brun V., MacCagni D., Pentericci L., Zamorani G., Amorin R., Bardelli S., Castellano M., Cassara L.P., Cimatti A., Giavalisco M., Hathi N.P., Ilbert O., Koekemoer A.M., Marchi F., Pforr J., Ribeiro B., Schaerer D., Tresse L., Vergani D., and Zucca E.

Subjects
galaxies: high-redshift, galaxies: evolution, galaxies: formation, galaxies: star formation, dark ages, reionization, first stars, galaxies: luminosity function, mass function, Population, first stars, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Luminosity, 0103 physical sciences, Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, dark ages, education, 010303 astronomy & astrophysics, Reionization, Astrophysics::Galaxy Astrophysics, Luminosity function (astronomy), Physics, education.field_of_study, 010308 nuclear & particles physics, Galaxies: luminosity function, mass function, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Dark ages, reionization, first star, galaxies: luminosity function, Space and Planetary Science, mass function, reionization, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Equivalent width, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We establish a robust statistical description of the star-forming galaxy population at the end of cosmic HI reionization ($5.0\le{}z\le6.6$) from a large sample of 52 galaxies with spectroscopically confirmed redshifts from the VIMOS UltraDeep Survey. We identify galaxies with Ly$\alpha$ either in absorption or in emission, at variance with most spectroscopic samples in the literature where Ly$\alpha$ emitters dominate. We find that star-forming galaxies at these redshifts are distributed along a main sequence in the stellar mass vs. SFR plane. We report a flat evolution of the sSFR(z) in 32. The bright end of the Ly$\alpha$ luminosity function has a high number density, indicating a significant star formation activity concentrated in the brightest Ly$\alpha$ emitters (LAE) at these redshifts. LAE with EW>25\AA ~contribute to about 75\% of the total UV-derived SFRD. While our analysis favors a low dust content in 5.0, Comment: 27 pages, submitted to A&A

Published
2020
Full Text
View/download PDF

22. The ALPINE-ALMA [CII] survey: Data processing, catalogs, and statistical source properties

Author

Dominik A. Riechers, Brian C. Lemaux, Sune Toft, Livia Vallini, Daniela Vergani, Nimish P. Hathi, E. Zucca, S. Bardelli, Y. Khusanova, Ricardo Amorín, Paolo Cassata, Lin Yan, Seiji Fujimoto, Andreas L. Faisst, Iary Davidzon, Y. Fudamoto, Michele Ginolfi, O. Le Fèvre, Daniel Schaerer, G. C. Jones, Carlotta Gruppioni, Pascal Oesch, G. Zamorani, Matthieu Béthermin, Edo Ibar, Margherita Talia, C. Moreau, Francesca Pozzi, Médéric Boquien, F. Loiacono, John D. Silverman, Anton M. Koekemoer, Guilaine Lagache, Peter Capak, Andrea Cimatti, Miroslava Dessauges-Zavadsky, 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 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), Bethermin M., Fudamoto Y., Ginolfi M., Loiacono F., Khusanova Y., Capak P.L., Cassata P., Faisst A., Le Fevre O., Schaerer D., Silverman J.D., Yan L., Amorin R., Bardelli S., Boquien M., Cimatti A., Davidzon I., Dessauges-Zavadsky M., Fujimoto S., Gruppioni C., Hathi N.P., Ibar E., Jones G.C., Koekemoer A.M., Lagache G., Lemaux B.C., Moreau C., Oesch P.A., Pozzi F., Riechers D.A., Talia M., Toft S., Vallini L., Vergani D., Zamorani G., Zucca E., 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 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), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Bethermin, M., Fudamoto, Y., Ginolfi, M., Loiacono, F., Khusanova, Y., Capak, P. L., Cassata, P., Faisst, A., Le Fevre, O., Schaerer, D., Silverman, J. D., Yan, L., Amorin, R., Bardelli, S., Boquien, M., Cimatti, A., Davidzon, I., Dessauges-Zavadsky, M., Fujimoto, S., Gruppioni, C., Hathi, N. P., Ibar, E., Jones, G. C., Koekemoer, A. M., Lagache, G., Lemaux, B. C., Moreau, C., Oesch, P. A., Pozzi, F., Riechers, D. A., Talia, M., Toft, S., Vallini, L., Vergani, D., Zamorani, G., and Zucca, E.

Subjects
submillimeter: galaxies, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Continuum (design consultancy), FOS: Physical sciences, Astrophysics, star formation [Galaxies], 01 natural sciences, Luminosity, high-redshift [Galaxies], galaxies [Submillimeter], Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, Cosmic infrared background, ISM [Galaxies], 0103 physical sciences, 010303 astronomy & astrophysics, Photometric redshift, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Atacama Large Millimeter Array, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), galaxies: star formation, Spectral energy distribution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], galaxies: ISM, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The ALPINE-ALMA large program targets the [CII] 158 $\mu$m line and the far-infrared continuum in 118 spectroscopically confirmed star-forming galaxies between z=4.4 and z=5.9. It represents the first large [CII] statistical sample built in this redshift range. We present details of the data processing and the construction of the catalogs. We detected 23 of our targets in the continuum. To derive accurate infrared luminosities and obscured star formation rates, we measured the conversion factor from the ALMA 158 $\mu$m rest-frame dust continuum luminosity to the total infrared luminosity (L$_{\rm IR}$) after constraining the dust spectral energy distribution by stacking a photometric sample similar to ALPINE in ancillary single-dish far-infrared data. We found that our continuum detections have a median L$_{\rm IR}$ of 4.4$\times 10^{11}$ L$_\odot$. We also detected 57 additional continuum sources in our ALMA pointings. They are at lower redshift than the ALPINE targets, with a mean photometric redshift of 2.5$\pm$0.2. We measured the 850 $\mu$m number counts between 0.35 and 3.5 mJy, improving the current interferometric constraints in this flux density range. We found a slope break in the number counts around 3 mJy with a shallower slope below this value. More than 40 % of the cosmic infrared background is emitted by sources brighter than 0.35 mJy. Finally, we detected the [CII] line in 75 of our targets. Their median [CII] luminosity is 4.8$\times$10$^8$ L$_\odot$ and their median full width at half maximum is 252 km/s. After measuring the mean obscured SFR in various [CII] luminosity bins by stacking ALPINE continuum data, we find a good agreement between our data and the local and predicted SFR-L$_{\rm [CII]}$ relations of De Looze et al. (2014) and Lagache et al. (2018)., Comment: 44 pages, 29 figures, 14 tables, accepted by A&A, ALPINE products released at https://cesam.lam.fr/a2c2s/, luminosities in table B2 corrected

Published
2020
Full Text
View/download PDF

23. The ALPINE-ALMA [CII] survey - The nature, luminosity function, and star formation history of dusty galaxies up to z ≃ 6

Author

Pascal Oesch, Paolo Cassata, Dominik A. Riechers, Giulia Rodighiero, Peter Capak, E. Zucca, Nimish P. Hathi, Daniel Schaerer, Andrea Cimatti, G. Zamorani, Andreas L. Faisst, Michele Ginolfi, O. Le Fèvre, Seiji Fujimoto, John D. Silverman, Margherita Talia, G. C. Jones, Carlotta Gruppioni, Guilaine Lagache, Matthieu Béthermin, R. Carraro, Y. Khusanova, M. Romano, S. Bardelli, Livia Vallini, Francesca Pozzi, F. Loiacono, Brian C. Lemaux, Miroslava Dessauges-Zavadsky, Lin Yan, Daniela Vergani, Anton M. Koekemoer, Médéric Boquien, INAF - Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), 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), California Institute of Technology (CALTECH), INAF - Osservatorio Astronomico di Padova (OAPD), Université de Genève = University of Geneva (UNIGE), The University of Tokyo (UTokyo), Universidad de Antofagasta, Universidad de Valparaiso [Chile], INAF - Osservatorio Astrofisico di Arcetri (OAA), University of Copenhagen = Københavns Universitet (UCPH), Space Telescope Science Institute (STSci), University of Cambridge [UK] (CAM), University of California (UC), Cornell University [New York], Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Università degli Studi di Padova = University of Padua (Unipd), Leiden Observatory [Leiden], Universiteit Leiden, Gruppioni, C., Bethermin, M., Loiacono, F., Le Fevre, O., Capak, P., Cassata, P., Faisst, A. L., Schaerer, D., Silverman, J., Yan, L., Bardelli, S., Boquien, M., Carraro, R., Cimatti, A., Dessauges-Zavadsky, M., Ginolfi, M., Fujimoto, S., Hathi, N. P., Jones, G. C., Khusanova, Y., Koekemoer, A. M., Lagache, G., Lemaux, B. C., Oesch, P. A., Pozzi, F., Riechers, D. A., Rodighiero, G., Romano, M., Talia, M., Vallini, L., Vergani, D., Zamorani, G., Zucca, E., Université de Genève (UNIGE), University of Copenhagen = Københavns Universitet (KU), University of California, Universita degli Studi di Padova, Universiteit Leiden [Leiden], Gruppioni C., Bethermin M., Loiacono F., Le Fevre O., Capak P., Cassata P., Faisst A.L., Schaerer D., Silverman J., Yan L., Bardelli S., Boquien M., Carraro R., Cimatti A., Dessauges-Zavadsky M., Ginolfi M., Fujimoto S., Hathi N.P., Jones G.C., Khusanova Y., Koekemoer A.M., Lagache G., Lemaux B.C., Oesch P.A., Pozzi F., Riechers D.A., Rodighiero G., Romano M., Talia M., Vallini L., Vergani D., Zamorani G., Zucca E., ITA, USA, FRA, CHL, DNK, JPN, NLD, and CHE

Subjects
submillimeter: galaxies, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Continuum (design consultancy), FOS: Physical sciences, observation [Cosmology], Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmology: observation, high-redshift [Galaxies], galaxies [Submillimeter], Settore FIS/05 - Astronomia e Astrofisica, galaxies: high-redshift, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Luminosity function (astronomy), Photometric redshift, Physics, 010308 nuclear & particles physics, Star formation, Astronomy and Astrophysics, evolution [Galaxies], Astrophysics - Astrophysics of Galaxies, luminosity function [Galaxies], Galaxy, Redshift, galaxies: luminosity function, Space and Planetary Science, mass function, Astrophysics of Galaxies (astro-ph.GA), Mass function, cosmology: observations, Dark galaxy, Astrophysics::Earth and Planetary Astrophysics, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the detailed characterisation of a sample of 56 sources serendipitously detected in ALMA band 7, as part of the ALMA Large Program to INvestigate CII at Early Times (ALPINE) in COSMOS and ECDFS. These sources have been used to derive the total infrared luminosity function (LF) and to estimate the cosmic star formation rate density (SFRD) up to z=6. We have looked for counterparts in all the available multi-wavelength and photometric redshift catalogues, and in deeper near- and mid-IR source lists and maps, to identify optically dark sources with no matches in the public catalogues. Our ALMA blind survey allows us to push further the study of the nature and evolution of dusty galaxies at high-z, identifying luminous and massive sources to redshifts and faint luminosities never probed before by any far-infrared surveys. The ALPINE data are the first ones to sample the faint-end of the infrared LF, showing little evolution from z=2.5 to z=6, and a flat slope up to the highest redshifts. The SFRD obtained by integrating the luminosity function remains almost constant between z=2 and 6, and significantly higher than the optical/UV derivations, showing an important contribution of dusty galaxies and obscured star formation up to high-z. About 14 per cent of the ALPINE serendipitous continuum sources are optically+near-IR dark (six show a counterpart only in the mid-IR and no HST or near-IR identification, while two are detected as [CII] emitters at z=5). The six HST and near-IR dark galaxies with mid-IR counterpart contribute for about 17 per cent of the total SFRD at z=5 and dominate the high-mass end of the stellar mass function at z>3., 26 pages, 18 figures. Accepted for publication in A&A

Published
2020
Full Text
View/download PDF

24. The VANDELS survey: The relation between the UV continuum slope and stellar metallicity in star-forming galaxies at z ∼ 3

Author

M. Bolzonella, Fabio Fontanot, Nimish P. Hathi, Andrea Cimatti, P. Santini, Adriano Fontana, F. Mannucci, Laura Pentericci, G. Zamorani, Giovanni Cresci, Marco Castellano, A. Calabrò, A. Saxena, F. Marchi, M. Franco, Daniel Schaerer, Nicola Menci, Ricardo Amorín, Lizhi Xie, G. De Lucia, Johan P. U. Fynbo, Pascale Hibon, Margherita Talia, Ross J. McLure, Michaela Hirschmann, Fergus Cullen, Calabro A., Castellano M., Pentericci L., Fontanot F., Menci N., Cullen F., Mclure R., Bolzonella M., Cimatti A., Marchi F., Talia M., Amorin R., Cresci G., De Lucia G., Fynbo J., Fontana A., Franco M., Hathi N.P., Hibon P., Hirschmann M., Mannucci F., Santini P., Saxena A., Schaerer D., Xie L., and Zamorani G.

Subjects
Metallicity, Continuum (design consultancy), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Star (graph theory), 01 natural sciences, abundances [galaxies], 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, SPECTRAL-SYNTHESIS, FIELD, 010303 astronomy & astrophysics, evolution [galaxies], Astrophysics::Galaxy Astrophysics, Physics, HIERARCHICAL FORMATION, 010308 nuclear & particles physics, Galaxies: high-redshift, Galaxies: evolution, Astronomy and Astrophysics, GALACTIC STELLAR, stellar content [galaxies], Galaxies: stellar content, Astrophysics - Astrophysics of Galaxies, EVOLUTION, Galaxy, TO 2, CHEMICAL ENRICHMENT, LYMAN-BREAK GALAXIES, ULTRAVIOLET LUMINOSITY DENSITY, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), DUST OBSCURATION, Astrophysics::Earth and Planetary Astrophysics, high-redshift [galaxies], Galaxies: abundance
Abstract

The estimate of stellar metallicities (Z*) of high-z galaxies are of paramount importance in order to understand the complexity of dust effects and the reciprocal interrelations among stellar mass, dust attenuation, stellar age, and metallicity. Benefiting from uniquely deep FUV spectra of >500 star-forming galaxies at redshifts 2, Comment: 25 pages, 4 tables, 16 figures, and 5 Appendix subsections; accepted for publication in A&A

Published
2021
Full Text
View/download PDF

25. The VANDELS survey: Discovery of massive overdensities of galaxies at z > 2

Author

L. Guaita, M. Bolzonella, Anton M. Koekemoer, Lizhi Xie, O. Cucciati, P. Hibon, Laura Pentericci, Nimish P. Hathi, Ricardo Amorín, Emanuela Pompei, Lucia Pozzetti, R. C. Thomas, G. De Lucia, Adriana Gargiulo, G. Zamorani, F. Fontanot, M. Hirschmann, Anna Zoldan, M. Castellano, Margherita Talia, Franz E. Bauer, Ross J. McLure, Guaita L., Pompei E., Castellano M., Pentericci L., Cucciati O., Zamorani G., Zoldan A., Fontanot F., Bauer F.E., Amorin R., Bolzonella M., De Lucia G., Gargiulo A., Hathi N.P., Hibon P., Hirschmann M., Koekemoer A.M., McLure R., Pozzetti L., Talia M., Thomas R., and Xie L.

Subjects
Physics, Field (physics), 010308 nuclear & particles physics, Galaxies: high-redshift, Galaxies: kinematics and dynamics, Astronomy and Astrophysics, Context (language use), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Redshift, Stars, Gravitational potential, Galaxies: interaction, Space and Planetary Science, 0103 physical sciences, Cluster (physics), Outflow, Galaxies: clusters: general, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Context. The advent of deep, multi-wavelength surveys, together with the availability of extensive numerical simulations, now allow us for the systematic search and study of (proto)clusters and their surrounding environment as a function of redshift. Aims. We aim to define the environment and to identify overdensities in the VANDELS Chandra Deep Field-South (CDFS) and UKIDSS Ultra Deep Survey (UDS) fields. We want to investigate whether we can use Lyα emission to obtain additional information of the environment properties and whether Lyα emitters show different characteristics as a function of their environment. Methods. We estimated local densities using a three-dimensional algorithm which works in the RA-dec-redshift space. We took advantage of the physical parameters of all the sources in the VANDELS fields to study their properties as a function of environment. In particular, we focused on the rest-frame U − V color to evaluate the stage of evolution of the galaxies located in the overdensities and in the field. Then we selected a sample of 131 Lyα-emitting galaxies (EW(Lyα) > 0 Å), unbiased with respect to environmental density, from the first two seasons of the VANDELS survey to study their location with respect to the over- or under-dense environment and infer whether they are useful tracers of overdense regions. Results. We identify 13 (proto)cluster candidates in the CDFS and nine in the UDS at 2 < z < 4, based on photometric and spectroscopic redshifts from VANDELS and from all the available literature. No significant difference is observed in the rest-frame U − V color between field and galaxies located within the identified overdensities, but the star-forming galaxies in overdense regions tend to be more massive and to have low specific SFRs than in the field. We study the distribution of the VANDELS Lyα emitters (LAEVs) and we find that Lyα emitters lie preferentially outside of overdense regions as the majority of the galaxies with spectroscopic redshifts from VANDELS. The LAEVs in overdense regions tend to have low Lyα equivalent widths and low specific SFRs, and they also tend to be more massive than the LAEVs in the field. Their stacked Lyα profile shows a dominant red peak and a hint of a blue peak. There is evidence that their Lyα emission is more extended and offset with respect to the UV continuum. Conclusions. LAEVs are likely to be influenced by the environment. In fact, our results favour a scenario that implies outflows of low expansion velocities and high HI column densities for galaxies in overdense regions. An outflow with low expansion velocity could be related to the way galaxies are forming stars in overdense regions; the high HI column density can be a consequence of the gravitational potential of the overdensity. Therefore, Lyα-emitting galaxies can provide useful insights on the environment in which they reside.

Published
2020
Full Text
View/download PDF

26. The progeny of a Cosmic Titan: a massive multi-component proto-supercluster in formation at $z=2.45$ in VUDS

Author

Letizia P. Cassarà, V. Le Brun, Paolo Cassata, Eros Vanzella, Mara Salvato, Daniela Vergani, O. Le Fèvre, Nimish P. Hathi, L. Pentericci, E. Zucca, Anton M. Koekemoer, L. M. Lubin, D. Maccagni, Janine Pforr, Ricardo Amorín, Lidia Tasca, Bianca Garilli, Andrea Cimatti, Olga Cucciati, K. G. Lee, Brian C. Lemaux, S. Bardelli, Margherita Talia, G. Zamorani, R. C. Thomas, 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., Lemaux, B.C., Zamorani, G., Le Fèvre, O., Tasca, L.A.M., Hathi, N.P., Lee, K.-G., Bardelli, S., Cassata, P., Garilli, B., Le Brun, V., Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zucca, E., Lubin, L.M., Amorin, R., Cassarà, L.P., Cimatti, A., Talia, M., Vergani, D., Koekemoer, A., Pforr, J., Salvato, M., 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
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Field (physics), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Cosmology: observation, 01 natural sciences, Supercluster, galaxies: high-redshift, 0103 physical sciences, Spectroscopy, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Line-of-sight, 010308 nuclear & particles physics, Velocity dispersion, Astronomy and Astrophysics, Virial mass, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Space and Planetary Science, galaxies: clusters: general, Astrophysics of Galaxies (astro-ph.GA), cosmology: observations, large-scale structure of Universe, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Cosmology: observations, Galaxies: clusters: general, Galaxies: high-redshift, Large-scale structure of Universe, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

[Abridged] We unveil the complex shape of a proto-supercluster at z~2.45 in the COSMOS field using the spectroscopic redshifts of the VIMOS Ultra-Deep Survey (VUDS), complemented by the zCOSMOS-Deep sample and high-quality photometric redshifts. The method relies on a 2D Voronoi tessellation in overlapping redshift slices that is converted into a 3D density field. The galaxy distribution is constructed using a statistical treatment of spectroscopic and photometric redshifts. We identify a proto-supercluster, dubbed "Hyperion" for its immense size and mass, which extends over a volume of ~60x60x150 comoving Mpc^3 and has an estimated total mass of ~4.8x 10^15 M_sun. This immensely complex structure contains at least 7 density peaks within 2.4 < z < 2.5, connected by filaments. Based on the peaks average matter density, we estimate their total mass, M_tot, and find a range of masses from ~0.1x10^14 M_sun to ~2.7x10^14 M_sun. By using spectroscopic members of each peak, we obtain the velocity dispersion of the galaxies in the peaks, and then their virial mass M_vir (under the strong assumption that they are virialised). The agreement between M_vir and M_tot is surprisingly good, considering that almost all the peaks are probably not yet virialised. According to the spherical collapse model, the peaks have already started or are about to start collapsing, and they are all predicted to be virialised by redshift z~0.8-1.6. We finally perform a careful comparison with the literature, given that smaller components of this proto-supercluster had previously been identified using heterogeneous galaxy samples. With VUDS, we obtain a panoramic view of this large structure, that encompasses, connects, and considerably expands in a homogeneous way on all previous detections of the various sub-components. This provides us the unique possibility to study a rich supercluster in formation., 22 pages, 13 figures, accepted to be published in A&A, very minor corrections after language editing

Published
2018
Full Text
View/download PDF

27. The VIMOS Ultra Deep Survey: Nature, ISM properties, and ionizing spectra of CIII]λ1909 emitters at z = 2-4

Author

Laura Pentericci, G. Zamorani, Eros Vanzella, Lucia Guaita, Brian C. Lemaux, S. Bardelli, L. A. M. Tasca, O. Le Fevre, Andrea Grazian, E. Zucca, Kimihiko Nakajima, Margherita Talia, Nimish P. Hathi, Ricardo Amorín, Daniel Schaerer, Nakajima K., Schaerer D., Le Fevre O., Amorin R., Talia M., Lemaux B.C., Tasca L.A.M., Vanzella E., Zamorani G., Bardelli S., Grazian A., Guaita L., Hathi N.P., Pentericci L., Zucca E., European Southern Observatory (ESO), 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), 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 Roma (OAR), Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astronomico di Bologna (OABO), University of California [Davis] (UC Davis), University of California, Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), INAF - Osservatorio Astronomico di Brera (OAB), 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), and University of California (UC)

Subjects
Active galactic nucleus, Stellar population, Metallicity, FOS: Physical sciences, Photoionization, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Star formation, Galaxies: high-redshift, Galaxies: evolution, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Interstellar medium, Galaxies: ISM, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Galaxies: abundance
Abstract

Context: Ultraviolet (UV) emission-line spectra are used to spectroscopically confirm high-z galaxies and increasingly also to determine their physical properties. Aims: To interpret the observed UV spectra of distant galaxies in terms of the dominant radiation field and the physical condition of the interstellar medium. Methods: We construct a large grid of photoionization models and derive new spectral UV line diagnostics using equivalent widths (EWs) of CIII]1909, CIV1549 and the line ratios of CIII], CIV, and HeII1640 recombination lines. We apply these diagnostics to a sample of 450 CIII]-emitting galaxies at z=2-4 previously identified in the VIMOS Ultra Deep Survey. Results: We show that the average star-forming galaxy (EW(CIII])~2A) is well described by stellar photoionization from single and binary stars. The inferred metallicity and ionization parameter is typically Z=0.3-0.5Zsun and logU=-2.7 to -3, in agreement with earlier works at similar redshifts. The models also indicate an average age of 50-200Myr since the beginning of the current star-formation, and an ionizing photon production rate, xi_ion, of log(xi_ion/[Hz/erg])~25.3-25.4. Among the sources with EW(CIII])=10-20A, ~30% are likely dominated by AGNs. Their derived metallicity is low, Z=0.02-0.2Zsun, and the ionization parameter higher (logU=-1.7). To explain the average UV observations of the strongest but rarest CIII] emitters (EW(CIII])>20A), we find that stellar photoionization is clearly insufficient. A radiation field consisting of a mix of a young stellar population (log(xi_ion/[Hz/erg])~25.7) plus an AGN component is required. Furthermore an enhanced C/O abundance ratio is needed for metallicities Z=0.1-0.2Zsun and logU=-1.7 to -1.5. Conclusions: The UV diagnostics we propose should serve as an important basis for the interpretation of observations of high-redshift galaxies. [abridged], 27 pages, 18 figures. Accepted for publication in A&A

Published
2018
Full Text
View/download PDF

28. The VIMOS Ultra-Deep Survey: evidence for AGN feedback in galaxies with CIII]-λ1908 Å emission 10.8 to 12.5 Gyr ago

Author

Nimish P. Hathi, G. Zamorani, Lucia Guaita, E. Zucca, O. Le Fevre, Kimihiko Nakajima, P. Cassata, B. Garilli, James Dunlop, L. A. M. Tasca, S. Bardelli, Daniel Schaerer, Eros Vanzella, F. Marchi, Andrea Cimatti, Margherita Talia, Laura Pentericci, D. Maccagni, Ricardo Amorín, Brian C. Lemaux, Mauro Giavalisco, 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), INAF - Osservatorio Astronomico di Roma (OAR), Istituto Nazionale di Astrofisica (INAF), Institut de recherche et d'enseignement sur la négociation (IRENE), ESSEC Business School, INAF - Osservatorio Astronomico di Bologna (OABO), 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), Essec Business School, Le Fevre O., Lemaux B.C., Nakajima K., Schaerer D., Talia M., Zamorani G., Cassata P., Garilli B., MacCagni D., Pentericci L., Tasca L.A.M., Zucca E., Amorin R., Bardelli S., Cimatti A., Giavalisco M., Guaita L., Hathi N.P., Marchi F., Vanzella E., Vergani D., and Dunlop J.

Subjects
Galaxy: evolution, Physics, education.field_of_study, 010308 nuclear & particles physics, Star formation, Population, Galaxies: Formation, Galaxies: High-redshift, Galaxies: Star formation, Galaxy: Evolution, Astronomy and Astrophysics, Astrophysics, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, Galaxy, Redshift, Spectral line, galaxies: high-redshift, Space and Planetary Science, galaxies: star formation, 0103 physical sciences, Galaxy formation and evolution, galaxies: formation, Emission spectrum, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], education, 010303 astronomy & astrophysics, Line (formation)
Abstract

We analyze the CIII]-1908\AA emission properties in a sample of 3899 star-forming galaxies (SFGs) at 23\AA, including 20% with 310\AA. A significant fraction of 1.2% of SFGs presents strong CIII] emission 2010^10 MSun at z~3 into the population of quiescent galaxies observed at redshift z~1-2., Comment: 19 pages, 14 figures, submitted to A&A

Published
2019
Full Text
View/download PDF

29. The VIMOS Ultra Deep Survey First Data Release: spectra and spectroscopic redshifts of 698 objects up to z~6 in CANDELS

Author

C. Moreau, A. Durkalec, S. Paltani, Mara Salvato, M. Castellano, Nimish P. Hathi, E. Vanzella, Adriano Fontana, B. Garilli, S. Bardelli, G. Zamorani, James Dunlop, B. Ribeiro, Yoshiaki Taniguchi, Peter Capak, O. Cucciati, A. Grazian, Marco Scodeggio, Paolo Cassata, P. W. Wang, Ricardo Amorín, V. Sommariva, S. de la Torre, L. Guaita, Yannick Mellier, Laura Pentericci, Anton M. Koekemoer, Margherita Talia, Letizia P. Cassarà, L. Tresse, Rajat M. Thomas, C. Lopez-Sanjuan, Stéphane Charlot, V. Le Brun, O. Ilbert, Nick Scoville, D. Maccagni, M. Giavalisco, E. Zucca, Daniel Schaerer, Janine Pforr, Sotiria Fotopoulou, L. A. M. Tasca, O. Le Fevre, T. Contini, Brian Lemaux, D. Vergani, A. Cimatti, 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), Tasca, L.A.M., Le Fèvre, O., Ribeiro, B., Thomas, R., Moreau, C., Cassata, P., Garilli, B., Le Brun, V., Lemaux, B.C., Maccagni, D., Pentericci, L., Schaerer, D., Vanzella, E., Zamorani, G., Zucca, E., Amorin, R., Bardelli, S., Cassarà, L.P., Castellano, M., Cimatti, A., Cucciati, O., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Paltani, S., Pforr, J., Scodeggio, M., Sommariva, V., Talia, M., Tresse, L., Vergani, D., Capak, P., Charlot, S., Contini, T., De La Torre, S., Dunlop, J., Fotopoulou, S., Guaita, L., Koekemoer, A., López-Sanjuan, C., Mellier, Y., Salvato, M., Scoville, N., Taniguchi, Y., and Wang, P.W.

Subjects
Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Star (graph theory), Surveys, 01 natural sciences, Cosmology: observation, Spectral line, Galaxies: distances and redshifts, 0103 physical sciences, Galaxies: distances and redshift, [INFO]Computer Science [cs], education, Survey, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, education.field_of_study, 010308 nuclear & particles physics, Star formation, Cosmology: observations, Galaxies: high-redshift, Catalogs, Astronomy and Astrophysics, Space and Planetary Science, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Stars, Astrophysics of Galaxies (astro-ph.GA), Spectral energy distribution, Catalog, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

This paper describes the first data release (DR1) of the VIMOS Ultra Deep Survey (VUDS). The DR1 includes all low-resolution spectroscopic data obtained in 276.9 arcmin2 of the CANDELS-COSMOS and CANDELS-ECFDS survey areas, including accurate spectroscopic redshifts z_spec and individual spectra obtained with VIMOS on the ESO-VLT. A total of 698 objects have a measured redshift, with 677 galaxies, two type-I AGN and a small number of 19 contaminating stars. The targets of the spectroscopic survey are selected primarily on the basis of their photometric redshifts to ensure a broad population coverage. About 500 galaxies have z_spec>2, 48 with z_spec>4, and the highest reliable redshifts reach beyond z_spec=6. This dataset approximately doubles the number of galaxies with spectroscopic redshifts at z>3 in these fields. We discuss the general properties of the sample in terms of the spectroscopic redshift distribution, the distribution of Lyman-alpha equivalent widths, and physical properties including stellar masses M_star and star formation rates (SFR) derived from spectral energy distribution fitting with the knowledge of z_spec. We highlight the properties of the most massive star-forming galaxies, noting the large range in spectral properties, with Lyman-alpha in emission or in absorption, and in imaging properties with compact, multi-component or pair morphologies. We present the catalogue database and data products. All data are publicly available and can be retrieved from a dedicated query-based database available at http://cesam.lam.fr/vuds., 11 pages, 6 figures, submitted to A&A

Published
2017
Full Text
View/download PDF

30. Characterization of star-forming dwarf galaxies at 0.1 ≲ z ≲ 0.9 in VUDS: Probing the low-mass end of the mass-metallicity relation

Author

Marco Castellano, B. Garilli, Nimish P. Hathi, Daniel Schaerer, B. Ribeiro, Thierry Contini, O. Le Fevre, Brian C. Lemaux, Lucia Guaita, E. Zucca, L. A. M. Tasca, S. Bardelli, S. de Barros, Enrique Pérez-Montero, Anton M. Koekemoer, Margherita Talia, D. Maccagni, A. Calabrò, Andrea Grazian, Ricardo Amorín, Laura Pentericci, Adriano Fontana, European Research Council, Ministerio de Economía y Competitividad (España), European Commission, Istituto Nazionale di Astrofisica, 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), Calabrò, A., Amorín, R., Fontana, A., Pérez-Montero, E., Lemaux, B.C., Ribeiro, B., Bardelli, S., Castellano, M., Contini, T., De Barros, S., Garilli, B., Grazian, A., Guaita, L., Hathi, N.P., Koekemoer, A.M., Le Fèvre, O., MacCagni, D., Pentericci, L., Schaerer, D., Talia, M., Tasca, L.A.M., Zucca, E., 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), Amorin Barbieri, Ricardo [0000-0001-5758-1000], and Apollo - University of Cambridge Repository

Subjects
Stellar mass, Metallicity, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Abundances [Galaxies], 01 natural sciences, Evolution [Galaxies], Galaxies: Abundances, Dwarf [Galaxies], 0103 physical sciences, Galaxies: Evolution, Astrophysics::Solar and Stellar Astrophysics, Emission spectrum, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Dwarf galaxy, Physics, 010308 nuclear & particles physics, Star formation, Galaxies: High-redshift, Astronomy and Astrophysics, Galaxies: Abundance, Astronomy and Astrophysic, Starburst [Galaxies], Galaxy, Redshift, Galaxies: Starburst, Space and Planetary Science, Galaxies: Dwarf, Low Mass, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], High-redshift [Galaxies]
Abstract

Context. The study of statistically significant samples of star-forming dwarf galaxies (SFDGs) at different cosmic epochs is essential for the detailed understanding of galaxy assembly and chemical evolution. However, the main properties of this large population of galaxies at intermediate redshift are still poorly known. Aims. We present the discovery and spectrophotometric characterization of a large sample of 164 faint (i ∼ 23-25 mag) SFDGs at redshift 0.13 ≤ z ≤ 0:88 selected by the presence of bright optical emission lines in the VIMOS Ultra Deep Survey (VUDS). We investigate their integrated physical properties and ionization conditions, which are used to discuss the low-mass end of the mass-metallicity relation (MZR) and other key scaling relations. Methods. We use optical VUDS spectra in the COSMOS, VVDS-02h, and ECDF-S fields, as well as deep multi-wavelength photometry that includes HST-ACS F814W imaging, to derive stellar masses, extinction-corrected star-formation rates (SFR), and gas-phase metallicities of SFDGs. For the latter, we use the direct method and a Te-consistent approach based on the comparison of a set of observed emission lines ratios with the predictions of detailed photoionization models. Results. The VUDS SFDGs are compact (median r ∼ 1.2 kpc), low-mass (M ∼ 10-10 M) galaxies with a wide range of starformation rates (SFR(Hα) ∼ 10-10 M/yr) and morphologies. Overall, they show a broad range of subsolar metallicities (12 + log(O/H) = 7:26-8:7; 0.04 ≲ Z=Z ≲ 1). Nearly half of the sample are extreme emission-line galaxies (EELGs) characterized by high equivalent widths and emission line ratios indicative of higher excitation and ionization conditions. The MZR of SFDGs shows a flatter slope compared to previous studies of galaxies in the same mass range and redshift. We find the scatter of the MZR is partly explained in the low mass range by varying specific SFRs and gas fractions amongst the galaxies in our sample. In agreement with recent studies, we find the subclass of EELGs to be systematically oset to lower metallicity compared to SFDGs at a given stellar mass and SFR, suggesting a younger starburst phase. Compared with simple chemical evolution models we find that most SFDGs do not follow the predictions of a "closed-box" model, but those from a gas-regulating model in which gas flows are considered. While strong stellar feedback may produce large-scale outflows favoring the cessation of vigorous star formation and promoting the removal of metals, younger and more metal-poor dwarfs may have recently accreted large amounts of fresh, very metal-poor gas, that is used to fuel current star formation. © 2017 ESO., Precious and continuous support for the VUDS survey was provided by the ESO staff, particularly by the Paranal staff conducting the observations and Marina Rejkuba and the ESO user support group in Garching. We also thank J. Sanchez Almeida who has provided insightful comments to the paper, and E. Daddi for helpful suggestions. This work is supported by funding from the European Research Council Advanced Grant ERC-2010-AdG-268107-EARLY and by INAF Grants PRIN 2010, PRIN 2012 and PICS 2013. R.A. and A.F. acknowledge the FP7 SPACE project "ASTRODEEP" (Ref. No. 312725), supported by the European Commission. R.A. acknowledges the support from the ERC Advanced Grant 695671 "QUENCH". A.C., O.C., M.T. and V.S. acknowledge the grant MIUR PRIN 2010-2011. E.P.M. acknowledges support from the Spanish MINECO through grant AYA2013-47742-C4-1-P. This work is based on data products made available at the CESAM data center, Laboratoire d'Astrophysique de Marseille. This work partly uses observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS.

Published
2017
Full Text
View/download PDF

31. The VIMOS Ultra Deep Survey: The role of HI kinematics and HI column density on the escape of Lya photons in star-forming galaxies at 2 < z < 4

Author

Anton M. Koekemoer, Ricardo Amorín, Ivana Orlitova, Marco Castellano, R. Thomas, Andrea Grazian, S. Bardelli, Daniel Schaerer, L. A. M. Tasca, E. Zucca, B. Ribeiro, Brian C. Lemaux, F. Marchi, Nimish P. Hathi, Anne Verhamme, Paolo Cassata, Margherita Talia, D. Maccagni, O. Le Fevre, Laura Pentericci, Le Brun, B. Garilli, Eros Vanzella, G. Zamorani, Lucia Guaita, Guaita, L., Talia, M., Pentericci, L., Verhamme, A., Cassata, P., Lemaux, B.C., Orlitova, I., Ribeiro, B., Schaerer, D., Zamorani, G., Garilli, B., Le Brun, V., Le Fèvre, O., MacCagni, D., Tasca, L.A.M., Thomas, R., Vanzella, E., Zucca, E., Amorin, R., Bardelli, S., Castellano, M., Grazian, A., Hathi, N.P., Koekemoer, A., Marchi, F., 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), Amorin Barbieri, Ricardo [0000-0001-5758-1000], and Apollo - University of Cambridge Repository

Subjects
Physics, ISM: kinematics and dynamics, Data products, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Galaxies: star formation, 010308 nuclear & particles physics, European research, Galaxies: high-redshift, Astronomy and Astrophysics, Astrophysics, Astronomy and Astrophysic, 01 natural sciences, Astrophysics - Astrophysics of Galaxies, Galaxy, Scattering, Space and Planetary Science, ISM: kinematics and dynamic, 0103 physical sciences, Techniques: imaging spectroscopy, 010303 astronomy & astrophysics
Abstract

We selected a sample of 76 Lya emitting galaxies from the VIMOS Ultra Deep Survey (VUDS) at 2300km/sec. An ISM with this value of NHI would favour a large amount of scattering events, especially when the medium is static, so it can explain large values of Ext(Lya-C) and small EW(Lya). On the contrary, an ISM with a lower NHI, but large velocity outflows would lead to a Lya spatial profile peaked at the galaxy center (i.e. low values of Ext(Lya-C)) and to a large EW(Lya), as we see in our data. Our results and their interpretation via radiative-transfer models tell us that it is possible to use Lya to study the properties of the HI gas., Comment: Accepted on May 2017

Published
2017
Full Text
View/download PDF

32. VIMOS Ultra-Deep Survey (VUDS): IGM transmission towards galaxies with $2.5 < z < 5.5$ and the colour selection of high-redshift galaxies

Author

Daniela Vergani, Yannick Mellier, C. Lopez-Sanjuan, Nick Scoville, Paolo Cassata, Rajat M. Thomas, Laurence Tresse, S. Paltani, B. Ribeiro, Ricardo Amorín, Letizia P. Cassarà, Andrea Cimatti, Brian C. Lemaux, Bianca Garilli, Andrea Grazian, Stéphane Charlot, Margherita Talia, Laura Pentericci, D. Maccagni, Adriano Fontana, Nimish P. Hathi, G. Zamorani, V. Le Brun, Lidia Tasca, O. Ilbert, Peter Capak, A. Durkalec, Thierry Contini, E. Zucca, S. Bardelli, Daniel Schaerer, Anton M. Koekemoer, Marco Castellano, James Dunlop, Mauro Giavalisco, V. Sommariva, Marco Scodeggio, P. W. Wang, Jean-Gabriel Cuby, Mara Salvato, Yoshiaki Taniguchi, Eros Vanzella, O. Cucciati, S. de la Torre, Sotiria Fotopoulou, Janine Pforr, O. Le Fevre, 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 d'étude spatiale des rayonnements (CESR), 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), Université Fédérale Toulouse Midi-Pyrénées-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), Institut de recherche en astrophysique et planétologie (IRAP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), 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), 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)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, 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), Thomas, R., Le Fèvre, O., Le Brun, V., Cassata, P., Garilli, B., Lemaux, B.C., Maccagni, D., Pentericci, L., Tasca, L.A.M., Zamorani, G., Zucca, E., Amorin, R., Bardelli, S., Cassarà, L., Castellano, M., Cimatti, A., Cucciati, O., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Paltani, S., Pforr, J., Ribeiro, B., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Tresse, L., Vanzella, E., Vergani, D., Capak, P., Charlot, S., Contini, T., Cuby, J.G., De La Torre, S., Dunlop, J., Fotopoulou, S., Koekemoer, A., López-Sanjuan, C., Mellier, Y., Salvato, M., Scoville, N., Taniguchi, Y., Wang, P.W., 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'Etudes Spatiales ( CNES ) -Centre National de la Recherche Scientifique ( CNRS ), Centre d'étude spatiale des rayonnements ( CESR ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire Midi-Pyrénées ( OMP ) -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 ), Institut de recherche en astrophysique et planétologie ( IRAP ), and Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
QSOS, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Extinction (astronomy), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Cosmology: observation, Spectral line, galaxies: high-redshift, 0103 physical sciences, Galaxy formation and evolution, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Galaxy: evolution, Line-of-sight, 010308 nuclear & particles physics, Astronomy and Astrophysics, Cosmic variance, Astronomy and Astrophysic, Redshift, Galaxy, Cosmology: observations, Galaxies: high-redshift, Galaxy: formation, Large-scale structure of Universe, Space and Planetary Science, cosmology: observations, large-scale structure of Universe, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

(arXiv abridged abstract) The observed UV rest-frame spectra of distant galaxies are the result of their intrinsic emission combined with absorption along the line of sight produced by the inter-galactic medium (IGM). Here we analyse the evolution of the mean IGM transmission Tr(Ly_alpha) and its dispersion along the line of sight for 2127 galaxies with 2.5= 4 compared to results from QSOs, but a degeneracy between dust extinction and IGM prevents to draw firm conclusions if the internal dust extinction for star-forming galaxies at z>4 takes a mean value significantly in excess of E(B-V)>0.15. Most importantly, we find a large dispersion of IGM transmission along the lines of sight towards distant galaxies with 68% of the distribution within 10 to 17% of the median value in delta z=0.5 bins, similar to what is found on the LOS towards QSOs. We demonstrate the importance of taking into account this large range of IGM transmission when selecting high redshift galaxies based on their colour properties (e.g. LBG or photometric redshift selection) or otherwise face a significant incompleteness in selecting high redshift galaxy populations., Comment: 15 pages, 11 figures, submitted to A&A

Published
2017
Full Text
View/download PDF

33. The Lyman continuum escape fraction of galaxies at z=3.3 in the VUDS-LBC/COSMOS field

Author

S. de la Torre, C. Lopez-Sanjuan, Nick Scoville, V. Le Brun, S. Paltani, Andrea Bonchi, Janine Pforr, S. Bardelli, R. Gerbasi, A. Durkalec, M. Giavalisco, Peter Capak, Alessandro Cimatti, Brian C. Lemaux, Ricardo Amorín, E. Zucca, L. A. M. Tasca, Nimish P. Hathi, D. Vergani, Anton M. Koekemoer, D. Maccagni, E. Giallongo, Andrea Grazian, Letizia P. Cassarà, Fabrizio Fiore, B. Ribeiro, B. Garilli, Yoshiaki Taniguchi, Eros Vanzella, Diego Paris, Sotiria Fotopoulou, James Dunlop, T. Contini, Stéphane Charlot, Laura Pentericci, V. Sommariva, Marco Scodeggio, Emiliano Merlin, G. Zamorani, P. Santini, Adriano Fontana, Lucia Guaita, Paolo Cassata, P. W. Wang, Marco Castellano, Olivier Ilbert, Daniel Schaerer, Yannick Mellier, L. Tresse, Rajat M. Thomas, K. Boutsia, Margherita Talia, O. Le Fevre, S. Pilo, O. Cucciati, INAF - Osservatorio Astronomico di Roma (OAR), Istituto Nazionale di Astrofisica (INAF), 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), AUTRES, Oncology Institute of Southern Switzerland, INAF - Osservatorio Astronomico di Bologna (OABO), Department of Astronomy [Amherst], University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS)-University of Massachusetts System (UMASS), ISDC Data Centre for Astrophysics, Université de Genève = University of Geneva (UNIGE), 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), INAF- Milano, INAF - Osservatorio Astrofisico di Arcetri (OAA), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, SUPA, Institute for Astronomy, University of Edinburgh, Aristotle University of Thessaloniki, Space Telescope Science Institute (STSci), 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 of cosmology and gravitation, University of Portsmouth, California Institute of Technology (CALTECH), 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), University of Geneva [Switzerland], 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), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Grazian, A., Giallongo, E., Gerbasi, R., Fiore, F., Fontana, A., Le Fèvre, O., Pentericci, L., Vanzella, E., Zamorani, G., Cassata, P., Garilli, B., Le Brun, V., Maccagni, D., Tasca, L.A.M., Thomas, R., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L.P., Castellano, M., Cimatti, A., Cucciati, O., Durkalec, A., Giavalisco, M., Hathi, N.P., Ilbert, O., Lemaux, B.C., Paltani, S., Ribeiro, B., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Tresse, L., Vergani, D., Bonchi, A., Boutsia, K., Capak, P., Charlot, S., Contini, T., De La Torre, S., Dunlop, J., Fotopoulou, S., Guaita, L., Koekemoer, A., López-Sanjuan, C., Mellier, Y., Merlin, E., Paris, D., Pforr, J., Pilo, S., Santini, P., Scoville, N., Taniguchi, Y., and Wang, P.W.

Subjects
Population, Continuum (design consultancy), Flux, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galaxies: distances and redshifts, Galaxies: evolution, Galaxies: high-redshift, Galaxies: photometry, Astronomy and Astrophysics, Space and Planetary Science, 0103 physical sciences, Galaxies: distances and redshift, 10. No inequality, education, 010303 astronomy & astrophysics, Reionization, Astrophysics::Galaxy Astrophysics, Physics, education.field_of_study, COSMIC cancer database, 010308 nuclear & particles physics, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Astrophysics of Galaxies (astro-ph.GA), Halo, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

The Lyman continuum (LyC) flux escaping from high-z galaxies into the IGM is a fundamental quantity to understand the physical processes involved in the reionization epoch. We have investigated a sample of star-forming galaxies at z~3.3 in order to search for possible detections of LyC photons escaping from galaxy halos. UV deep imaging in the COSMOS field obtained with the prime focus camera LBC at the LBT telescope was used together with a catalog of spectroscopic redshifts obtained by the VIMOS Ultra Deep Survey (VUDS) to build a sample of 45 galaxies at z~3.3 with L>0.5L*. We obtained deep LBC images of galaxies with spectroscopic redshifts in the interval 3.2728% but a detailed analysis of their properties reveals that, with the exception of two marginal detections (S/N~2) in the U band, all the other 8 galaxies are most likely contaminated by the UV flux of low-z interlopers located close to the high-z targets. The average escape fraction derived from the stacking of the cleaned sample was constrained to fesc_rel0.5L*) star-forming galaxies alone are unable to sustain the level of ionization observed in the cosmic IGM at z~3. Star-forming galaxies at higher redshift and at fainter luminosities (L<, Comment: 21 pages, 9 figures. Accepted for publication in A&A

Published
2016
Full Text
View/download PDF

34. The VIMOS Ultra Deep Survey: Lyα emission and stellar populations of star-forming galaxies at 2 < z < 2.5

Author

Marco Castellano, Yannick Mellier, Rajat M. Thomas, O. Le Fevre, Sylvain de la Torre, B. Ribeiro, A. Durkalec, M. Giavalisco, Sotiria Fotopoulou, Adriano Fontana, O. Cucciati, L. Tresse, Laura Pentericci, J. G. Cuby, Letizia P. Cassarà, Anton M. Koekemoer, Andrea Grazian, V. Le Brun, O. Ilbert, G. Zamorani, Daniela Vergani, E. Zucca, Brian Lemaux, Peter Capak, D. Maccagni, Ricardo Amorín, C. Lopez-Sanjuan, Nick Scoville, Lucia Guaita, Nimish P. Hathi, Daniel Schaerer, James Dunlop, E. Vanzella, T. Contini, S. Bardelli, Marco Scodeggio, P. W. Wang, Mara Salvato, Stéphane Charlot, Janine Pforr, S. Paltani, V. Sommariva, Margherita Talia, L. A. M. Tasca, Paolo Cassata, B. Garilli, Yoshiaki Taniguchi, Alessandro Cimatti, Hathi, N.P., Le Fèvre, O., Ilbert, O., Cassata, P., Tasca, L.A.M., Lemaux, B.C., Garilli, B., Le Brun, V., Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L.P., Castellano, M., Cimatti, A., Cucciati, O., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Guaita, L., Koekemoer, A., Paltani, S., Pforr, J., Ribeiro, B., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Tresse, L., Vergani, D., Capak, P., Charlot, S., Contini, T., Cuby, J.G., De La Torre, S., Dunlop, J., Fotopoulou, S., López-Sanjuan, C., Mellier, Y., Salvato, M., Scoville, N., Taniguchi, Y., and Wang, P.W.

Subjects
Physics, Stellar population, 010308 nuclear & particles physics, Extinction (astronomy), Galaxies: high-redshift, Galaxies: evolution, Astronomy and Astrophysics, Astrophysics, Astronomy and Astrophysic, Galaxies: formation, 01 natural sciences, Spectral line, Galaxy, Redshift, 13. Climate action, Space and Planetary Science, 0103 physical sciences, Galaxy formation and evolution, Spectral energy distribution, Alpha decay, 010303 astronomy & astrophysics
Abstract

The aim of this paper is to investigate spectral and photometric properties of 854 faint (IAB ≲ 25 mag) star-forming galaxies (SFGs) at 2 < z < 2.5 using the VIMOS Ultra-Deep Survey (VUDS) spectroscopic data and deep multi-wavelength photometric data in three extensively studied extragalactic fields (ECDFS, VVDS, COSMOS). These SFGs were targeted for spectroscopy as a result of their photometric redshifts. The VUDS spectra are used to measure the UV spectral slopes (β) as well as Lyα equivalent widths (EW). On average, the spectroscopically measured β (-1.36 ± 0.02), is comparable to the photometrically measured β (-1.32 ± 0.02), and has smaller measurement uncertainties. The positive correlation of β with the spectral energy distribution (SED)-based measurement of dust extinction Es(B-V) emphasizes the importance of β as an alternative dust indicator at high redshifts. To make a proper comparison, we divide these SFGs into three subgroups based on their rest-frame Lyα EW: SFGs with no Lyα emission (SFGN; EW ≤ 0 Å), SFGs with Lyα emission (SFGL; EW > 0 Å), and Lyα emitters (LAEs; EW ≥ 20 Å). The fraction of LAEs at these redshifts is ~10%, which is consistent with previous observations. We compared best-fitSED-estimated stellar parameters of the SFGN, SFGL and LAE samples. For the luminosities probed here (~ L∗), we find that galaxies with and without Lyα in emission have small but significant differences in their SED-based properties. We find that LAEs have less dust, and lower star-formation rates (SFR) compared to non-LAEs. We also find that LAEs are less massive compared to non-LAEs, though the difference is smaller and less significant compared to the SFR and Es(B-V). When we divide the LAEs according to their Spitzer/IRAC 3.6 μm fluxes, we find that the fraction of IRAC-detected (m3.6 ≲ 25 mag) LAEs is much higher than the fraction of IRAC-detected narrow band (NB)-selected LAEs at z ≃ 2-3. This could imply that UV-selected LAEs host a more evolved stellar population, which represents a later stage of galaxy evolution, compared to NB-selected LAEs. Based on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, under Large Program 185.A-0791.

Published
2016

35. The VIMOS ultra-deep survey: 10 000 galaxies with spectroscopic redshifts to study galaxy assembly at early epochs 2 < z ≃ 6

Author

Stéphane Charlot, O. Cucciati, S. de la Torre, G. Zamorani, Peter Capak, Yannick Mellier, Jean-Gabriel Cuby, E. Zucca, Laura Pentericci, V. Sommariva, A. Grazian, Marco Scodeggio, V. Le Brun, L. A. M. Tasca, Olivier Ilbert, Rajat M. Thomas, A. Durkalec, Ricardo Amorín, M. Castellano, P. W. Wang, Mara Salvato, D. Vergani, Letizia P. Cassarà, O. Le Fevre, Daniel Schaerer, Paolo Cassata, A. Cimatti, T. Contini, C. Moreau, E. Vanzella, Brian Lemaux, B. Garilli, S. Bardelli, Adriano Fontana, Yoshiaki Taniguchi, C. Lopez-Sanjuan, Nick Scoville, L. Tresse, M. Giavalisco, S. Fotopoulo, Nimish P. Hathi, Margherita Talia, D. Maccagni, Stéphane Paltani, B. Ribeiro, Le Fèvre, O., Tasca, L.A.M., Cassata, P., Garilli, B., Le Brun, V., Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Amorin, R., Bardelli, S., Capak, P., Cassarà, L., Castellano, M., Cimatti, A., Cuby, J.G., Cucciati, O., De La Torre, S., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Lemaux, B.C., Moreau, C., Paltani, S., Ribeiro, B., Salvato, M., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Taniguchi, Y., Tresse, L., Vergani, D., Wang, P.W., Charlot, S., Contini, T., Fotopoulou, S., López-Sanjuan, C., Mellier, Y., Scoville, 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), 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), 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), 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), and 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)

Subjects
Stellar mass, Large-scale structure of Universe, Population, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Surveys, Galaxies: formation, Lambda, Cosmology: observation, Spectral line, Astrophysics::Solar and Stellar Astrophysics, [INFO]Computer Science [cs], education, Survey, Astrophysics::Galaxy Astrophysics, Cosmology: observations, Galaxies: evolution, Galaxies: high-redshift, Astronomy and Astrophysics, Space and Planetary Science, Physics, education.field_of_study, Star formation, Astronomy and Astrophysic, Redshift survey, Redshift, Galaxy, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the VIMOS Ultra Deep Survey (VUDS), a spectroscopic redshift survey of ~10.000 very faint galaxies to study the major phase of galaxy assembly 2, Comment: 43 pages, 30 figures, submitted to A&A

Published
2015
Full Text
View/download PDF

36. Stellar mass to halo mass relation from galaxy clustering in VUDS: A high star formation efficiency at z ≠3 â†

Author

O. Cucciati, Yannick Mellier, S. de la Torre, A. Grazian, Paolo Cassata, Rajat M. Thomas, Marco Scodeggio, A. Cimatti, M. Giavalisco, Y. Taniguchi, D. Maccagni, Janine Pforr, E. Zucca, M. Castellano, Mara Salvato, V. Sommariva, C. Lopez-Sanjuan, Nick Scoville, G. Zamorani, A. Pollo, E. Vanzella, J. G. Cuby, James Dunlop, Daniel Schaerer, Ricardo Amorín, S. Bardelli, D. Vergani, Adriano Fontana, Peter Capak, T. Contini, L. A. M. Tasca, Sotiria Fotopoulou, Laura Pentericci, Anton M. Koekemoer, Margherita Talia, Stéphane Charlot, Brian Lemaux, B. Ribeiro, A. Durkalec, O. Le Fevre, Letizia P. Cassarà, P. W. Wang, Nimish P. Hathi, L. Tresse, V. Le Brun, O. Ilbert, S. Paltani, B. Garilli, Durkalec, A., Le Fèvre, O., De La Torre, S., Pollo, A., Cassata, P., Garilli, B., Le Brun, V., Lemaux, B.C., Maccagni, D., Pentericci, L., Tasca, L.A.M., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Amorín, R., Bardelli, S., Cassarà, L.P., Castellano, M., Cimatti, A., Cucciati, O., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Paltani, S., Ribeiro, B., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Tresse, L., Vergani, D., Capak, P., Charlot, S., Contini, T., Cuby, J.G., Dunlop, J., Fotopoulou, S., Koekemoer, A., López-Sanjuan, C., Mellier, Y., Pforr, J., Salvato, M., Scoville, N., Taniguchi, Y., and Wang, P.W.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Large-scale structure of Universe, statistical [methods], FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Halo occupation distribution, Early Universe, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Galaxies: evolution, Methods: statistical, Astronomy and Astrophysics, Space and Planetary Science, 010303 astronomy & astrophysics, evolution [galaxies], Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Star formation, early Universe, Mass ratio, Astronomy and Astrophysic, Galaxy, Dark matter halo, Stars, large-scale structure of Universe, Astrophysics::Earth and Planetary Astrophysics, Halo, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The relation between the galaxy stellar mass M_star and the dark matter halo mass M_h gives important information on the efficiency in forming stars and assembling stellar mass in galaxies. We present the stellar mass to halo mass ratio (SMHR) measurements at redshifts 2, Comment: 4 pages, 2 figures, submitted to A&A

Published
2015

37. Evolution of clustering length, large-scale bias, and host halo mass at 2 < z < 5 in the VIMOS Ultra Deep Survey (VUDS)

Author

A. Durkalec, O. Le Fèvre, A. Pollo, S. de la Torre, P. Cassata, B. Garilli, V. Le Brun, B. C. Lemaux, D. Maccagni, L. Pentericci, L. A. M. Tasca, R. Thomas, E. Vanzella, G. Zamorani, E. Zucca, R. Amorín, S. Bardelli, L. P. Cassarà, M. Castellano, A. Cimatti, O. Cucciati, A. Fontana, M. Giavalisco, A. Grazian, N. P. Hathi, O. Ilbert, S. Paltani, B. Ribeiro, D. Schaerer, M. Scodeggio, V. Sommariva, M. Talia, L. Tresse, D. Vergani, P. Capak, S. Charlot, T. Contini, J. G. Cuby, J. Dunlop, S. Fotopoulou, A. Koekemoer, C. López-Sanjuan, Y. Mellier, J. Pforr, M. Salvato, N. Scoville, Y. Taniguchi, P. W. Wang, 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 - Osservatorio Astronomico di Roma (OAR), Istituto Nazionale di Astrofisica (INAF), Oncology Institute of Southern Switzerland, INAF - Osservatorio Astronomico di Bologna (OABO), University of Bologna, Department of Astronomy [Amherst], University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS)-University of Massachusetts System (UMASS), ISDC Data Centre for Astrophysics, University of Geneva [Switzerland], INAF- Milano, INAF - Osservatorio Astrofisico di Arcetri (OAA), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, 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), SUPA, Institute for Astronomy, University of Edinburgh, Aristotle University of Thessaloniki, Space Telescope Science Institute (STSci), 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), Institute of cosmology and gravitation, University of Portsmouth, Max-Planck-Institut für Extraterrestrische Physik (MPE), California Institute of Technology (CALTECH), ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), Durkalec, A., Le Fevre, O., Pollo, A., De La Torre, S., Cassata, P., Garilli, B., Le Brun, V., Lemaux, B.C., Maccagni, D., Pentericci, L., Tasca, L.A.M., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Amorin, R., Bardelli, S., Cassara, L.P., Castellano, M., Cimatti, A., Cucciati, O., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Paltani, S., Ribeiro, B., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Tresse, L., Vergani, D., Capak, P., Charlot, S., Contini, T., Cuby, J.G., Dunlop, J., Fotopoulou, S., Koekemoer, A., Lopez-Sanjuan, C., Mellier, Y., Pforr, J., Salvato, M., Scoville, N., Taniguchi, Y., Wang, P.W., 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 Bologna/Università di Bologna, Université de Genève = University of Geneva (UNIGE), 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), 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
Large-scale structure of Universe, statistical [methods], Population, Dark matter, Cosmology: observations, Galaxies: evolution, Methods: statistical, Astronomy and Astrophysics, Space and Planetary Science, Astrophysics, Correlation function (astronomy), 01 natural sciences, Cosmology: observation, 0103 physical sciences, Cluster analysis, education, 010303 astronomy & astrophysics, evolution [galaxies], Physics, education.field_of_study, 010308 nuclear & particles physics, Astronomy and Astrophysic, observations [cosmology], Redshift, Galaxy, Amplitude, large-scale structure of Universe, Halo, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We investigate the evolution of galaxy clustering for galaxies in the redshift range 2.0, Comment: 19 pages, 10 figures, submitted to A&A

Published
2015
Full Text
View/download PDF

38. Discovery of a rich proto-cluster at z = 2.9 and associated diffuse cold gas in the VIMOS Ultra-Deep Survey (VUDS)

Author

Letizia P. Cassarà, Alessandro Cimatti, C. Moreau, Mara Salvato, V. Le Brun, Paolo Cassata, Margherita Talia, Nimish P. Hathi, O. Le Fèvre, Laurence Tresse, S. de la Torre, S. Bardelli, A. Durkalec, Sotiria Fotopoulou, C. López-Sanjuan, Adriano Fontana, P. W. Wang, Yoshiaki Taniguchi, Eros Vanzella, R. Thomas, Thierry Contini, M. Giavalisco, Peter Capak, Stephane Charlot, E. Zucca, Andrea Grazian, B. Ribeiro, G. Zamorani, Olga Cucciati, Yannick Mellier, D. Maccagni, Stéphane Paltani, Marco Castellano, M. Scodeggio, Olivier Ilbert, Ricardo Amorín, Laura Pentericci, N. Z. Scoville, Bianca Garilli, Daniela Vergani, Jean-Gabriel Cuby, Brian C. Lemaux, V. Sommariva, Lidia Tasca, Daniel Schaerer, 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), Cucciati, O., Zamorani, G., Lemaux, B.C., Bardelli, S., Cimatti, A., Le Fèvre, O., Cassata, P., Garilli, B., Le Brun, V., Maccagni, D., Pentericci, L., Tasca, L.A.M., Thomas, R., Vanzella, E., Zucca, E., Amorin, R., Capak, P., Cassarà, L.P., Castellano, M., Cuby, J.G., De La Torre, S., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Moreau, C., Paltani, S., Ribeiro, B., Salvato, M., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Taniguchi, Y., Tresse, L., Vergani, D., Wang, P.W., Charlot, S., Contini, T., Fotopoulou, S., López-Sanjuan, C., Mellier, Y., Scoville, N., 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
Physics, Line-of-sight, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Radio galaxy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Rest frame, Astronomy and Astrophysic, Cosmology: observations, Galaxies: high-redshift, Large-scale structure of Universe, Space and Planetary Science, Cosmology: observation, Redshift, Galaxy, galaxies: high-redshift, cosmology: observations, Galaxy formation and evolution, [INFO]Computer Science [cs], Halo, large-scale structure of Universe, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

[Abridged] We characterise a massive proto-cluster at z=2.895 that we found in the COSMOS field using the spectroscopic sample of the VIMOS Ultra-Deep Survey (VUDS). This is one of the rare structures at z~3 not identified around AGNs or radio galaxies, so it is an ideal laboratory to study galaxy formation in dense environments. The structure comprises 12 galaxies with secure spectroscopic redshift in an area of 7'x8', in a z bin of Dz=0.016. The measured galaxy number overdensity is delta_g=12+/-2. This overdensity has total mass of M~8.1x10^(14)M_sun in a volume of 13x15x17 Mpc^3. Simulations indicate that such an overdensity at z~2.9 is a proto-cluster that will collapse in a cluster of total mass M~2.5x10^(15)M_sun at z=0. We compare the properties of the galaxies within the overdensity with a control sample at the same z but outside the overdensity. We did not find any statistically significant difference between the properties (stellar mass, SFR, sSFR, NUV-r, r-K) of the galaxies inside and outside the overdensity. The stacked spectrum of galaxies in the overdensity background shows a significant absorption feature at the wavelength of Lya redshifted at z=2.895 (lambda=4736 A), with a rest frame EW = 4+/- 1.4 A. Stacking only background galaxies without intervening sources at z~2.9 along their line of sight, we find that this absorption feature has a rest frame EW of 10.8+/-3.7 A, with a detection S/N of ~4. These EW values imply a high column density (N(HI)~3-20x10^(19)cm^(-2)), consistent with a scenario where such absorption is due to intervening cold gas streams, falling into the halo potential wells of the proto-cluster galaxies. However, we cannot exclude the hypothesis that this absorption is due to the diffuse gas within the overdensity., Comment: 15 pages, 9 figures, accepted for publication in A&A (revised version after referee's comments and language editing)

Published
2014
Full Text
View/download PDF

39. Discovering extremely compact and metal-poor, star-forming dwarf galaxies out to z ~ 0.9 in the VIMOS Ultra-Deep Survey

Author

D. Maccagni, C. López-Sanjuan, Stéphane Paltani, Yoshiaki Taniguchi, Eros Vanzella, Daniela Vergani, Andrea Grazian, O. Le Fèvre, Thierry Contini, Ricardo Amorín, Margherita Talia, M. Giavalisco, Nimish P. Hathi, Peter Capak, G. Zamorani, S. Bardelli, V. Le Brun, Rajat M. Thomas, E. Zucca, Sotiria Fotopoulou, Letizia P. Cassarà, S. de la Torre, P. Cassata, M. Scodeggio, Brian C. Lemaux, N. Z. Scoville, Jean-Gabriel Cuby, Alessandro Cimatti, Bianca Garilli, Adriano Fontana, Laura Pentericci, Laurence Tresse, Mara Salvato, P. W. Wang, B. Ribeiro, Lidia Tasca, A. Durkalec, C. Moreau, V. Sommariva, Daniel Schaerer, Yannick Mellier, Olga Cucciati, Stephane Charlot, Marco Castellano, Olivier Ilbert, Amorín, R., Sommariva, V., Castellano, M., Grazian, A., Tasca, L.A.M., Fontana, A., Pentericci, L., Cassata, P., Garilli, B., Le Brun, V., Le Fèvre, O., Maccagni, D., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Bardelli, S., Capak, P., Cassará, L.P., Cimatti, A., Cuby, J.G., Cucciati, O., De La Torre, S., Durkalec, A., Giavalisco, M., Hathi, N.P., Ilbert, O., Lemaux, B.C., Moreau, C., Paltani, S., Ribeiro, B., Salvato, M., Schaerer, D., Scodeggio, M., Talia, M., Taniguchi, Y., Tresse, L., Vergani, D., Wang, P.W., Charlot, S., Contini, T., Fotopoulou, S., López-Sanjuan, C., Mellier, Y., Scoville, 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), 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), 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), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), European Project: 312725,EC:FP7:SPA,FP7-SPACE-2012-1,ASTRODEEP(2013), 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), and 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)

Subjects
Galaxies: fundamental parameters, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, Galaxies: abundances, Galaxies: fundamental parameter, FOS: Physical sciences, Astrophysics, Photometry (optics), Ionization, Galaxies: dwarf, Galaxies: evolution, Galaxies: high-redshift, Galaxies: starburst, Astronomy and Astrophysics, Space and Planetary Science, [INFO]Computer Science [cs], Emission spectrum, Dwarf galaxy, Physics, Star formation, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Astrophysics of Galaxies (astro-ph.GA), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Galaxies: abundance, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report the discovery of 31 low-luminosity (-14.5 > M_{AB}(B) > -18.8), extreme emission line galaxies (EELGs) at 0.2 < z < 0.9 identified by their unusually high rest-frame equivalent widths (100 < EW[OIII] < 1700 A) as part of the VIMOS Ultra Deep Survey (VUDS). VIMOS optical spectra of unprecedented sensitivity ($I_{AB}$ ~ 25 mag) along with multiwavelength photometry and HST imaging are used to investigate spectrophotometric properties of this unique sample and explore, for the first time, the very low stellar mass end (M* < 10^8 M$_{\odot}$) of the luminosity-metallicity (LZR) and mass-metallicity (MZR) relations at z < 1. Characterized by their extreme compactness (R50 < 1 kpc), low stellar mass and enhanced specific star formation rates (SFR/M* ~ 10^{-9} - 10^{-7} yr^{-1}), the VUDS EELGs are blue dwarf galaxies likely experiencing the first stages of a vigorous galaxy-wide starburst. Using T_e-sensitive direct and strong-line methods, we find that VUDS EELGs are low-metallicity (7.5 < 12+log(O/H) < 8.3) galaxies with high ionization conditions, including at least three EELGs showing HeII 4686A emission and four EELGs of extremely metal-poor (, Letter in A&A 568, L8 (2014). This replacement matches the published version

Published
2014
Full Text
View/download PDF

40. VIMOS Ultra-Deep Survey (VUDS): Witnessing the Assembly of a Massive Cluster at z~3.3

Author

R. Thomas, Andrea Grazian, Jean-Gabriel Cuby, Daniel Schaerer, S. de la Torre, E. Zucca, Laurence Tresse, Letizia P. Cassarà, Dale D. Kocevski, Marco Castellano, Olivier Ilbert, D. Maccagni, N. Z. Scoville, Ricardo Amorín, Andrea Cimatti, T. Sadibekova, Stéphane Paltani, V. Sommariva, Sotiria Fotopoulou, Lidia Tasca, Stephane Charlot, Thierry Contini, C. López-Sanjuan, A. Durkalec, Margherita Talia, Yannick Mellier, Bianca Garilli, G. Zamorani, S. Bardelli, Olga Cucciati, L. M. Lubin, Daniela Vergani, Adriano Fontana, M. Scodeggio, B. Ribeiro, M. Giavalisco, P. W. Wang, Laura Pentericci, Peter Capak, Nimish P. Hathi, Brian C. Lemaux, V. Le Brun, Paolo Cassata, Yoshiaki Taniguchi, Eros Vanzella, C. Moreau, O. Le Fèvre, Roy R. Gal, Mara Salvato, 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), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), 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)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), 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), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Lemaux, B.C., Cucciati, O., Tasca, L.A.M., Le Fèvre, O., Zamorani, G., Cassata, P., Garilli, B., Le Brun, V., Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zucca, E., Amorín, R., Bardelli, S., Capak, P., Cassarà, L.P., Castellano, M., Cimatti, A., Cuby, J.G., De La Torre, S., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Moreau, C., Paltani, S., Ribeiro, B., Salvato, M., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Taniguchi, Y., Tresse, L., Vergani, D., Wang, P.W., Charlot, S., Contini, T., Fotopoulou, S., Gal, R.R., Kocevski, D.D., López-Sanjuan, C., Lubin, L.M., Mellier, Y., Sadibekova, T., and Scoville, N.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, galaxies: active, FOS: Physical sciences, Astrophysics, Spectral line, techniques: photometric, galaxies: high-redshift, Coma Cluster, Galaxies: active, Galaxies: clusters: general, Galaxies: evolution, Galaxies: high-redshift, Techniques: photometric, Techniques: spectroscopic, Astronomy and Astrophysics, Space and Planetary Science, Photometric redshift, media_common, Physics, Star formation, Astronomy and Astrophysic, Redshift, Galaxy, Universe, galaxies: clusters: general, Halo, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], techniques: spectroscopic, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Using new spectroscopic observations obtained as part of the VIMOS Ultra-Deep Survey (VUDS), we perform a systematic search for overdense environments in the early universe ($z>2$) and report here on the discovery of Cl J0227-0421, a massive protocluster at $z=3.29$. This protocluster is characterized by both the large overdensity of spectroscopically confirmed members, $\delta_{gal}=10.5\pm2.8$, and a significant overdensity in photometric redshift members. The halo mass of this protocluster is estimated, by a variety of methods, to be roughly $3\times10^{14}$ $\mathcal{M}_{\odot}$ at $z\sim3.3$, which, evolved to $z=0$ results in a halo mass rivaling or exceeding that of the Coma cluster. The properties of 19 spectroscopically confirmed member galaxies are compared with a large sample of VUDS/VVDS galaxies in lower density field environments at similar redshifts. We find tentative evidence for an excess of redder, brighter, and more massive galaxies within the confines of the protocluster relative to the field population, which suggests that we may be observing the beginning of environmentally-induced quenching. The properties of these galaxies are investigated, including a discussion of the brightest protocluster galaxy which appears to be undergoing vigorous coeval nuclear and starburst activity. The remaining member galaxies appear to have characteristics which are largely similar to the field population. Though we find weaker evidence of the suppression of the median star formation rates amongst and differences in stacked spectra of member galaxies with respect to the field, we defer any conclusions of these trends to future work with the ensemble of protostructures that are found in the full VUDS sample., Comment: 23 pages, 15 figures, 3 tables, accepted for publication in A&A after minor changes, v3/v4 contains an additional online table and minor topical changes

Published
2014
Full Text
View/download PDF

41. Effect of the star formation histories on theSFR-M∗relation atz≥ 2

Author

S. Paltani, James Dunlop, Nimish P. Hathi, Daniel Schaerer, Thierry Contini, B. Ribeiro, V. Sommariva, Marco Scodeggio, Daniela Vergani, Laurence Tresse, C. Lopez-Sanjuan, Nick Scoville, Anton M. Koekemoer, M. Giavalisco, Peter Capak, V. Le Brun, O. Ilbert, Andrea Grazian, Marco Castellano, Janine Pforr, Alessandro Cimatti, Adriano Fontana, Mara Salvato, E. Zucca, Brian C. Lemaux, O. Cucciati, G. Zamorani, S. de la Torre, D. Maccagni, L. A. M. Tasca, P. W. Wang, Yannick Mellier, Lucia Guaita, Paolo Cassata, Rajat M. Thomas, Letizia P. Cassarà, S. Bardelli, A. Durkalec, Margherita Talia, B. Garilli, Eros Vanzella, Stéphane Charlot, Yoshi Taniguchi, Laura Pentericci, Ricardo Amorín, O. Le Fevre, Sotiria Fotopoulou, 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), 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), European Project: 268107,EC:FP7:ERC,ERC-2010-AdG_20100224,EARLY(2011), European Project: 606847,EC:FP7:SPA,FP7-SPACE-2013-1,DUSTPEDIA(2014), ITA, USA, GBR, FRA, DEU, ESP, CHL, JPN, GRC, CHE, Cassarà, L.P., Maccagni, D., Garilli, B., Scodeggio, M., Thomas, R., Le Fèvre, O., Zamorani, G., Schaerer, D., Lemaux, B.C., Cassata, P., Le Brun, V., Pentericci, L., Tasca, L.A.M., Vanzella, E., Zucca, E., Amorín, R., Bardelli, S., Castellano, M., Cimatti, A., Cucciati, O., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Paltani, S., Ribeiro, B., Sommariva, V., Talia, M., Tresse, L., Vergani, D., Capak, P., Charlot, S., Contini, T., De La Torre, S., Dunlop, J., Fotopoulou, S., Guaita, L., Koekemoer, A., López-Sanjuan, C., Mellier, Y., Pforr, J., Salvato, M., Scoville, N., Taniguchi, Y., Wang, P.W., 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), and 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)

Subjects
Stellar mass, Stellar population, Extinction (astronomy), Context (language use), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxies: formation, 01 natural sciences, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Galaxies: evolution, Galaxies: high-redshift, Galaxies: star formation, Astronomy and Astrophysics, Space and Planetary Science, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], 010308 nuclear & particles physics, Star formation, Astronomy and Astrophysic, Redshift, Galaxy, Spectral energy distribution, Astrophysics::Earth and Planetary Astrophysics
Abstract

We investigate the effect of different star formation histories (SFHs) on the relation between stellar mass (M∗) and star formation rate (SFR) using a sample of galaxies with reliable spectroscopic redshift zspec> 2 drawn from the VIMOS Ultra-Deep Survey (VUDS). We produce an extensive database of dusty model galaxies, calculated starting from a new library of single stellar population (SSPs) models, weighted by a set of 28 different star formation histories based on the Schmidt function, and characterized by different ratios of the gas infall timescale τinfall to the star formation efficiency ν. Dust extinction and re-emission were treated by means of the radiative transfer calculation. The spectral energy distribution (SED) fitting technique was performed by using GOSSIP+, a tool able to combine both photometric and spectroscopic information to extract the best value of the physical quantities of interest, and to consider the intergalactic medium (IGM) attenuation as a free parameter. We find that the main contribution to the scatter observed in the SFR-M∗ plane is the possibility of choosing between different families of SFHs in the SED fitting procedure, while the redshift range plays a minor role. The majority of the galaxies, at all cosmic times, are best fit by models with SFHs characterized by a high τinfall/ν ratio. We discuss the reliability of a low percentage of dusty and highly star-forming galaxies in the context of their detection in the far infrared (FIR).

Published
2016
Full Text
View/download PDF

42. The VIMOS Ultra-Deep Survey (VUDS): fast increase in the fraction of strong Lyman-αemitters fromz= 2 toz= 6

Author

P. Cassata, L. A. M. Tasca, O. Le Fèvre, B. C. Lemaux, B. Garilli, V. Le Brun, D. Maccagni, L. Pentericci, R. Thomas, E. Vanzella, G. Zamorani, E. Zucca, R. Amorin, S. Bardelli, P. Capak, L. P. Cassarà, M. Castellano, A. Cimatti, J. G. Cuby, O. Cucciati, S. de la Torre, A. Durkalec, A. Fontana, M. Giavalisco, A. Grazian, N. P. Hathi, O. Ilbert, C. Moreau, S. Paltani, B. Ribeiro, M. Salvato, D. Schaerer, M. Scodeggio, V. Sommariva, M. Talia, Y. Taniguchi, L. Tresse, D. Vergani, P. W. Wang, S. Charlot, T. Contini, S. Fotopoulou, A. M. Koekemoer, C. López-Sanjuan, Y. Mellier, N. Scoville, 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-IASF Milano, Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astronomico di Roma (OAR), INAF - Osservatorio Astronomico di Bologna (OABO), California Institute of Technology (CALTECH), University of Bologna/Università di Bologna, University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS), Université de Genève = University of Geneva (UNIGE), Max-Planck-Institut für Extraterrestrische Physik (MPE), Ehime University [Matsuyama, Japon], INAF–IASF Bologne, 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), 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), Space Telescope Science Institute (STSci), Cassata, P., Tasca, L.A.M., Le Fèvre, O., Lemaux, B.C., Garilli, B., Le Brun, V., Maccagni, D., Pentericci, L., Thomas, R., Vanzella, E., Zamorani, G., Zucca, E., Amorin, R., Bardelli, S., Capak, P., Cassarà, L.P., Castellano, M., Cimatti, A., Cuby, J.G., Cucciati, O., De La Torre, S., Durkalec, A., Fontana, A., Giavalisco, M., Grazian, A., Hathi, N.P., Ilbert, O., Moreau, C., Paltani, S., Ribeiro, B., Salvato, M., Schaerer, D., Scodeggio, M., Sommariva, V., Talia, M., Taniguchi, Y., Tresse, L., Vergani, D., Wang, P.W., Charlot, S., Contini, T., Fotopoulou, S., Koekemoer, A.M., López-Sanjuan, C., Mellier, Y., Scoville, N., University of Bologna, University of Geneva [Switzerland], Ehime University [Matsuyama], 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), and 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)

Subjects
Physics, Range (particle radiation), Cosmology and Nongalactic Astrophysics (astro-ph.CO), [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Galaxies: fundamental parameter, FOS: Physical sciences, galaxies: fundamental parameters, Astronomy and Astrophysics, Fraction (chemistry), Astrophysics, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Cosmology: observation, Galaxy, Cosmology: observations, Galaxies evolution, Galaxies: formation, Galaxies: fundamental parameters, Galaxies: high-redshift, Space and Planetary Science, galaxies: high-redshift, Astrophysics of Galaxies (astro-ph.GA), cosmology: observations, galaxies: formation, Narrow range, galaxies: evolution, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Aims. The aim of this work is to constrain the evolution of the fraction of Lya emitters among UV selected star forming galaxies at 2 25A to increase from 5% at z=2 to 30% at z=6, with the increase being relatively stronger beyond z=4. We observe no difference, for the narrow range of UV luminosities explored in this work, between the fraction of strong Lya emitters among galaxies fainter or brighter than M*, although the fraction for the FUV faint galaxies evolves faster, at 2, Comment: 12 pages, 6 figures, A&A in press

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results