Author: "Diego Capozzi" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Diego Capozzi"' showing total 37 results

Start Over Author "Diego Capozzi"

37 results on '"Diego Capozzi"'

1. Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

Author: A. Benoit-Lévy, Tenglin Li, Chihway Chang, Filipe B. Abdalla, A. L. King, R. C. Smith, Matthew R. Becker, Flavia Sobreira, Peter Doel, R. C. Wolf, M. D. Johnson, D. L. Burke, A. Roodman, Tommaso Giannantonio, D. Mudd, Edward Macaulay, C. Davis, Enrique Fernández, T. N. Varga, H. T. Diehl, Jochen Weller, F. J. Castander, A. A. Plazas, M. T. Busha, T. M. C. Abbott, E. J. Sanchez, Matt J. Jarvis, K. Honscheid, Martin Crocce, E. Suchyta, S. Allam, Robert A. Gruendl, August E. Evrard, S. A. Uddin, Diego Capozzi, Niall MacCrann, M. March, Basilio X. Santiago, Geraint F. Lewis, M. A. G. Maia, C. Bonnett, Alex Drlica-Wagner, P. Vielzeuf, Ofer Lahav, Tim Eifler, Daniela Carollo, Daniel Gruen, B. Flaugher, Donnacha Kirk, M. E. C. Swanson, M. Gatti, J. K. Hoormann, Erin Sheldon, David Brooks, A. Carnero Rosell, J. Gschwend, Gary Bernstein, Risa H. Wechsler, Michael Troxel, Huan Lin, W. C. Wester, David J. James, I. Sevilla-Noarbe, Felipe Menanteau, J. Annis, J. DeRose, D. W. Gerdes, Alistair R. Walker, A. K. Romer, J. Prat, Samuel Hinton, Douglas L. Tucker, N. Kuropatkin, Gregory Tarle, M. Childress, Kyler Kuehn, Paul Martini, J. Carretero, Ashley J. Ross, Tesla E. Jeltema, Eli S. Rykoff, A. G. Kim, Pablo Fosalba, Tamara M. Davis, G. Gutierrez, Marcelle Soares-Santos, Daniel A. Goldstein, Jacobo Asorey, J. De Vicente, Darren L. DePoy, L. N. da Costa, Daniel B. Thomas, Jennifer L. Marshall, Brad E. Tucker, R. P. Rollins, Elisabeth Krause, Anais Möller, E. Bertin, C. B. D'Andrea, Masao Sako, Rafe Schindler, Rob Sharp, S. E. Kuhlmann, Markus Michael Rau, W. G. Hartley, Bonnie Zhang, Karl Glazebrook, M. S. Schubnell, Keith Bechtol, Peter Melchior, Fang Yuan, Brian Nord, N. E. Sommer, Brian Yanny, Shantanu Desai, C. Lidman, Joshua A. Frieman, R. Cawthon, Juan Garcia-Bellido, Eduardo Rozo, Ramon Miquel, S. Samuroff, M. Carrasco Kind, Mathew Smith, Robert C. Nichol, C. Sánchez, Marcos Lima, E. Buckley-Geer, A. Alarcon, Ricardo L. C. Ogando, Juan Estrada, Enrique Gaztanaga, Ben Hoyle, Marvin Johnson, C. R. O'Neill, J. Zuntz, Vinu Vikram, V. Scarpine, 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), DES, Institut d'Astrophysique de Paris ( IAP ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Dark matter, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Photometry (optics), surveys, 0103 physical sciences, 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, catalogues, Weak gravitational lensing, QB, Physics, 010308 nuclear & particles physics, RCUK, Astronomy, Astronomy and Astrophysics, Redshift survey, methods: data analysis, Redshift, Galaxy, Gravitational lens, Space and Planetary Science, Dark energy, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We describe the derivation and validation of redshift distribution estimates and their uncertainties for the galaxies used as weak lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. The Bayesian Photometric Redshift (BPZ) code is used to assign galaxies to four redshift bins between z=0.2 and 1.3, and to produce initial estimates of the lensing-weighted redshift distributions $n^i_{PZ}(z)$ for bin i. Accurate determination of cosmological parameters depends critically on knowledge of $n^i$ but is insensitive to bin assignments or redshift errors for individual galaxies. The cosmological analyses allow for shifts $n^i(z)=n^i_{PZ}(z-\Delta z^i)$ to correct the mean redshift of $n^i(z)$ for biases in $n^i_{\rm PZ}$. The $\Delta z^i$ are constrained by comparison of independently estimated 30-band photometric redshifts of galaxies in the COSMOS field to BPZ estimates made from the DES griz fluxes, for a sample matched in fluxes, pre-seeing size, and lensing weight to the DES weak-lensing sources. In companion papers, the $\Delta z^i$ are further constrained by the angular clustering of the source galaxies around red galaxies with secure photometric redshifts at 0.15, Comment: MNRAS accepted; 20 pages, 8 figures
Published: 2018

2. UV-luminous, star-forming hosts of z ∼ 2 reddened quasars in the Dark Energy Survey

Author: David J. James, Pablo Fosalba, V. Scarpine, A. Benoit-Lévy, R. C. Smith, J. Gschwend, J. Carretero, M. Carrasco-Kind, Flavia Sobreira, G. Gutierrez, Shantanu Desai, S. L. Reed, Paul C. Hewett, Richard G. McMahon, David Brooks, Daniel Gruen, Brian Nord, M. Banerji, Joshua A. Frieman, Peter Doel, A. K. Romer, Juan Garcia-Bellido, Jennifer L. Marshall, E. J. Sanchez, Robert A. Gruendl, E. Buckley-Geer, Paul Martini, E. Suchyta, F. B. Abdalla, D. W. Gerdes, B. Flaugher, Alistair R. Walker, Ramon Miquel, Marcelle Soares-Santos, Carlos E. Cunha, Robert C. Nichol, Rafe Schindler, Kyler Kuehn, C. F. Wethers, Tesla E. Jeltema, Matthew Smith, Marcos Lima, I. Sevilla-Noarbe, N. Kuropatkin, L. N. da Costa, M. A. G. Maia, A. A. Plazas, K. Honscheid, C. Lemon, C. B. D'Andrea, Diego Capozzi, S. E. Kuhlmann, Michael Schubnell, Darren L. DePoy, A. Carnero Rosell, Yue Shen, Felipe Menanteau, Gregory Tarle, 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), DES, Banerji, Manda [0000-0002-0639-5141], Hewett, Paul [0000-0002-6528-1937], Lemon, Cameron [0000-0003-2456-9317], McMahon, Richard [0000-0001-8447-8869], and Apollo - University of Cambridge Repository
Subjects: Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Photometry (optics), galaxies: high-redshift, quasars: general, 0103 physical sciences, Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, QB, Physics, 010308 nuclear & particles physics, Star formation, RCUK, Astronomy and Astrophysics, Quasar, Astrophysics - Astrophysics of Galaxies, Galaxy, Wavelength, 13. Climate action, Space and Planetary Science, galaxies: star formation, Astrophysics of Galaxies (astro-ph.GA), ultraviolet: galaxies, Dark energy, Spectral energy distribution, Astrophysics::Earth and Planetary Astrophysics, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: We present the first rest-frame UV population study of 17 heavily reddened, high-luminosity (E(B-V)$_{\rm{QSO}}\gtrsim$ 0.5; L$_{\rm{bol}}>$ 10$^{46}$ergs$^{-1}$) broad-line quasars at $1.5 < z < 2.7$. We combine the first year of deep, optical, ground-based observations from the Dark Energy Survey (DES) with the near infrared VISTA Hemisphere Survey (VHS) and UKIDSS Large Area Survey (ULAS) data, from which the reddened quasars were initially identified. We demonstrate that the significant dust reddening towards the quasar in our sample allows host galaxy emission to be detected at the rest-frame UV wavelengths probed by the DES photometry. By exploiting this reddening effect, we disentangle the quasar emission from that of the host galaxy via spectral energy distribution (SED) fitting. We find evidence for a relatively unobscured, star-forming host galaxy in at least ten quasars, with a further three quasars exhibiting emission consistent with either star formation or scattered light. From the rest-frame UV emission, we derive instantaneous, dust-corrected star formation rates (SFRs) in the range 25 < SFR$_{\rm{UV}}$ < 365 M$_{\odot}$yr$^{-1}$, with an average SFR$_{\rm{UV}}$ = 130 $\pm$ 95 M$_{\odot}$yr$^{-1}$. We find a broad correlation between SFR$_{\rm{UV}}$ and the bolometric quasar luminosity. Overall, our results show evidence for coeval star formation and black hole accretion occurring in luminous, reddened quasars at the peak epoch of galaxy formation., 21 pages, 8 figures, MNRAS Accepted
Published: 2018

3. Extreme variability quasars from the Sloan Digital Sky Survey and the Dark Energy Survey

Author: Darren L. DePoy, Yue Shen, K. Honscheid, Carlos E. Cunha, Chris B. D'Andrea, J. Gschwend, Alistair R. Walker, Kevin Reil, A. Benoit-Lévy, Marcelle Soares-Santos, Felipe Menanteau, Marcio A. G. Maia, William Wester, J. Carretero, Nikolay Kuropatkin, Kyler Kuehn, David J. Brooks, Rafe Schindler, Shantanu Desai, Luiz N. da Costa, Eric Morganson, Aurelio Carnero Rosell, Richard G. McMahon, Mathew Smith, G. Gutierrez, Jennifer L. Marshall, Robert A. Gruendl, Juan Garcia-Bellido, Diego Capozzi, Manda Banerji, Michael Schubnell, V. Scarpine, David J. James, E. Buckley-Geer, Emmanuel Bertin, Marcos Lima, A. Roodman, Paul Martini, Molly E. C. Swanson, Erin S. Sheldon, Filipe B. Abdalla, Xin Liu, Andres Plazas Malagon, E. Suchyta, Peter Doel, E. J. Sanchez, Joshua A. Frieman, Steve Kuhlmann, Flavia Sobreira, Nick Rumbaugh, Daniel Gruen, M. Carrasco Kind, 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), DES, Institut d'Astrophysique de Paris ( IAP ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Population, black hole physics, galaxies: active, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Luminosity, surveys, quasars: general, 0103 physical sciences, Emission spectrum, education, 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, media_common, Physics, education.field_of_study, Accretion (meteorology), 010308 nuclear & particles physics, RCUK, Astronomy and Astrophysics, Quasar, line: profiles, Light curve, Astrophysics - Astrophysics of Galaxies, Redshift, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We perform a systematic search for long-term extreme variability quasars (EVQs) in the overlapping Sloan Digital Sky Survey (SDSS) and 3-Year Dark Energy Survey (DES) imaging, which provide light curves spanning more than 15 years. We identified ~1000 EVQs with a maximum g band magnitude change of more than 1 mag over this period, about 10% of all quasars searched. The EVQs have L_bol~10^45-10^47 erg/s and L/L_Edd~0.01-1. Accounting for selection effects, we estimate an intrinsic EVQ fraction of ~30-50% among all g, Comment: submitted to ApJ; comments welcome
Published: 2018

4. Stellar masses of SDSS-III/BOSS galaxies at z ∼ 0.5 and constraints to galaxy formation models

Author: Kaike Pan, Joel R. Brownstein, Daniel Thomas, David A. Wake, Bruno M. B. Henriques, Janine Pforr, Adam S. Bolton, Viktor Malanushenko, Stephanie A. Snedden, Daniel Oravetz, Claudia Maraston, Yanmei Chen, Benjamin A. Weaver, Diego Capozzi, Ramin A. Skibba, Donald G. York, Dmitry Bizyaev, Donald P. Schneider, Oliver Steele, Alaina Shelden, Karen L. Masters, Edd Edmondson, Howard Brewington, Alessandra Beifiori, Audrey Simmons, Jeremy L. Tinker, Robert C. Nichol, Tim D. Higgs, Kevin Bundy, and Elena Malanushenko
Subjects: Physics, Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, media_common.quotation_subject, Metallicity, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, Universe, Galaxy, Baryon, Boss, Space and Planetary Science, Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, media_common
Abstract: We calculate stellar masses for massive luminous galaxies at redshift 0.2-0.7 using the first two years of data from the Baryon Oscillation Spectroscopic Survey (BOSS). Stellar masses are obtained by fitting model spectral energy distributions to u,g,r,i,z magnitudes, and simulations with mock galaxies are used to understand how well the templates recover the stellar mass. Accurate BOSS spectroscopic redshifts are used to constrain the fits. We find that the distribution of stellar masses in BOSS is narrow (Delta log M~0.5 dex) and peaks at about logM ~ 11.3 (for a Kroupa initial stellar mass function), and that the mass sampling is uniform over the redshift range 0.2 to 0.6, in agreement with the intended BOSS target selection. The galaxy masses probed by BOSS extend over ~10^{12} M, providing unprecedented measurements of the high-mass end of the galaxy mass function. We find that the galaxy number density above ~ 2.5 10^{11} M agrees with previous determinations. We perform a comparison with semi-analytic galaxy formation models tailored to the BOSS target selection and volume, in order to contain incompleteness. The abundance of massive galaxies in the models compare fairly well with the BOSS data, but the models lack galaxies at the massive end. Moreover, no evolution with redshift is detected from ~0.6 to 0.4 in the data, whereas the abundance of massive galaxies in the models increases to redshift zero. Additionally, BOSS data display colour-magnitude (mass) relations similar to those found in the local Universe, where the most massive galaxies are the reddest. On the other hand, the model colours do not display a dependence on stellar mass, span a narrower range and are typically bluer than the observations. We argue that the lack of a colour-mass relation for massive galaxies in the models is mostly due to metallicity, which is too low in the models., Comment: 31 pages, 32 figures, accepted for publication to the Monthly Notices of the Royal Astronomical Society
Published: 2013

5. Detecting massive galaxies at high redshift using the Dark Energy Survey

Author: F. Ostrovski, Diego Capozzi, Michael T. Busha, Luke J. M. Davies, Daniel Thomas, Risa H. Wechsler, Robert C. Nichol, M. A. G. Maia, Casey Papovich, Claudia Maraston, L. N. da Costa, M. Banerji, and Basilio X. Santiago
Subjects: Physics, Luminous infrared galaxy, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Radio galaxy, Energia escura, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Quasar, Redshift, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, evolution [Galaxies], Formacao de galaxias, Peculiar galaxy, Space and Planetary Science, Galaxy group, high [Galaxies], Elliptical galaxy, Deslocamento para o vermelho, Dark galaxy, Astrophysics::Galaxy Astrophysics, Galaxy cluster, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Dark Energy Survey (DES) will be unprecedented in its ability to probe exceptionally large cosmic volumes to relatively faint optical limits. Primarily designed for the study of comparatively low redshift (z10^(12.0) M_sun) galaxies at z>~4. This will greatly improve our understanding of how galaxies form and evolve. By both passively evolving the low redshift mass function and extrapolating the observed high redshift mass function, we find that such galaxies should be rare but nonetheless present at early times, with predicted number densities of ~0.02 deg^-2. The unique combination of depth and coverage that DES provides will allow the identification of such galaxies should they exist - potentially identifying hundreds of such sources. We then model possible high redshift galaxies and determine their detectability using the DES filter sets and depths. We model sources with a broad range stellar properties and find that for these galaxies to be detected they must be either sufficiently young, high mass and/or relatively dust free (E(B-V), 20 pages, 12 figures, MNRAS accepted. Missed reference added, minor change to Fig. 2
Published: 2013

6. Mapping and Simulating Systematics due to Spatially Varying Observing Conditions in DES Science Verification Data

Author: Antonella Palmese, Carlos Solans Sanchez, J. L. Marshall, William Wester, Kyler Kuehn, Martin Crocce, Eli S. Rykoff, D. L. Burke, Boris Leistedt, Jon J Thaler, David J. James, Michael T. Busha, J. Carretero, Yanming Zhang, V. Vikram, Ofer Lahav, David Brooks, Matthew R. Becker, Flavia Sobreira, Robert A. Gruendl, B. Flaugher, C. B. D'Andrea, M. E. C. Swanson, Pablo Fosalba, Carlos Cunha, Stephen M. Kent, C. L. Chang, E. M. Huff, A. Carnero Rosell, A. Roodman, Brian Nord, Claudio Bruderer, V. Scarpine, Daniel Thomas, E. Buckley-Geer, Emmanuel Bertin, A. Benoit-Lévy, Marcos Lima, E. J. Sanchez, Joshua A. Frieman, Ashley J. Ross, Peter Melchior, Ramon Miquel, R. C. Smith, Enrique Gaztanaga, Eduardo Rozo, I. Sadeh, I. Sevilla-Noarbe, Will J. Percival, M. March, Basilio X. Santiago, C. Bonnett, Alistair R. Walker, G. Gutierrez, Shantanu Desai, R. A. Bernstein, Joe Zuntz, M. Banerji, Darren L. DePoy, Marcelle Soares-Santos, Gregory Tarle, F. B. Abdalla, F. Elsner, A. K. Romer, Sahar S. Allam, E. Suchyta, August E. Evrard, Risa H. Wechsler, Ricardo L. C. Ogando, Paul Martini, M. Jarvis, L. N. da Costa, M. A. G. Maia, Alexandre Refregier, K. Honscheid, Adam Amara, A. Fausti Neto, Christopher J. Miller, Tim Eifler, Kevin Reil, Tenglin Li, Sarah Bridle, M. Carrasco Kind, Robert C. Nichol, N. P. Kuropatkin, Daniel Gruen, Hiranya V. Peiris, A. A. Plazas, Diego Capozzi, D. W. Gerdes, Peter Doel, H. T. Diehl, A. H. Bauer, Gary Bernstein, and M. S. Schubnell
Subjects: Cosmology and Gravitation, statistics [galaxies], Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, FOS: Physical sciences, Large Synoptic Survey Telescope, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, Deslocamento para o vermelho, galaxy surveys, Cluster analysis, 010303 astronomy & astrophysics, STFC, Weak gravitational lensing, QB, media_common, Aglomerados de galaxias, Mapeamentos astronômicos, Physics, large-scale structure of universe, spatial systematics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, precision cosmology, RCUK, Astronomy and Astrophysics, Redshift, Galaxy, observations [cosmology], Fotometria astronômica, Null (SQL), Space and Planetary Science, Sky, astro-ph.CO, Dark energy, distances and redshifts [galaxies], image simulations, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Spatially-varying depth and characteristics of observing conditions, such as seeing, airmass, or sky background, are major sources of systematic uncertainties in modern galaxy survey analyses, in particular in deep multi-epoch surveys. We present a framework to extract and project these sources of systematics onto the sky, and apply it to the Dark Energy Survey (DES) to map the observing conditions of the Science Verification (SV) data. The resulting distributions and maps of sources of systematics are used in several analyses of DES SV to perform detailed null tests with the data, and also to incorporate systematics in survey simulations. We illustrate the complementarity of these two approaches by comparing the SV data with the BCC-UFig, a synthetic sky catalogue generated by forward-modelling of the DES SV images. We analyse the BCC-UFig simulation to construct galaxy samples mimicking those used in SV galaxy clustering studies. We show that the spatially-varying survey depth imprinted in the observed galaxy densities and the redshift distributions of the SV data are successfully reproduced by the simulation and well-captured by the maps of observing conditions. The combined use of the maps, the SV data and the BCC-UFig simulation allows us to quantify the impact of spatial systematics on $N(z)$, the redshift distributions inferred using photometric redshifts. We conclude that spatial systematics in the SV data are mainly due to seeing fluctuations and are under control in current clustering and weak lensing analyses. The framework presented here is relevant to all multi-epoch surveys, and will be essential for exploiting future surveys such as the Large Synoptic Survey Telescope (LSST), which will require detailed null-tests and realistic end-to-end image simulations to correctly interpret the deep, high-cadence observations of the sky., 13 pages, 12 figures
Published: 2016

7. redMaGiC: selecting luminous red galaxies from the DES Science Verification data

Author: Alistair R. Walker, Marcelle Soares-Santos, Flavia Sobreira, Peter Doel, Martin Crocce, Ricardo L. C. Ogando, H. T. Diehl, Enrique Gaztanaga, Vinu Vikram, Eli S. Rykoff, M. March, Basilio X. Santiago, M. Carrasco Kind, Robert C. Nichol, M. Jarvis, Ben Hoyle, J. J. Thaler, A. H. Bauer, T. M. C. Abbott, Hiranya V. Peiris, D. L. Burke, E. Bertin, C. Davis, E. J. Sanchez, C. Bonnett, Shantanu Desai, I. Sevilla-Noarbe, A. Benoit-Lévy, Syed Uddin, Daniela Carollo, A. A. Plazas, Gary Bernstein, Brian Nord, Marcio A. G. Maia, Diego Capozzi, Peter Melchior, Carlos E. Cunha, Robert A. Gruendl, David Brooks, M. E. C. Swanson, P. Fosalba, C. Lidman, Ofer Lahav, Alexandra Abate, Darren L. DePoy, A. Carnero Rosell, L. N. da Costa, Eduardo Rozo, David J. James, Kyler Kuehn, Ramon Miquel, Daniel Thomas, E. Buckley-Geer, Tim Eifler, Karl Glazebrook, W. C. Wester, Manda Banerji, Risa H. Wechsler, R. C. Smith, J. Carretero, K. Honscheid, Tamara M. Davis, A. K. Romer, Paul Martini, B. Flaugher, C. B. D'Andrea, A. Fausti Neto, J. P. Dietrich, Nikolay Kuropatkin, A. Roodman, M. J. Childress, Joshua A. Frieman, C. R. O'Neill, E. Suchyta, August E. Evrard, Joseph J. Mohr, Michael Schubnell, M. Sako, A. G. Kim, Marcos Lima, Boris Leistedt, Francisco J. Castander, Y. Zhang, F. B. Abdalla, Daniel Gruen, D. W. Gerdes, and C. J. Miller
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Gaussian, media_common.quotation_subject, astro-ph.GA, statistical [methods], Extrapolation, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, 01 natural sciences, photometric [techniques], symbols.namesake, 0103 physical sciences, 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), STFC, Astrophysics::Galaxy Astrophysics, Photometric redshift, media_common, QB, Physics, 010308 nuclear & particles physics, Sigma, Astronomy, RCUK, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), Outlier, symbols, astro-ph.CO, Astrophysics - Instrumentation and Methods for Astrophysics, Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics, general [galaxies], astro-ph.IM
Abstract: We introduce redMaGiC, an automated algorithm for selecting Luminous Red Galaxies (LRGs). The algorithm was specifically developed to minimize photometric redshift uncertainties in photometric large-scale structure studies. redMaGiC achieves this by self-training the color-cuts necessary to produce a luminosity-thresholded LRG sample of constant comoving density. We demonstrate that redMaGiC photozs are very nearly as accurate as the best machine-learning based methods, yet they require minimal spectroscopic training, do not suffer from extrapolation biases, and are very nearly Gaussian. We apply our algorithm to Dark Energy Survey (DES) Science Verification (SV) data to produce a redMaGiC catalog sampling the redshift range $z\in[0.2,0.8]$. Our fiducial sample has a comoving space density of $10^{-3}\ (h^{-1} Mpc)^{-3}$, and a median photoz bias ($z_{spec}-z_{photo}$) and scatter $(\sigma_z/(1+z))$ of 0.005 and 0.017 respectively. The corresponding $5\sigma$ outlier fraction is 1.4%. We also test our algorithm with Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8) and Stripe 82 data, and discuss how spectroscopic training can be used to control photoz biases at the 0.1% level., Comment: comments welcome
Published: 2016

8. The XMM Cluster Survey: the halo occupation number of BOSS galaxies in X-ray clusters

Author: L. Christodoulou, John P. Stott, Donald P. Schneider, Robert C. Nichol, Scott T. Kay, Christopher J. Miller, Julian A. Mayers, Karen L. Masters, Francisco Prada, H. Wilcox, Ashley J. Ross, John K. Parejko, P. Rooney, Martin Sahlén, Chris A. Collins, Idit Zehavi, Johan Comparat, Alina Streblyanska, A. Kathy Romer, Robert G. Mann, Nicola Mehrtens, Martin White, Matt Hilton, Ben Hoyle, Andrew R. Liddle, Pedro T. P. Viana, A. Bermeo-Hernandez, Diego Capozzi, and Martyn Bristow
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), STL000652/1, media_common.quotation_subject, galaxies: clusters. [X-rays], FOS: Physical sciences, Astrophysics, Astronomy & Astrophysics, 01 natural sciences, Halo occupation distribution, ST/K00090/1, 0103 physical sciences, Cluster (physics), ST/M000966/1, 010303 astronomy & astrophysics, STFC, ST/L005573/1, QC, Galaxy cluster, media_common, QB, Physics, 010308 nuclear & particles physics, RCUK, Astronomy, Astronomy and Astrophysics, Galaxy, ST/L000644/1, Baryon, haloes [galaxies], Boss, Space and Planetary Science, Sky, astro-ph.CO, galaxies: clusters [X-rays], Halo, Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present a direct measurement of the mean halo occupation distribution (HOD) of galaxies taken from the eleventh data release (DR11) of the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey (BOSS). The HOD of BOSS low-redshift (LOWZ: $0.2 < z < 0.4$) and Constant-Mass (CMASS: $0.43, Comment: Accepted for publication in MNRAS; 16 pages, 9 figures, 6 tables (1 electronic)
Published: 2016

9. The Dark Energy Survey: more than dark energy – an overview

Author: V. Scarpine, Peter Doel, Alex Drlica-Wagner, M. Carrasco-Kind, Eric H. Neilsen, H. T. Diehl, William G. Hartley, Martin Crocce, David Bacon, Jochen Weller, Huan Lin, Michael Schubnell, L. Clerkin, Daniel Thomas, E. Buckley-Geer, L. Whiteway, A. K. Romer, Paul Martini, J. Fabbri, Marcio A. G. Maia, Donnacha Kirk, Alistair R. Walker, Marcelle Soares-Santos, C. Bonnett, Brian Yanny, T. M. C. Abbott, Antonella Palmese, Erin Sheldon, David Brooks, M. E. C. Swanson, Hiranya V. Peiris, D. L. Burke, Shantanu Desai, E. J. Sanchez, Mathew Smith, Stephanie Jouvel, A. Benoit-Lévy, Vinu Vikram, Ryan J. Foley, I. Sadeh, A. L. King, Joe Zuntz, Jennifer L. Marshall, Ashley J. Ross, S. Allam, Marcella Carollo, Robert A. Gruendl, H. Wilcox, C. B. D'Andrea, J. Etherington, F. B. Abdalla, Bhuvnesh Jain, Xan Morice-Atkinson, Tesla E. Jeltema, F. Ostrovski, David J. James, Yanming Zhang, Christopher J. Miller, Ramon Miquel, A. Carnero-Rosell, C. Sánchez, John Peoples, B. Flaugher, Pablo Fosalba, E. Bertin, Ofer Lahav, Keith Bechtol, Maayane T. Soumagnac, Will J. Percival, Thomas E. Collett, Daniel Gruen, Nikolay Kuropatkin, A. Papadopoulos, W. C. Wester, Robert Connon Smith, Manda Banerji, Flavia Sobreira, Gary Bernstein, Jon J Thaler, Alex Merson, G. Gutierrez, P. Guarnieri, Brian Nord, G. B. Caminha, Basilio X. Santiago, Joseph J. Mohr, Eduardo Balbinot, S. L. Reed, Ricardo L. C. Ogando, Juan Estrada, Adam Amara, Risa H. Wechsler, E. Suchyta, August E. Evrard, Joaquin Vieira, Alexandre Refregier, Robert J. Brunner, Krishna Naidoo, Tianjun Li, Joshua A. Frieman, A. Roodman, Tommaso Giannantonio, I. Sevilla-Noarbe, Christopher J. Conselice, Claudia Maraston, A. A. Plazas, Diego Capozzi, L. N. da Costa, Robert C. Nichol, J. Carretero, D. W. Gerdes, Tamara M. Davis, Peter Melchior, Enrique Gaztanaga, Daniel A. Goldstein, Marc Manera, Francisco J. Castander, J. P. Dietrich, Richard G. McMahon, J. Carlsen, D. A. Finley, Mark Sullivan, Juan Garcia-Bellido, Eduardo Rozo, Jelena Aleksić, R. C. Thomas, Eli S. Rykoff, Richard G. Kron, K. Honscheid, Marcos Lima, Douglas L. Tucker, Kyler Kuehn, Jonathan Blazek, Sarah Bridle, Scott Dodelson, Carlos E. Cunha, Martin Makler, M. Sako, Richard Kessler, and G. Tarle
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), supernovae, astro-ph.GA, quasars, FOS: Physical sciences, Library science, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galaxies general, surveys, minor plantes, asteroids, galaxies, 0103 physical sciences, media_common.cataloged_instance, Deslocamento para o vermelho, European union, Astronomy observatory, Galáxias, 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, media_common, QB, Physics, Mapeamentos astronômicos, 010308 nuclear & particles physics, Surveys minor planets, European research, RCUK, Astronomy, Astronomy and Astrophysics, Asteroids general, Astrophysics - Astrophysics of Galaxies, Quasars general, Supernovae general, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Fundamental physics, astro-ph.CO, Christian ministry, Galaxy general, National laboratory, surveys – minor planets, asteroids: general – supernovae: general – Galaxy: general – galaxies: general – quasars: general, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: This overview article describes the legacy prospect and discovery potential of the Dark Energy Survey (DES) beyond cosmological studies, illustrating it with examples from the DES early data. DES is using a wide-field camera (DECam) on the 4m Blanco Telescope in Chile to image 5000 sq deg of the sky in five filters (grizY). By its completion the survey is expected to have generated a catalogue of 300 million galaxies with photometric redshifts and 100 million stars. In addition, a time-domain survey search over 27 sq deg is expected to yield a sample of thousands of Type Ia supernovae and other transients. The main goals of DES are to characterise dark energy and dark matter, and to test alternative models of gravity; these goals will be pursued by studying large scale structure, cluster counts, weak gravitational lensing and Type Ia supernovae. However, DES also provides a rich data set which allows us to study many other aspects of astrophysics. In this paper we focus on additional science with DES, emphasizing areas where the survey makes a difference with respect to other current surveys. The paper illustrates, using early data (from `Science Verification', and from the first, second and third seasons of observations), what DES can tell us about the solar system, the Milky Way, galaxy evolution, quasars, and other topics. In addition, we show that if the cosmological model is assumed to be Lambda+ Cold Dark Matter (LCDM) then important astrophysics can be deduced from the primary DES probes. Highlights from DES early data include the discovery of 34 Trans Neptunian Objects, 17 dwarf satellites of the Milky Way, one published z > 6 quasar (and more confirmed) and two published superluminous supernovae (and more confirmed)., 32 pages, 15 figures; a revised Figure 1 and minor changes, to match the published MNRAS version
Published: 2016

10. Cosmic shear measurements with Dark Energy Survey Science Verification data

Author: A. Roodman, A. K. Romer, Darren L. DePoy, A. Fausti Neto, M. Sako, Marcos Lima, Andrina Nicola, D. L. Burke, J. Carretero, T. Kacprzak, E. Suchyta, August E. Evrard, Andrey V. Kravtsov, Francisco J. Castander, G. Gutierrez, Alexandre Refregier, Matthew R. Becker, Flavia Sobreira, Cristiano G. Sabiu, S. Allam, Robert A. Gruendl, Joseph J. Mohr, J. P. Dietrich, A. A. Plazas, Gary Bernstein, Vinu Vikram, Diego Capozzi, A. Benoit-Lévy, M. T. Busha, David Brooks, M. E. C. Swanson, M. Carrasco Kind, Ofer Lahav, Eli S. Rykoff, David J. James, Michael Schubnell, Robert C. Nichol, William G. Hartley, Risa H. Wechsler, Matt J. Jarvis, Peter Doel, T. M. C. Abbott, Tim Eifler, Pablo Fosalba, V. Scarpine, Kevin Reil, Hiranya V. Peiris, Carles Sanchez, M. March, Enrique Gaztanaga, Oliver Friedrich, H. T. Diehl, Peter Melchior, E. J. Sanchez, R. C. Smith, David Bacon, Joe Zuntz, Daniel Gruen, Boris Leistedt, Robert Armstrong, A. H. Bauer, Niall MacCrann, B. Flaugher, C. B. D'Andrea, E. Sheldon, Brandon M. S. Erickson, E. Bertin, Ramon Miquel, Daniel Thomas, E. Buckley-Geer, Martin Crocce, Adam Amara, A. Carnero Rosell, C. Bonnett, Shantanu Desai, D. A. Finley, P. Martini, D. W. Gerdes, Bhuvnesh Jain, J. J. Thaler, Sarah Bridle, Scott Dodelson, Elisabeth Krause, Chihway Chang, Carlos E. Cunha, F. B. Abdalla, Donnacha Kirk, E. Fernandez, Alistair R. Walker, K. Honscheid, Marcelle Soares-Santos, C. J. Miller, Hee-Jong Seo, Ricardo L. C. Ogando, Brian Nord, Gregory Tarle, M. A. G. Maia, I. Sevilla-Noarbe, N. Kuropatkin, L. N. da Costa, M. Banerji, Joshua A. Frieman, Kyler Kuehn, Michael Troxel, and Tianjun Li
Subjects: IMPACT, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astronomy & Astrophysics, 01 natural sciences, Physics, Particles & Fields, 0103 physical sciences, Sample variance, Statistical physics, COVARIANCE, NOISE BIAS, 010303 astronomy & astrophysics, Weak gravitational lensing, QB, Physics, Science & Technology, COSMIC cancer database, 010308 nuclear & particles physics, Covariance matrix, WEAK LENSING SURVEYS, GALAXY SHAPE MEASUREMENT, STATISTICS, SIMULATIONS, Galaxy, POLARIZATION POWER SPECTRA, MODEL, Physical Sciences, astro-ph.CO, Dark energy, Halo, MATTER, Jackknife resampling
Abstract: We present measurements of weak gravitational lensing cosmic shear two-point statistics using Dark Energy Survey Science Verification data. We demonstrate that our results are robust to the choice of shear measurement pipeline, either ngmix or im3shape, and robust to the choice of two-point statistic, including both real and Fourier-space statistics. Our results pass a suite of null tests including tests for B-mode contamination and direct tests for any dependence of the two-point functions on a set of 16 observing conditions and galaxy properties, such as seeing, airmass, galaxy color, galaxy magnitude, etc. We furthermore use a large suite of simulations to compute the covariance matrix of the cosmic shear measurements and assign statistical significance to our null tests. We find that our covariance matrix is consistent with the halo model prediction, indicating that it has the appropriate level of halo sample variance. We compare the same jackknife procedure applied to the data and the simulations in order to search for additional sources of noise not captured by the simulations. We find no statistically significant extra sources of noise in the data. The overall detection significance with tomography for our highest source density catalog is 9.7 sigma . Cosmological constraints from the measurements in this work are presented in a companion paper [DES et al., Phys. Rev. D 94, 022001 (2016).].
Published: 2016

11. Assessment of systematic chromatic errors that impact sub-1% photometric precision in large-area sky surveys

Author: Daniel Scolnic, Brian Nord, A. Carnero Rosell, K. Honscheid, Christopher J. Miller, John Marriner, V. Vikram, Gregory Tarle, S. Boada, Richard Kessler, R. C. Smith, A. Benoit-Lévy, I. Sevilla-Noarbe, J. Frieman, J. Carretero, Daniel A. Goldstein, Huan Lin, J. L. Marshall, Peter Doel, David J. James, Flavia Sobreira, Ricardo L. C. Ogando, William Wester, Kyler Kuehn, Daniel Gruen, V. Scarpine, Pablo Fosalba, M. Carrasco Kind, H. T. Diehl, Daniel Thomas, Emmanuel Bertin, N. P. Kuropatkin, Robert C. Nichol, D. Q. Nagasawa, Douglas L. Tucker, Shantanu Desai, Alistair R. Walker, David Brooks, T. M. C. Abbott, Marcelle Soares-Santos, E. J. Sanchez, Ramon Miquel, E. Suchyta, Enrique Gaztanaga, Eric H. Neilsen, A. K. Romer, Tenglin Li, A. A. Plazas, A. Roodman, Sahar S. Allam, Martin Crocce, Diego Capozzi, Gary Bernstein, Joseph J. Mohr, D. A. Finley, L. N. da Costa, Darren L. DePoy, N. Mondrik, J. Annis, Peter Melchior, Stephen M. Kent, G. Gutierrez, Masao Sako, M. S. Schubnell, Robert A. Gruendl, B. Flaugher, C. B. D'Andrea, M. A. G. Maia, Carlos Cunha, Eli S. Rykoff, and D. L. Burke
Subjects: 010504 meteorology & atmospheric sciences, media_common.quotation_subject, observational [methods], FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Residual, 01 natural sciences, photometric [techniques], Photometry (optics), surveys, 0103 physical sciences, Calibration, Astrophysics::Solar and Stellar Astrophysics, Chromatic scale, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Remote sensing, media_common, QB, Color calibration, Physics, Astrophysics::Instrumentation and Methods for Astrophysics, RCUK, Astronomy and Astrophysics, Redshift, Stars, 13. Climate action, Space and Planetary Science, Sky, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, astro-ph.IM, atmospheric effects
Abstract: Meeting the science goals for many current and future ground-based optical large-area sky surveys requires that the calibrated broadband photometry is stable in time and uniform over the sky to 1% precision or better. Past surveys have achieved photometric precision of 1-2% by calibrating the survey's stellar photometry with repeated measurements of a large number of stars observed in multiple epochs. The calibration techniques employed by these surveys only consider the relative frame-by-frame photometric zeropoint offset and the focal plane position-dependent illumination corrections, which are independent of the source color. However, variations in the wavelength dependence of the atmospheric transmission and the instrumental throughput induce source color-dependent systematic errors. These systematic errors must also be considered to achieve the most precise photometric measurements. In this paper, we examine such systematic chromatic errors using photometry from the Dark Energy Survey (DES) as an example. We define a natural magnitude system for DES and calculate the systematic errors on stellar magnitudes, when the atmospheric transmission and instrumental throughput deviate from the natural system. We conclude that the systematic chromatic errors caused by the change of airmass in each exposure, the change of the precipitable water vapor and aerosol in the atmosphere over time, and the non-uniformity of instrumental throughput over the focal plane, can be up to 2% in some bandpasses. We compare the calculated systematic chromatic errors with the observed DES data. For the test sample data, we correct these errors using measurements of the atmospheric transmission and instrumental throughput. The residual after correction is less than 0.3%. We also find that the errors for non-stellar objects are redshift-dependent and can be larger than those for stars at certain redshifts., 16 pages, 9 figures, AJ accepted
Published: 2016

12. Galaxy Populations in Massive Galaxy Clusters to z=1.1: Color Distribution, Concentration, Halo Occupation Number and Red Sequence Fraction

Author: Alistair R. Walker, Marcelle Soares-Santos, J. Carretero, A. Fausti-Neto, A. Benoit-Lévy, Ofer Lahav, Peter Doel, Joseph J. Mohr, J. P. Dietrich, A. Saro, Shantanu Desai, R. L. C. Ogando, A. Carnero, G. Tarle, H. T. Diehl, Eduardo Rozo, C. Hennig, G. Gutierrez, Ramon Miquel, A. Zenteno, Nikhel Gupta, Jennifer L. Marshall, Brian Nord, R. C. Smith, I-Non Chiu, Sebastian Bocquet, V. Strazzullo, Eric H. Neilsen, K. Honscheid, B. Stalder, T. M. C. Abbott, Daniel Thomas, Daniel Gruen, M. Carrasco Kind, Michael McDonald, Yanxi Zhang, Tim Eifler, Vinu Vikram, David J. Brooks, S. A. Stanford, E. J. Sanchez, R. Capasso, Michael Schubnell, M. E. C. Swanson, David J. James, R. A. Bernstein, C. B. D'Andrea, Pablo Fosalba, Christian L. Reichardt, L. N. daCosta, Julie Hlavacek-Larrondo, Anthony H. Gonzalez, A. A. Plazas, E. Suchyta, August E. Evrard, E. Bertin, C. Gangkofner, F. B. Abdalla, Matthew B. Bayliss, Eli S. Rykoff, Diego Capozzi, A. K. Romer, Peter Melchior, Paul Martini, Flavia Sobreira, C. J. Miller, M. March, Basilio X. Santiago, Kyler Kuehn, I. Sevilla-Noarbe, N. Kuropatkin, Joshua A. Frieman, Robert A. Gruendl, 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), DES, Hennig, C., Mohr, J. J., Zenteno, A., Desai, S., Dietrich, J. P., Bocquet, S., Strazzullo, V., Saro, A., Abbott, T. M. C., Abdalla, F. B., Bayliss, M., Benoit-Levy, A., Bernstein, R. A., Bertin, E., Brooks, D., Capasso, R., Capozzi, D., Carnero, A., Carrasco Kind, M., Carretero, J., Chiu, I., D'Andrea, C. B., Dacosta, L. N., Diehl, H. T., Doel, P., Eifler, T. F., Evrard, A. E., Fausti-Neto, A., Fosalba, P., Frieman, J., Gangkofner, C., Gonzalez, A., Gruen, D., Gruendl, R. A., Gupta, N., Gutierrez, G., Honscheid, K., Hlavacek-Larrondo, J., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., March, M., Marshall, J. L., Martini, P., Mcdonald, M., Melchior, P., Miller, C. J., Miquel, R., Neilsen, E., Nord, B., Ogando, R., Plazas, A. A., Reichardt, C., Romer, A. K., Rozo, E., Rykoff, E. S., Sanchez, E., Santiago, B., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Stalder, B., Stanford, S. A., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Vikram, V., Walker, A. R., Zhang, Y., MIT Kavli Institute for Astrophysics and Space Research, Institut d'Astrophysique de Paris ( IAP ), 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: galaxies: clusters: individual, Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), formation [galaxies], [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Population, FOS: Physical sciences, Astrophysics, 01 natural sciences, Virial theorem, Astrophysics - Astrophysics of Galaxie, 0103 physical sciences, clusters: general [galaxies], galaxies: formation, education, 010303 astronomy & astrophysics, evolution [galaxies], STFC, Galaxy cluster, luminosity function [galaxies], QB, Luminosity function (astronomy), Physics, education.field_of_study, clusters: individual [galaxies], 010308 nuclear & particles physics, RCUK, Astronomy, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, galaxies: luminosity function, South Pole Telescope, Space and Planetary Science, mass function, galaxies: clusters: general, Astrophysics of Galaxies (astro-ph.GA), Baryon acoustic oscillations, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We study the galaxy populations in 74 Sunyaev Zeldovich Effect (SZE) selected clusters from the South Pole Telescope (SPT) survey that have been imaged in the science verification phase of the Dark Energy Survey (DES). The sample extends up to $z\sim 1.1$ with $4 \times 10^{14} M_{\odot}\le M_{200}\le 3\times 10^{15} M_{\odot}$. Using the band containing the 4000~\AA\ break and its redward neighbor, we study the color-magnitude distributions of cluster galaxies to $\sim m_*+2$, finding: (1) the intrinsic rest frame $g-r$ color width of the red sequence (RS) population is $\sim$0.03 out to $z\sim0.85$ with a preference for an increase to $\sim0.07$ at $z=1$ and (2) the prominence of the RS declines beyond $z\sim0.6$. The spatial distribution of cluster galaxies is well described by the NFW profile out to $4R_{200}$ with a concentration of $c_{\mathrm{g}} = 3.59^{+0.20}_{-0.18}$, $5.37^{+0.27}_{-0.24}$ and $1.38^{+0.21}_{-0.19}$ for the full, the RS and the blue non-RS populations, respectively, but with $\sim40$\% to 55\% cluster to cluster variation and no statistically significant redshift or mass trends. The number of galaxies within the virial region $N_{200}$ exhibits a mass trend indicating that the number of galaxies per unit total mass is lower in the most massive clusters, and shows no significant redshift trend. The red sequence (RS) fraction within $R_{200}$ is $(68\pm3)$\% at $z=0.46$, varies from $\sim$55\% at $z=1$ to $\sim$80\% at $z=0.1$, and exhibits intrinsic variation among clusters of $\sim14$\%. We discuss a model that suggests the observed redshift trend in RS fraction favors a transformation timescale for infalling field galaxies to become RS galaxies of 2 to 3~Gyr., Comment: 22 pages, 14 figures, submitted to MNRAS
Published: 2016

13. CMB lensing tomography with the DES Science Verification galaxies

Author: Flavia Sobreira, Ricardo L. C. Ogando, Peter Doel, Martin Crocce, H. T. Diehl, Jennifer L. Marshall, T. M. Crawford, Robert Crittenden, Robert Connon Smith, W. L. Holzapfel, A. H. Bauer, G. Simard, E. Fernandez, M. March, M. Carrasco Kind, I. Sevilla-Noarbe, E. Suchyta, August E. Evrard, L. N. da Costa, Robert C. Nichol, Peter Melchior, F. B. Abdalla, E. Bertin, K. T. Story, B. Soergel, C. L. Chang, Benjamin Saliwanchik, Gary Bernstein, A. Benoit-Lévy, J. Carretero, Brian Nord, M. Sako, Joshua A. Frieman, A. Roodman, Manda Banerji, Tommaso Giannantonio, Dragan Huterer, Vinu Vikram, G. Gutierrez, J. P. Dietrich, Enrique Gaztanaga, Bradford Benson, Robert Armstrong, B. Flaugher, Kyler Kuehn, D. L. Burke, Nikolay Kuropatkin, S. Allam, Robert A. Gruendl, D. A. Finley, Elisabeth Krause, A. K. Romer, Paul Martini, A. Fausti Neto, Tim Eifler, Jochen Weller, Marcos Lima, Ramon Miquel, Will J. Percival, T. M. C. Abbott, Antony A. Stark, Risa H. Wechsler, Joaquin Vieira, Gregory Tarle, Hiranya V. Peiris, Tianjun Li, Eli S. Rykoff, Ofer Lahav, E. J. Sanchez, A. Carnero Rosell, K. Honscheid, Scott Dodelson, Y. Omori, Carlos E. Cunha, Bhuvnesh Jain, R. A. Bernstein, Joe Zuntz, David J. James, Pablo Fosalba, Shantanu Desai, David Brooks, M. E. C. Swanson, Darren L. DePoy, Ashley J. Ross, John E. Carlstrom, J. J. Thaler, A. A. Plazas, Diego Capozzi, Joseph J. Mohr, C. B. D'Andrea, Donnacha Kirk, Alistair R. Walker, Michael Schubnell, Christian L. Reichardt, Marcelle Soares-Santos, R. Cawthon, Daniel Thomas, E. Buckley-Geer, F. Elsner, Gilbert Holder, Francisco J. Castander, Daniel Gruen, D. W. Gerdes, and Boris Leistedt
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), ANGULAR POWER SPECTRUM, Cosmic microwave background, Dark matter, STOCHASTIC BIAS, FOS: Physical sciences, cosmic background radiation, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, 01 natural sciences, INTEGRATED SACHS-WOLFE, gravitational lensing: weak, weak [gravitational lensing], Observational cosmology, LARGE-SCALE STRUCTURE, 0201 Astronomical and Space Sciences, 0103 physical sciences, 100 SQUARE DEGREES, 010303 astronomy & astrophysics, STFC, Weak gravitational lensing, Astrophysics::Galaxy Astrophysics, QB, Physics, Science & Technology, DARK ENERGY SURVEY, 010308 nuclear & particles physics, RCUK, Astronomy, Astronomy and Astrophysics, Redshift survey, ST/L000636/1, Redshift, CHALLENGE LIGHTCONE SIMULATION, South Pole Telescope, MICROWAVE BACKGROUND ANISOTROPIES, Space and Planetary Science, Physical Sciences, CROSS-CORRELATION, astro-ph.CO, Dark energy, large-scale structure of Universe, ATACAMA COSMOLOGY TELESCOPE, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We measure the cross-correlation between the galaxy density in the Dark Energy Survey (DES) Science Verification data and the lensing of the cosmic microwave background (CMB) as reconstructed with the Planck satellite and the South Pole Telescope (SPT). When using the DES main galaxy sample over the full redshift range $0.2 < z < 1.2$, a cross-correlation signal is detected at $6 \sigma$ and $4\sigma$ with SPT and Planck respectively. We then divide the DES galaxies into five photometric redshift bins, finding significant ($>$$2 \sigma$) detections in all bins. Comparing to the fiducial Planck cosmology, we find the redshift evolution of the signal matches expectations, although the amplitude is consistently lower than predicted across redshift bins. We test for possible systematics that could affect our result and find no evidence for significant contamination. Finally, we demonstrate how these measurements can be used to constrain the growth of structure across cosmic time. We find the data are fit by a model in which the amplitude of structure in the $z, Comment: 32 pages, 29 figures, minor modifications to match version published by MNRAS
Published: 2016

14. Galaxy clustering, photometric redshifts and diagnosis of systematics in the DES Science Verification data

Author: Tommaso Giannantonio, Gregory Tarle, Tim Eifler, J. J. Thaler, B. Flaugher, Kyler Kuehn, Ricardo L. C. Ogando, Ofer Lahav, Robert J. Brunner, Carlos E. Cunha, Robert Connon Smith, K. Honscheid, R. Cawthon, G. Gutierrez, Boris Leistedt, Eric H. Neilsen, Nikolay Kuropatkin, J. Carretero, David J. James, Martin Crocce, Jochen Weller, M. Carrasco Kind, Eli S. Rykoff, M. Sako, H. T. Diehl, Robert C. Nichol, Pablo Fosalba, Brian Nord, T. M. C. Abbott, Hiranya V. Peiris, Daniel Thomas, David Brooks, M. E. C. Swanson, A. A. Plazas, M. A. G. Maia, E. J. Sanchez, A. Carnero Rosell, A. H. Bauer, E. Fernandez, Francisco J. Castander, E. Buckley-Geer, Diego Capozzi, E. Suchyta, Risa H. Wechsler, D. L. Burke, Michael Schubnell, Marcos Lima, August E. Evrard, Joe Zuntz, Edward J. Kim, Jennifer L. Marshall, Ashley J. Ross, Alistair R. Walker, C. B. D'Andrea, Tianjun Li, A. Benoit-Lévy, S. Allam, Robert A. Gruendl, Marcelle Soares-Santos, C. Bonnett, Ramon Miquel, Carles Sanchez, Shantanu Desai, Enrique Gaztanaga, F. B. Abdalla, E. Bertin, Will J. Percival, A. K. Romer, Gary Bernstein, Paul Martini, Javier Sanchez, Daniel Gruen, William G. Hartley, A. Fausti Neto, Peter Melchior, D. A. Finley, Vinu Vikram, Rogerio Rosenfeld, D. W. Gerdes, C. J. Miller, Flavia Sobreira, M. March, Basilio X. Santiago, I. Sevilla-Noarbe, L. N. da Costa, M. Banerji, Joshua A. Frieman, IEEC CSIC, Univ Autonoma Barcelona, Ohio State Univ, Ctr Invest Energet Medioambientales & Tecnol CIEM, Univ Illinois, Univ Cambridge, Fermilab Natl Accelerator Lab, Lab Interinst & E Astron LIneA, UCL, Observ Nacl, Univ Chicago, ETH, Univ Portsmouth, Universidade Estadual Paulista (Unesp), Stanford Univ, SLAC Natl Accelerator Lab, Cerro Tololo Interamer Observ, Rhodes Univ, Univ Calif Berkeley, Univ Penn, CNRS, Univ Paris 06, Excellence Cluster Universe, Univ Munich, CALTECH, Univ Michigan, Max Planck Inst Extraterr Phys, Australian Astron Observ, Texas A&M Univ, Universidade de São Paulo (USP), Univ Sussex, Univ Fed Rio Grande do Sul, Argonne Natl Lab, and Univ Manchester
Subjects: systematic effects, Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cold dark matter, Dark matter, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Surveys, 01 natural sciences, symbols.namesake, 0103 physical sciences, surveys - cosmology, observations - large-scale structure of Universe, Planck, Galáxias, observations [Cosmology], Cluster analysis, 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, Photometric redshift, QB, Mapeamentos astronômicos, Physics, 010308 nuclear & particles physics, photometric surveys, RCUK, Astronomy, Astronomy and Astrophysics, galaxies clustering, Galaxy, Redshift, 13. Climate action, Space and Planetary Science, astro-ph.CO, Dark energy, symbols, large-scale structure of Universe, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We study the clustering of galaxies detected at $i, Comment: 23 pages, 18 figures, matches the version published in MNRAS. MNRAS 455, 4301-4324 (2015)
Published: 2016

15. Galaxies in X-ray selected clusters and groups in Dark Energy Survey Data. I. stellar mass growth of bright central galaxies since z~1.2

Author: E. Bertin, Flavia Sobreira, A. K. Romer, John P. Stott, Paul Martini, A. Fausti Neto, K. Honscheid, Gregory Tarle, Andrew R. Liddle, A. Carnero Rosell, F. J. Castander, Pedro T. P. Viana, Yanming Zhang, E. Suchyta, David Brooks, H. T. Diehl, Jennifer L. Marshall, T. M. C. Abbott, M. E. C. Swanson, David Bacon, Enrique Gaztanaga, August E. Evrard, Martin Makler, E. S. Rykoff, E. J. Sanchez, P. Doel, F. B. Abdalla, A. H. Bauer, M. Sako, Matt Hilton, D. L. Hollowood, Michael Schubnell, Timothy A. McKay, Shantanu Desai, J. Song, A. A. Plazas, J. J. Thaler, Robert C. Nichol, R. Das, Carlos E. Cunha, Ramon Miquel, A. Bermeo, Diego Capozzi, P. Fosalba, A. Roodman, Douglas L. Tucker, Kyler Kuehn, E. Buckley-Geer, Joseph J. Mohr, I. Sevilla, C. J. Miller, L. N. da Costa, Marcelle Soares-Santos, R. Perfecto, Daniel Gruen, David J. James, D. W. Gerdes, R. L. C. Ogando, C. Hennig, Ofer Lahav, B. Flaugher, Nikolay Kuropatkin, Martin Sahlén, Chris A. Collins, Vinu Vikram, V. Scarpine, M. Banerji, Joshua A. Frieman, P. Rooney, Tesla E. Jeltema, Enrique J. Fernández, Scott T. Kay, D. L. Burke, Robert A. Gruendl, C. Papovich, Robert G. Mann, Robert Connon Smith, Tim Eifler, H. Wilcox, N. Mehrtens, A. Benoit-Lévy, Ben Hoyle, and M. A. G. Maia
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, astro-ph.GA, Model prediction, FOS: Physical sciences, Astrophysics, 01 natural sciences, 0103 physical sciences, Cluster (physics), clusters: general [galaxies], 010303 astronomy & astrophysics, evolution [galaxies], STFC, QB, Physics, groups: general [galaxies], 010308 nuclear & particles physics, X-ray, RCUK, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), astro-ph.CO, Dark energy, Mass relation, ST/K00090X/1, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Using the science verification data of the Dark Energy Survey (DES) for a new sample of 106 X-Ray selected clusters and groups, we study the stellar mass growth of Bright Central Galaxies (BCGs) since redshift 1.2. Compared with the expectation in a semi-analytical model applied to the Millennium Simulation, the observed BCGs become under-massive/under-luminous with decreasing redshift. We incorporate the uncertainties associated with cluster mass, redshift, and BCG stellar mass measurements into analysis of a redshift-dependent BCG-cluster mass relation, $m_{*}\propto(\frac{M_{200}}{1.5\times 10^{14}M_{\odot}})^{0.24\pm 0.08}(1+z)^{-0.19\pm0.34}$, and compare the observed relation to the model prediction. We estimate the average growth rate since $z = 1.0$ for BCGs hosted by clusters of $M_{200, z}=10^{13.8}M_{\odot}$, at $z=1.0$: $m_{*, BCG}$ appears to have grown by $0.13\pm0.11$ dex, in tension at $\sim 2.5 \sigma$ significance level with the $0.40$ dex growth rate expected from the semi-analytic model. We show that the buildup of extended intra-cluster light after $z=1.0$ may alleviate this tension in BCG growth rates., Comment: Accepted to ApJ
Published: 2016

16. Revisiting the role of the thermally pulsating asymptotic-giant-branch phase in high-redshift galaxies

Author: Alvio Renzini, V. Strazzullo, Claudia Maraston, Diego Capozzi, Raphael Gobat, Emanuele Daddi, Capozzi, D, Maraston, C, Daddi, E, Renzini, A, Strazzullo, V, and Gobat, R
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar population, formation [galaxies], astro-ph.GA, Astrophysics::High Energy Astrophysical Phenomena, Surface brightness fluctuation, FOS: Physical sciences, stars: AGB and post-AGB, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, galaxies: high-redshift, 0103 physical sciences, Galaxy formation and evolution, galaxies: formation, Asymptotic giant branch, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, 010303 astronomy & astrophysics, STFC, evolution [galaxies], Astrophysics::Galaxy Astrophysics, Physics, Luminous infrared galaxy, galaxies: evolution, Star formation, RCUK, Astronomy, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, AGB and post-AGB [stars], Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), astro-ph.CO, Elliptical galaxy, high-redshift [galaxies], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We study the debated contribution from thermally pulsing asymptotic giant branch (TP-AGB) stars in evolutionary population synthesis models. We investigate the Spectral Energy Distributions (SEDs) of a sample of 51 spectroscopically confirmed, high-z ($1.3, Comment: 48 pages, 17 figures, 10 Tables. Accepted for publication in MNRAS
Published: 2016

17. The DES Science Verification weak lensing shear catalogues

Author: Daniel Thomas, E. Buckley-Geer, T. Kacprzak, Michael Schubnell, Brian Nord, Eli S. Rykoff, I. Sevilla-Noarbe, Tim Eifler, B. Flaugher, Ricardo L. C. Ogando, M. Jarvis, C. B. D'Andrea, E. Sheldon, G. Gutierrez, Peter Melchior, Nikolay Kuropatkin, Darren L. DePoy, L. N. da Costa, S. Samuroff, A. Carnero Rosell, Peter Doel, David Brooks, M. E. C. Swanson, Joseph Clampitt, Marcos Lima, Barnaby Rowe, A. K. Romer, Alex Drlica-Wagner, Donnacha Kirk, David J. James, Joseph J. Mohr, Alistair R. Walker, K. Honscheid, Matthew R. Becker, Flavia Sobreira, H. T. Diehl, Michael Troxel, J. J. Thaler, A. Fausti Neto, Francisco J. Castander, E. M. Huff, Marcelle Soares-Santos, Joshua A. Frieman, Michael Hirsch, Pablo Fosalba, M. Carrasco Kind, J. Carretero, Kyler Kuehn, D. L. Burke, M. March, R. C. Smith, Niall MacCrann, J. P. Dietrich, Gregory Tarle, Robert Armstrong, M. Sako, Adam Amara, Kevin Reil, S. Allam, Robert A. Gruendl, E. Suchyta, J. Annis, C. Bonnett, Carles Sanchez, Alexandre Refregier, Enrique Gaztanaga, Shantanu Desai, Daniel Gruen, D. W. Gerdes, C. Gangkofner, Steve Kent, F. B. Abdalla, E. Bertin, A. A. Plazas, Diego Capozzi, Gary Bernstein, Bhuvnesh Jain, Vinu Vikram, V. Scarpine, Ofer Lahav, Eric H. Neilsen, Martin Crocce, P. Martini, Joe Zuntz, A. Benoit-Lévy, Risa H. Wechsler, Tianjun Li, A. Roodman, R. Das, Ramon Miquel, T. M. C. Abbott, E. J. Sanchez, Sarah Bridle, Chihway Chang, and Carlos E. Cunha
Subjects: Point spread function, Systematic error, Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Surveys, 01 natural sciences, 0103 physical sciences, image processing [Techniques], observations [Cosmology], data analysis [Methods], Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, STFC, Weak gravitational lensing, QB, Physics, 010308 nuclear & particles physics, RCUK, Astronomy and Astrophysics, Geodesy, Catalogues, Galaxy, Shear (geology), Space and Planetary Science, astro-ph.CO, Dark energy, Astrophysics - Instrumentation and Methods for Astrophysics, weak [Gravitational lensing], astro-ph.IM, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present weak lensing shear catalogues for 139 square degrees of data taken during the Science Verification (SV) time for the new Dark Energy Camera (DECam) being used for the Dark Energy Survey (DES). We describe our object selection, point spread function estimation and shear measurement procedures using two independent shear pipelines, IM3SHAPE and NGMIX, which produce catalogues of 2.12 million and 3.44 million galaxies respectively. We detail a set of null tests for the shear measurements and find that they pass the requirements for systematic errors at the level necessary for weak lensing science applications using the SV data. We also discuss some of the planned algorithmic improvements that will be necessary to produce sufficiently accurate shear catalogues for the full 5-year DES, which is expected to cover 5000 square degrees., Accepted by MNRAS; 38 pages, 29 figures; v3: minor edits based on referee's comments, switched to mnras style, added figure 8, updated info about released catalogs
Published: 2016

18. THE REDMAPPER GALAXY CLUSTER CATALOG from des SCIENCE VERIFICATION DATA

Author: N. Kuropatkin, Daniel Gruen, M. Carrasco Kind, Brian Nord, Geraint F. Lewis, Flavia Sobreira, Robert C. Nichol, Eduardo Rozo, Michael Schubnell, Ramon Miquel, John P. Stott, G. Gutierrez, E. Bertin, Basilio X. Santiago, E. Suchyta, Risa H. Wechsler, M. Childress, A. K. Romer, D. A. Finley, Robert G. Mann, Syed Uddin, Ricardo L. C. Ogando, August E. Evrard, Shantanu Desai, A. Benoit-Lévy, Ben Hoyle, Gary Bernstein, David Brooks, M. E. C. Swanson, Paul Martini, Matt Hilton, C. Vergara Cervantes, Marcos Lima, Douglas L. Tucker, Jennifer L. Marshall, Tamara M. Davis, Daniel A. Goldstein, A. Saro, Kyler Kuehn, J. P. Dietrich, I. Sevilla-Noarbe, F. B. Abdalla, J. Annis, Joseph J. Mohr, Gregory Tarle, Eli S. Rykoff, Peter Melchior, Ofer Lahav, Francisco J. Castander, Peter Doel, A. A. Plazas, H. T. Diehl, Yanming Zhang, A. Carnero Rosell, Julian A. Mayers, C. Lidman, A. Bermeo-Hernandez, David J. James, Carlos E. Cunha, Diego Capozzi, Alistair R. Walker, Pablo Fosalba, Marcelle Soares-Santos, K. Honscheid, Karl Glazebrook, V. Vikram, L. N. da Costa, H. Wilcox, Christopher J. Miller, Kevin Reil, Tesla E. Jeltema, Pedro T. P. Viana, R. C. Smith, T. M. C. Abbott, Daniel Thomas, V. Scarpine, Joshua A. Frieman, E. J. Sanchez, Devon L. Hollowood, P. Rooney, Martin Sahlén, Chris A. Collins, Scott T. Kay, D. L. Burke, S. Allam, Robert A. Gruendl, B. Flaugher, C. B. D'Andrea, M. A. G. Maia, Rykoff, E. S., Rozo, E., Hollowood, D., Bermeo-Hernandez, A., Jeltema, T., Mayers, J., Romer, A. K., Rooney, P., Saro, A., Cervantes, C. Vergara, Wechsler, R. H., Wilcox, H., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Benoit-Lévy, A., Bernstein, G. M., Bertin, E., Brooks, D., Burke, D. L., Capozzi, D., Rosell, A. Carnero, Kind, M. Carrasco, Castander, F. J., Childress, M., Collins, C. A., Cunha, C. E., D'Andrea, C. B., Costa, L. N. Da, Davis, T. M., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Finley, D. A., Flaugher, B., Fosalba, P., Frieman, J., Glazebrook, K., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gutierrez, G., Hilton, M., Honscheid, K., Hoyle, B., James, D. J., Kay, S. T., Kuehn, K., Kuropatkin, N., Lahav, O., Lewis, G. F., Lidman, C., Lima, M., Maia, M. A. G., Mann, R. G., Marshall, J. L., Martini, P., Melchior, P., Miller, C. J., Miquel, R., Mohr, J. J., Nichol, R. C., Nord, B., Ogando, R., Plazas, A. A., Reil, K., Sahlén, M., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Stott, J. P., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D., Uddin, S., Viana, P. T. P., Vikram, V., Walker, A. R., and Zhang, Y.
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Star (game theory), media_common.quotation_subject, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Lambda, 01 natural sciences, Clusters, 0103 physical sciences, clusters: general [galaxies], Astrophysics::Solar and Stellar Astrophysics, Deslocamento para o vermelho, galaxies: clusters: general, Astronomy and Astrophysics, Space and Planetary Science, General, 010303 astronomy & astrophysics, STFC, Galaxy cluster, Astrophysics::Galaxy Astrophysics, Photometric redshift, media_common, QB, Aglomerados de galaxias, Physics, 010308 nuclear & particles physics, Energia escura, Astrophysics::Instrumentation and Methods for Astrophysics, RCUK, Astronomy and Astrophysic, Galaxies, Galaxy, Redshift, Fotometria astronômica, South Pole Telescope, Sky, astro-ph.CO, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We describe updates to the \redmapper{} algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to $150\,\mathrm{deg}^2$ of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited, and contains 786 clusters with richness $\lambda>20$ (roughly equivalent to $M_{\rm{500c}}\gtrsim10^{14}\,h_{70}^{-1}\,M_{\odot}$) and $0.2, Comment: 21 pages, accepted to ApJS (The Astrophysical Journal Supplement Series, Volume 224, Issue 1, article id. 1, pp. (2016))
Published: 2016

19. Galaxy formation and evolution with the Dark Energy Survey

Author: Diego Capozzi, Claudia Maraston, Daniel Thomas, and Luke J. M. Davies
Subjects: Physics, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy merger, Disc galaxy, Galaxy, Space and Planetary Science, Galaxy formation and evolution, Dark galaxy, Interacting galaxy, Astrophysics::Galaxy Astrophysics, Galaxy rotation curve, Dwarf galaxy
Abstract: The Dark Energy Survey (DES) will be the new state-of the-art in large-scale galaxy imaging surveys. With 5,000 deg2, it will cover an area of the sky similar to SDSS-II, but will go over two magnitudes deeper, reaching 24th magnitude in all four optical bands (griz). DES will further provide observations in the redder Y-band and will be complemented with VISTA observations in the near-infrared bands JHK. Hence DES will furnish an unprecedented combination of sky and wavelength coverage and depth, unreached by any of the existing galaxy surveys. The very nature of the DES data set – large volume at intermediate photometric depth – allows us to probe galaxy formation and evolution within a cosmic-time range of ~ 10 Gyr and in different environments. In fact there will be many galaxy clusters available for galaxy evolution studies, given that one of the main aims of DES is to use their abundance to constrain the equation of state of dark energy. The X-ray follow up of these clusters, coupled with the use of gravitational lensing, will provide very precise measures of their masses, enabling us to study in detail the influence of the environment on galaxy formation and evolution processes. DES will leverage the study of these processes by allowing us to perform a detailed investigation of the galaxy luminosity and stellar mass functions and of the relationship between dark and baryonic matter as described by the Halo Occupation Distribution.
Published: 2012

20. THEXMMCLUSTER SURVEY: THE BUILD-UP OF STELLAR MASS IN BRIGHTEST CLUSTER GALAXIES AT HIGH REDSHIFT

Author: E. J. Lloyd-Davies, Christopher J. Miller, Scott T. Kay, Mark Hosmer, Matt Hilton, A. K. Romer, Michael Davidson, Pedro T. P. Viana, Diego Capozzi, Andrew R. Liddle, Robert C. Nichol, John P. Stott, Ben Hoyle, S. A. Stanford, Nicola Mehrtens, Martin Sahlén, and Chris A. Collins
Subjects: Physics, Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar population, Stellar mass, 010308 nuclear & particles physics, Star formation, Metallicity, Dark matter, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Redshift, Space and Planetary Science, 0103 physical sciences, Astrophysics::Earth and Planetary Astrophysics, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, Galaxy cluster, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present deep J and Ks band photometry of 20 high redshift galaxy clusters between z=0.8-1.5, 19 of which are observed with the MOIRCS instrument on the Subaru Telescope. By using near-infrared light as a proxy for stellar mass we find the surprising result that the average stellar mass of Brightest Cluster Galaxies (BCGs) has remained constant at ~9e11MSol since z~1.5. We investigate the effect on this result of differing star formation histories generated by three well known and independent stellar population codes and find it to be robust for reasonable, physically motivated choices of age and metallicity. By performing Monte Carlo simulations we find that the result is unaffected by any correlation between BCG mass and cluster mass in either the observed or model clusters. The large stellar masses imply that the assemblage of these galaxies took place at the same time as the initial burst of star formation. This result leads us to conclude that dry merging has had little effect on the average stellar mass of BCGs over the last 9-10 Gyr in stark contrast to the predictions of semi-analytic models, based on the hierarchical merging of dark matter haloes, which predict a more protracted mass build up over a Hubble time. We discuss however that there is potential for reconciliation between observation and theory if there is a significant growth of material in the intracluster light over the same period., Accepted for publication in ApJ, 9 pages (updated with additional references)
Published: 2010

21. The ratio of luminous to faint red-sequence galaxies in X-ray and optically selected low-redshift clusters

Author: John P. Stott, Chris A. Collins, and Diego Capozzi
Subjects: Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, X-ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, Galaxy, Luminosity, Space and Planetary Science, Sky, ROSAT, Cluster sampling, Astrophysics::Galaxy Astrophysics, Galaxy cluster, Astrophysics - Cosmology and Nongalactic Astrophysics, media_common
Abstract: We study the ratio of luminous-to-faint red sequence galaxies in both optically and X-ray selected galaxy clusters in the poorly studied redshift range 0.05< z, 11 pages, 6 figures, 3 tables. Accepted for publication by MNRAS
Published: 2010

22. Wide-field lensing mass maps from Dark Energy Survey science verification data

Author: G. Gutierrez, Joe Zuntz, Risa H. Wechsler, E. Suchyta, Francisco J. Castander, August E. Evrard, Peter Melchior, D. J. Brout, Adam Amara, M. T. Busha, Michael Troxel, Matt J. Jarvis, Ricardo L. C. Ogando, D. James, T. M. C. Abbott, Tim Eifler, Daniel Gruen, J. J. Thaler, Hiranya V. Peiris, T. Kacprzak, F. B. Abdalla, E. J. Sanchez, G. Tarle, C. Bonnett, Shantanu Desai, Douglas L. Tucker, Kyler Kuehn, Peter Doel, M. A. G. Maia, A. A. Plazas, William G. Hartley, David J. Brooks, Joshua A. Frieman, Sarah Bridle, Chihway Chang, Matthew R. Becker, Flavia Sobreira, H. T. Diehl, David Bacon, Diego Capozzi, J. Annis, D. L. Burke, A. H. Bauer, M. Sako, A. Kovács, Erin Sheldon, A. Roodman, Gary Bernstein, Bhuvnesh Jain, M. March, Eduardo Rozo, S. Allam, Robert A. Gruendl, Pablo Fosalba, Huan Lin, Steve Kent, Robert Connon Smith, Ramon Miquel, J. P. Dietrich, N. Kuropatkin, Ofer Lahav, B. Flaugher, C. B. D'Andrea, I. Sevilla, A. Benoit-Lévy, Eric H. Neilsen, Martin Crocce, K. W. Merritt, A. K. Romer, Vinu Vikram, Paul Martini, A. Fausti Neto, K. Honscheid, Eli S. Rykoff, A. Carnero Rosell, M. Carrasco Kind, Robert C. Nichol, Christopher J. Miller, Carles Sanchez, Daniel Thomas, Enrique Gaztanaga, E. Buckley-Geer, Alistair R. Walker, and Marcelle Soares-Santos
Subjects: Physics, Cold dark matter, Dark matter, General Physics and Astronomy, Astrophysics, Cosmological constant, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmology, Galaxy, Dark energy, Galaxy cluster, Weak gravitational lensing, Astrophysics::Galaxy Astrophysics, QB
Abstract: We present a mass map reconstructed from weak gravitational lensing shear measurements over 139 deg2 from the Dark Energy Survey science verification data. The mass map probes both luminous and dark matter, thus providing a tool for studying cosmology. We find good agreement between the mass map and the distribution of massive galaxy clusters identified using a red-sequence cluster finder. Potential candidates for superclusters and voids are identified using these maps. We measure the cross-correlation between the mass map and a magnitude-limited foreground galaxy sample and find a detection at the 6.8 sigma level with 20 arc min smoothing. These measurements are consistent with simulated galaxy catalogs based on N -body simulations from a cold dark matter model with a cosmological constant. This suggests low systematics uncertainties in the map. We summarize our key findings in this Letter; the detailed methodology and tests for systematics are presented in a companion paper.
Published: 2015

23. Wide-field lensing mass maps from Dark Energy Survey science verification data: methodology and detailed analysis

Author: I. Sevilla, A. Benoit-Lévy, Joe Zuntz, H. T. Diehl, David Bacon, A. H. Bauer, Ramon Miquel, K. Honscheid, V. Scarpine, Eli S. Rykoff, E. Bertin, K. W. Merritt, G. Tarle, Francisco J. Castander, A. Kovács, Eric H. Neilsen, Gary Bernstein, A. K. Romer, B. Flaugher, Darren L. DePoy, Martin Crocce, C. B. D'Andrea, Paul Martini, A. Carnero Rosell, Sarah Bridle, William G. Hartley, Chihway Chang, Huan Lin, Alistair R. Walker, A. Fausti Neto, Kyler Kuehn, Juan Estrada, Marcelle Soares-Santos, Steve Kent, Boris Leistedt, Matthew R. Becker, Flavia Sobreira, E. Fernandez, J. P. Dietrich, N. Kuropatkin, Jochen Weller, D. L. Burke, Daniel Gruen, Christopher J. Miller, Jennifer L. Marshall, Vinu Vikram, C. Bonnett, T. M. C. Abbott, Robert A. Gruendl, Shantanu Desai, D. W. Gerdes, L. N. da Costa, A. A. Plazas, Hiranya V. Peiris, Diego Capozzi, E. J. Sanchez, Michael Troxel, P. Fosalba, Daniel Thomas, E. Buckley-Geer, Carlos Cunha, D. J. Brout, Eduardo Rozo, T. Kacprzak, F. B. Abdalla, M. T. Busha, M. March, Adam Amara, Matt J. Jarvis, Ofer Lahav, David J. Brooks, Robert Connon Smith, Robert Armstrong, Brian Nord, D. James, Martin Makler, E. Suchyta, August E. Evrard, J. J. Thaler, Bhuvnesh Jain, M. A. G. Maia, Peter Melchior, Ricardo L. C. Ogando, Erin Sheldon, Risa H. Wechsler, M. E. C. Swanson, M. Carrasco Kind, Tianjun Li, Robert C. Nichol, M. Banerji, Joshua A. Frieman, A. Roodman, Carles Sanchez, and Enrique Gaztanaga
Subjects: Physics, Nuclear and High Energy Physics, media_common.quotation_subject, Dark matter, Astronomy, RCUK, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Redshift, Cosmology, Sky, Dark energy, astro-ph.CO, Weak gravitational lensing, Smoothing, STFC, Astrophysics::Galaxy Astrophysics, media_common, QB
Abstract: Weak gravitational lensing allows one to reconstruct the spatial distribution of the projected mass density across the sky. These "mass maps" provide a powerful tool for studying cosmology as they probe both luminous and dark matter. In this paper, we present a weak lensing mass map reconstructed from shear measurements in a 139 deg2 area from the Dark Energy Survey (DES) Science Verification (SV) data overlapping with the South Pole Telescope survey. We compare the distribution of mass with that of the foreground distribution of galaxies and clusters. The overdensities in the reconstructed map correlate well with the distribution of optically detected clusters. Cross-correlating the mass map with the foreground galaxies from the same DES SV data gives results consistent with mock catalogs that include the primary sources of statistical uncertainties in the galaxy, lensing, and photo-z catalogs. The statistical significance of the cross-correlation is at the 6.8 sigma level with 20 arcminute smoothing. A major goal of this study is to investigate systematic effects arising from a variety of sources, including PSF and photo-z uncertainties. We make maps derived from twenty variables that may characterize systematics and find the principal components. We find that the contribution of systematics to the lensing mass maps is generally within measurement uncertainties. We test and validate our results with mock catalogs from N-body simulations. In this work, we analyze less than 3% of the final area that will be mapped by the DES; the tools and analysis techniques developed in this paper can be applied to forthcoming larger datasets from the survey.
Published: 2015

24. Stellar kinematics and metallicities in the ultra-faint dwarf galaxy Reticulum II

Author: Michael Schubnell, W. C. Wester, P. Martini, Joshua A. Frieman, Risa H. Wechsler, B. Flaugher, D. James, M. Sako, Juan Estrada, Gary Bernstein, J. J. Thaler, Scott Dodelson, Carlos E. Cunha, Huan Lin, Eduardo Balbinot, Tianjun Li, Jennifer L. Marshall, A. Roodman, Flavia Sobreira, David J. Brooks, Douglas L. Tucker, Kyler Kuehn, E. S. Rykoff, C. B. D'Andrea, B. Yanny, Ramon Miquel, G. Tarle, Steve Kent, S. Desai, H. T. Diehl, Ofer Lahav, M. E. C. Swanson, M. A. G. Maia, Diego Capozzi, Alex Drlica-Wagner, M. March, Basilio X. Santiago, A. H. Bauer, M. Carrasco Kind, Darren L. DePoy, T. M. C. Abbott, Louis E. Strigari, I. Sevilla, K. Honscheid, Alistair R. Walker, Robert Connon Smith, E. Suchyta, August E. Evrard, Vinu Vikram, Marla Geha, D. L. Burke, Marcelle Soares-Santos, M. H.L.S. Wang, E. J. Sanchez, Ricardo L. C. Ogando, E. Bertin, Brian Nord, D. A. Finley, N. Kuropatkin, L. N. da Costa, A. Carnero Rosell, Robert A. Gruendl, C. J. Miller, E. Buckley-Geer, Daniel Gruen, J. D. Simon, Enrique Gaztanaga, D. W. Gerdes, Enrique J. Fernández, A. K. Romer, A. Fausti Neto, and Keith Bechtol
Subjects: individual (Reticulum II) [galaxies], Stellar kinematics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), dwarf [galaxies], Metallicity, Milky Way, Dark matter, FOS: Physical sciences, Astrophysics, 01 natural sciences, dark matter, 0103 physical sciences, 010303 astronomy & astrophysics, STFC, Dwarf galaxy, QB, Physics, 010308 nuclear & particles physics, RCUK, Velocity dispersion, Astronomy and Astrophysics, stellar content [galaxies], Astrophysics - Astrophysics of Galaxies, Galaxy, Radial velocity, bundances [stars], Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Local Group, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present Magellan/M2FS, VLT/GIRAFFE, and Gemini South/GMOS spectroscopy of the newly discovered Milky Way satellite Reticulum II. Based on the spectra of 25 Ret II member stars selected from Dark Energy Survey imaging, we measure a mean heliocentric velocity of 62.8 +/- 0.5 km/s and a velocity dispersion of 3.3 +/- 0.7 km/s. The mass-to-light ratio of Ret II within its half-light radius is 470 +/- 210 Msun/Lsun, demonstrating that it is a strongly dark matter-dominated system. Despite its spatial proximity to the Magellanic Clouds, the radial velocity of Ret II differs from that of the LMC and SMC by 199 and 83 km/s, respectively, suggesting that it is not gravitationally bound to the Magellanic system. The likely member stars of Ret II span 1.3 dex in metallicity, with a dispersion of 0.28 +/- 0.09 dex, and we identify several extremely metal-poor stars with [Fe/H] < -3. In combination with its luminosity, size, and ellipticity, these results confirm that Ret II is an ultra-faint dwarf galaxy. With a mean metallicity of [Fe/H] = -2.65 +/- 0.07, Ret II matches Segue~1 as the most metal-poor galaxy known. Although Ret II is the third-closest dwarf galaxy to the Milky Way, the line-of-sight integral of the dark matter density squared is log J = 18.8 +/- 0.6 Gev^2/cm^5 within 0.2 degrees, indicating that the predicted gamma-ray flux from dark matter annihilation in Ret II is lower than that of several other dwarf galaxies., 14 pages, 6 figures (4 in color), 2 tables. Accepted for publication in the Astrophysical Journal. Only minor changes from v1
Published: 2015

25. The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

Author: Shadab Alam, Franco D. Albareti, Carlos Allende Prieto, F. Anders, Scott F. Anderson, Timothy Anderton, Brett H. Andrews, Eric Armengaud, Éric Aubourg, Stephen Bailey, Sarbani Basu, Julian E. Bautista, Rachael L. Beaton, Timothy C. Beers, Chad F. Bender, Andreas A. Berlind, Florian Beutler, Vaishali Bhardwaj, Jonathan C. Bird, Dmitry Bizyaev, Cullen H. Blake, Michael R. Blanton, Michael Blomqvist, John J. Bochanski, Adam S. Bolton, Jo Bovy, A. Shelden Bradley, W. N. Brandt, D. E. Brauer, J. Brinkmann, Peter J. Brown, Joel R. Brownstein, Angela Burden, Etienne Burtin, Nicolás G. Busca, Zheng Cai, Diego Capozzi, Aurelio Carnero Rosell, Michael A. Carr, Ricardo Carrera, K. C. Chambers, William James Chaplin, Yen-Chi Chen, Cristina Chiappini, S. Drew Chojnowski, Chia-Hsun Chuang, Nicolas Clerc, Johan Comparat, Kevin Covey, Rupert A. C. Croft, Antonio J. Cuesta, Katia Cunha, Luiz N. da Costa, Nicola Da Rio, James R. A. Davenport, Kyle S. Dawson, Nathan De Lee, Timothée Delubac, Rohit Deshpande, Saurav Dhital, Letícia Dutra-Ferreira, Tom Dwelly, Anne Ealet, Garrett L. Ebelke, Edward M. Edmondson, Daniel J. Eisenstein, Tristan Ellsworth, Yvonne Elsworth, Courtney R. Epstein, Michael Eracleous, Stephanie Escoffier, Massimiliano Esposito, Michael L. Evans, Xiaohui Fan, Emma Fernández-Alvar, Diane Feuillet, Nurten Filiz Ak, Hayley Finley, Alexis Finoguenov, Kevin Flaherty, Scott W. Fleming, Andreu Font-Ribera, Jonathan Foster, Peter M. Frinchaboy, J. G. Galbraith-Frew, Rafael A. García, D. A. García-Hernández, Ana E. García Pérez, Patrick Gaulme, Jian Ge, R. Génova-Santos, A. Georgakakis, Luan Ghezzi, Bruce A. Gillespie, Léo Girardi, Daniel Goddard, Satya Gontcho A Gontcho, Jonay I. González Hernández, Eva K. Grebel, Paul J. Green, Jan Niklas Grieb, Nolan Grieves, James E. Gunn, Hong Guo, Paul Harding, Sten Hasselquist, Suzanne L. Hawley, Michael Hayden, Fred R. Hearty, Saskia Hekker, Shirley Ho, David W. Hogg, Kelly Holley-Bockelmann, Jon A. Holtzman, Klaus Honscheid, Daniel Huber, Joseph Huehnerhoff, Inese I. Ivans, Linhua Jiang, Jennifer A. Johnson, Karen Kinemuchi, David Kirkby, Francisco Kitaura, Mark A. Klaene, Gillian R. Knapp, Jean-Paul Kneib, Xavier P. Koenig, Charles R. Lam, Ting-Wen Lan, Dustin Lang, Pierre Laurent, Jean-Marc Le Goff, Alexie Leauthaud, Khee-Gan Lee, Young Sun Lee, Timothy C. Licquia, Jian Liu, Daniel C. Long, Martín López-Corredoira, Diego Lorenzo-Oliveira, Sara Lucatello, Britt Lundgren, Robert H. Lupton, Claude E. Mack III, Suvrath Mahadevan, Marcio A. G. Maia, Steven R. Majewski, Elena Malanushenko, Viktor Malanushenko, A. Manchado, Marc Manera, Qingqing Mao, Claudia Maraston, Robert C. Marchwinski, Daniel Margala, Sarah L. Martell, Marie Martig, Karen L. Masters, Savita Mathur, Cameron K. McBride, Peregrine M. McGehee, Ian D. McGreer, Richard G. McMahon, Brice Ménard, Marie-Luise Menzel, Andrea Merloni, Szabolcs Mészáros, Adam A. Miller, Jordi Miralda-Escudé, Hironao Miyatake, Antonio D. Montero-Dorta, Surhud More, Eric Morganson, Xan Morice-Atkinson, Heather L. Morrison, Benôit Mosser, Demitri Muna, Adam D. Myers, Kirpal Nandra, Jeffrey A. Newman, Mark Neyrinck, Duy Cuong Nguyen, Robert C. Nichol, David L. Nidever, Pasquier Noterdaeme, Sebastián E. Nuza, Julia E. O’Connell, Robert W. O’Connell, Ross O’Connell, Ricardo L. C. Ogando, Matthew D. Olmstead, Audrey E. Oravetz, Daniel J. Oravetz, Keisuke Osumi, Russell Owen, Deborah L. Padgett, Nikhil Padmanabhan, Martin Paegert, Nathalie Palanque-Delabrouille, Kaike Pan, John K. Parejko, Isabelle Pâris, Changbom Park, Petchara Pattarakijwanich, M. Pellejero-Ibanez, Joshua Pepper, Will J. Percival, Ismael Pérez-Fournon, Ignasi Pe´rez-Ra`fols, Patrick Petitjean, Matthew M. Pieri, Marc H. Pinsonneault, Gustavo F. Porto de Mello, Francisco Prada, Abhishek Prakash, Adrian M. Price-Whelan, Pavlos Protopapas, M. Jordan Raddick, Mubdi Rahman, Beth A. Reid, James Rich, Hans-Walter Rix, Annie C. Robin, Constance M. Rockosi, Thaíse S. Rodrigues, Sergio Rodríguez-Torres, Natalie A. Roe, Ashley J. Ross, Nicholas P. Ross, Graziano Rossi, John J. Ruan, J. A. Rubiño-Martín, Eli S. Rykoff, Salvador Salazar-Albornoz, Mara Salvato, Lado Samushia, Ariel G. Sánchez, Basílio Santiago, Conor Sayres, Ricardo P. Schiavon, David J. Schlegel, Sarah J. Schmidt, Donald P. Schneider, Mathias Schultheis, Axel D. Schwope, C. G. Scóccola, Caroline Scott, Kris Sellgren, Hee-Jong Seo, Aldo Serenelli, Neville Shane, Yue Shen, Matthew Shetrone, Yiping Shu, V. Silva Aguirre, Thirupathi Sivarani, M. F. Skrutskie, Anže Slosar, Verne V. Smith, Flávia Sobreira, Diogo Souto, Keivan G. Stassun, Matthias Steinmetz, Dennis Stello, Michael A. Strauss, Alina Streblyanska, Nao Suzuki, Molly E. C. Swanson, Jonathan C. Tan, Jamie Tayar, Ryan C. Terrien, Aniruddha R. Thakar, Daniel Thomas, Neil Thomas, Benjamin A. Thompson, Jeremy L. Tinker, Rita Tojeiro, Nicholas W. Troup, Mariana Vargas-Magaña, Jose A. Vazquez, Licia Verde, Matteo Viel, Nicole P. Vogt, David A. Wake, Ji Wang, Benjamin A. Weaver, David H. Weinberg, Benjamin J. Weiner, Martin White, John C. Wilson, John P. Wisniewski, W. M. Wood-Vasey, Christophe Ye`che, Donald G. York, Nadia L. Zakamska, O. Zamora, Gail Zasowski, Idit Zehavi, Gong-Bo Zhao, Zheng Zheng, Xu Zhou (周旭), Zhimin Zhou (周志民), Hu Zou (邹虎), Guangtun Zhu, UAM. Departamento de Física Teórica, University of St Andrews. School of Physics and Astronomy, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), SDSS Collaboration, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), ITA, USA, GBR, FRA, DEU, ESP, CHN, and Department of Physics
Subjects: 10TH DATA RELEASE, OSCILLATION SPECTROSCOPIC SURVEY, purl.org/becyt/ford/1 [https], SOLAR-LIKE STARS, QB Astronomy, Astrophysics::Solar and Stellar Astrophysics, ComputingMilieux_MISCELLANEOUS, QC, QB, media_common, Physics, Astrophysics::Instrumentation and Methods for Astrophysics, Celestial sphere, Composicao estelar, Exoplanet, Radial velocity, atlases, Astrophysics - Solar and Stellar Astrophysics, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, MAIN-SEQUENCE STARS, FIXED-DELAY INTERFEROMETRY, Cosmology and Gravitation, astro-ph.SR, GALACTIC EVOLUTION EXPERIMENT, astro-ph.GA, media_common.quotation_subject, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, catalogs, surveys, Movimento estelar, Settore FIS/05 - Astronomia e Astrofisica, BROWN DWARF CANDIDATE, LOW-MASS STELLAR, ST/J500665/1, Galáxias, Instrumentation and Methods for Astrophysics (astro-ph.IM), Quasars, Spectrograph, STFC, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], RCUK, Astronomy, Física, DAS, Astronomy and Astrophysics, Quasar, purl.org/becyt/ford/1.3 [https], 115 Astronomy, Space science, Astrophysics - Astrophysics of Galaxies, Espectros estelares, Galaxy, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], 1ST DATA RELEASE, Stars, QC Physics, 13. Climate action, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), Catalogos astronomicos, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], BARYON ACOUSTIC-OSCILLATIONS, astro-ph.IM
Abstract: The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. All the data from SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all data acquired through 2013 July, and Data Release 12 (DR12) adding data acquired through 2014 July (including all data included in previous data releases), marking the end of SDSS-III observing. Relative to our previous public release (DR10), DR12 adds one million new spectra of galaxies and quasars from the Baryon Oscillation Spectroscopic Survey (BOSS) over an additional 3000 sq. deg of sky, more than triples the number of H-band spectra of stars as part of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE), and includes repeated accurate radial velocity measurements of 5500 stars from the Multi-Object APO Radial Velocity Exoplanet Large-area Survey (MARVELS). The APOGEE outputs now include measured abundances of 15 different elements for each star. In total, SDSS-III added 2350 sq. deg of ugriz imaging; 155,520 spectra of 138,099 stars as part of the Sloan Exploration of Galactic Understanding and Evolution 2 (SEGUE-2) survey; 2,497,484 BOSS spectra of 1,372,737 galaxies, 294,512 quasars, and 247,216 stars over 9376 sq. deg; 618,080 APOGEE spectra of 156,593 stars; and 197,040 MARVELS spectra of 5,513 stars. Since its first light in 1998, SDSS has imaged over 1/3 of the Celestial sphere in five bands and obtained over five million astronomical spectra., Comment: DR12 data are available at http://www.sdss3.org/dr12. 30 pages. 11 figures. Accepted to ApJS
Published: 2015

26. Constraints on the Richness-Mass Relation and the Optical-SZE Positional Offset Distribution for SZE-Selected Clusters

Author: Ricardo L. C. Ogando, Martin Crocce, A. Roodman, David J. Brooks, Robert Armstrong, A. A. Plazas, Joseph J. Mohr, Jochen Weller, Mark Brodwin, Diego Capozzi, W. L. Holzapfel, M. A. G. Maia, J. J. Thaler, E. Bertin, C. Gangkofner, A. Saro, David J. James, T. M. C. Abbott, Ofer Lahav, M. Carrasco Kind, E. Fernandez, R. Covarrubias, Robert Connon Smith, Darren L. DePoy, Alistair R. Walker, Pablo Fosalba, Marcelle Soares-Santos, R. Capasso, V. Strazzullo, E. J. Sanchez, Michael McDonald, B. Stalder, Gary Bernstein, Risa H. Wechsler, V. Upadhyay, Enrique Gaztanaga, Vinu Vikram, Huan Lin, Lindsey Bleem, T. M. Crawford, John E. Carlstrom, Peter Melchior, Tianjun Li, Shantanu Desai, Sebastian Bocquet, Brian Nord, Bhuvnesh Jain, Peter Doel, J. P. Dietrich, A. von der Linden, Bradford Benson, Daniel Thomas, M. E. C. Swanson, I. Sevilla, E. Buckley-Geer, Michael Schubnell, F. B. Abdalla, Scott Dodelson, A. Benoit-Lévy, Carlos E. Cunha, T. de Haan, H. T. Diehl, Jennifer L. Marshall, Christian L. Reichardt, D. L. Burke, Tim Eifler, Antony A. Stark, A. H. Bauer, S. Allam, Robert A. Gruendl, Alfredo Zenteno, Flavia Sobreira, I-Non Chiu, C. Hennig, B. Flaugher, C. B. D'Andrea, M. March, Ramon Miquel, Eduardo Rozo, K. E. Ziegler, A. K. Romer, Paul Martini, W. C. Wester, A. Fausti Neto, K. Honscheid, Christopher J. Miller, Matthew B. Bayliss, Eli S. Rykoff, N. Kuropatkin, L. N. da Costa, M. Banerji, Joshua A. Frieman, A. Carnero Rosell, M. Sako, Douglas L. Tucker, Kyler Kuehn, Gregory Tarle, Nikhel Gupta, E. Suchyta, August E. Evrard, Daniel Gruen, D. W. Gerdes, Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, McDonald, Michael A., Saro, A., Bocquet, S., Rozo, E., Benson, B. A., Mohr, J., Rykoff, E. S., Soares-Santos, M., Bleem, L., Dodelson, S., Melchior, P., Sobreira, F., Upadhyay, V., Weller, J., Abbott, T., Abdalla, F. B., Allam, S., Armstrong, R., Banerji, M., Bauer, A. H., Bayliss, M., Benoit-Lévy, A., Bernstein, G. M., Bertin, E., Brodwin, M., Brooks, D., Buckley-Geer, E., Burke, D. L., Carlstrom, J. E., Capasso, R., Capozzi, D., Carnero Rosell, A., Carrasco Kind, M., Chiu, I., Covarrubias, R., Crawford, T. M., Crocce, M., D'Andrea, C. B., da Costa, L. N., Depoy, D. L., Desai, S., de Haan, T., Diehl, H. T., Dietrich, J. P., Doel, P., Cunha, C. E, Eifler, T. F., Evrard, A. E., Fausti Neto, A., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., Gangkofner, C., Gaztanaga, E., Gerdes, D., Gruen, D., Gruendl, R. A., Gupta, N., Hennig, C., Holzapfel, W. L., Honscheid, K., Jain, B., James, D., Kuehn, K., Kuropatkin, N., Lahav, O., Li, T. S., Lin, H., Maia, M. A. G., March, M., Marshall, J. L., Martini, Paul, Mcdonald, M., Miller, C. J., Miquel, R., Nord, B., Ogando, R., Plazas, A. A., Reichardt, C. L., Romer, A. K., Roodman, A., Sako, M., Sanchez, E., Schubnell, M., Sevilla, I., Smith, R. C., Stalder, B., Stark, A. A., Strazzullo, V., Suchyta, E., Swanson, M. E. C., Tarle, G., Thaler, J., Thomas, D., Tucker, D., Vikram, V., von der Linden, A., Walker, A. R., Wechsler, R. H., Wester, W., Zenteno, A., and Ziegler, K. E.
Subjects: statistics [galaxies], Large-scale structure of Universe, Galaxies: abundances, Astrophysics, abundance [Galaxies], miscellaneous [cosmology], Lambda, Catalogue, 01 natural sciences, haloe [Galaxies], clusters: general [galaxies], 010303 astronomy & astrophysics, catalogues, QB, Physics, education.field_of_study, Sigma, haloes [galaxies], South Pole Telescope, astro-ph.CO, large-scale structure of Universe, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics and Astronomy, Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Galaxies: statistics, Cosmology: miscellaneous, Population, FOS: Physical sciences, Methods: data analysis, abundances [galaxies], 0103 physical sciences, data analysis [methods], Cluster (physics), miscellaneou [Cosmology], Galaxies: haloes, education, STFC, Galaxy cluster, Catalogues, Galaxies: clusters: general, Astronomy and Astrophysics, Space and Planetary Science, statistic [Galaxies], 010308 nuclear & particles physics, RCUK, Astronomy, Astronomy and Astrophysic, Redshift, data analysi [Methods], Dark energy
Abstract: We cross-match galaxy cluster candidates selected via their Sunyaev–Zel'dovich effect (SZE) signatures in 129.1 deg[superscript 2] of the South Pole Telescope 2500d SPT-SZ survey with optically identified clusters selected from the Dark Energy Survey science verification data. We identify 25 clusters between 0.1 ≲ z ≲ 0.8 in the union of the SPT-SZ and redMaPPer (RM) samples. RM is an optical cluster finding algorithm that also returns a richness estimate for each cluster. We model the richness λ-mass relation with the following function 〈ln λ|M500〉 ∝ Bλln M500 + Cλln E(z) and use SPT-SZ cluster masses and RM richnesses λ to constrain the parameters. We find Bλ=1.14[superscript +0.21][subscript −0.18 and Cλ=0.73[superscript +0.77][subscript −0.75]. The associated scatter in mass at fixed richness is σlnM|λ=0.18[superscript +0.08][subscript −0.05] at a characteristic richness λ = 70. We demonstrate that our model provides an adequate description of the matched sample, showing that the fraction of SPT-SZ-selected clusters with RM counterparts is consistent with expectations and that the fraction of RM-selected clusters with SPT-SZ counterparts is in mild tension with expectation. We model the optical-SZE cluster positional offset distribution with the sum of two Gaussians, showing that it is consistent with a dominant, centrally peaked population and a subdominant population characterized by larger offsets. We also cross-match the RM catalogue with SPT-SZ candidates below the official catalogue threshold significance ξ = 4.5, using the RM catalogue to provide optical confirmation and redshifts for 15 additional clusters with ξ ∈ [4, 4.5]., Kavli Foundation, Gordon and Betty Moore Foundation (Grant GBMF 947)
Published: 2015

27. Observation of Two New L4 Neptune Trojans in the Dark Energy Survey Supernova Fields

Author: E. Suchyta, G. Tarle, J. J. Thaler, Carlos E. Cunha, Ramon Miquel, A. K. Romer, M. A. G. Maia, Robert Connon Smith, J. Carretero, A. Fausti Neto, Shantanu Desai, M. Sako, Flavia Sobreira, Richard Kessler, Michael Schubnell, Diego Capozzi, E. Buckley-Geer, C. J. Miller, Fred C. Adams, Darren L. DePoy, M. Carrasco Kind, J. P. Dietrich, P. Doel, W. C. Wester, Alistair R. Walker, Robert C. Nichol, Marcelle Soares-Santos, Ricardo L. C. Ogando, C. B. D'Andrea, M. March, Basilio X. Santiago, Tim Eifler, Enrique Gaztanaga, F. B. Abdalla, E. Bertin, Kyler Kuehn, Joshua A. Frieman, Gary Bernstein, G. Gutierrez, P. Martini, I. Sevilla-Noarbe, T. M. C. Abbott, B. Nord, David Goldstein, E. J. Sanchez, A. A. Plazas, B. Flaugher, A. Benoit-Lévy, Nikolay Kuropatkin, David J. James, D. L. Burke, S. Allam, Robert A. Gruendl, Daniel Gruen, K. Honscheid, D. W. Gerdes, Ofer Lahav, Tianjun Li, L. N. da Costa, A. Roodman, A. Carnero Rosell, Ross J. Jennings, Yanming Zhang, David Brooks, and M. E. C. Swanson
Subjects: Cosmology and Gravitation, 010504 meteorology & atmospheric sciences, media_common.quotation_subject, Lagrangian point, FOS: Physical sciences, Orbital eccentricity, 01 natural sciences, law.invention, Telescope, Neptune, law, Observatory, 0103 physical sciences, Eccentricity (behavior), 010303 astronomy & astrophysics, STFC, 0105 earth and related environmental sciences, media_common, QB, Physics, Earth and Planetary Astrophysics (astro-ph.EP), Astrophysics::Instrumentation and Methods for Astrophysics, RCUK, Astronomy, Astronomy and Astrophysics, general [asteroids], Supernova, Space and Planetary Science, astro-ph.EP, minor planets, Dark energy, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract: We report the discovery of the eighth and ninth known Trojans in stable orbits around Neptune's leading Lagrange point, L4. The objects 2014 QO$_{441}$ and 2014 QP$_{441}$ were detected in data obtained during the 2013-14 and 2014-15 observing seasons by the Dark Energy Survey, using the Dark Energy Camera (DECam) on the 4-meter Blanco telescope at Cerro Tololo Inter-American Observatory. Both are in high-inclination orbits (18.8$^{\circ}$ and 19.4$^{\circ}$ respectively). With an eccentricity of 0.104, 2014 QO$_{441}$ has the most eccentric orbit of the eleven known stable Neptune Trojans. Here we describe the search procedure and investigate the objects' long-term dynamical stability and physical properties., Comment: 11 pages, 3 figures, submitted to AJ
Published: 2015
Full Text: View/download PDF

28. On the intermediate-redshift central stellar mass-halo mass relation, and implications for the evolution of the most massive galaxies since z~1

Author: Vinu Vikram, Danilo Marchesini, Diego Capozzi, Claudia Maraston, Roy R. Gal, Marcella Carollo, Zheng Zheng, Alessandro Rettura, Vincent Bouillot, Francesco Shankar, Ravi K. Sheth, A. Meert, Marc Huertas-Company, Peter Behroozi, Begoña Ascaso, Hong Guo, Brian C. Lemaux, Mariangela Bernardi, Christopher J. Conselice, Lori M. Lubin, Andrey V. Kravtsov, Andrea Cattaneo, and Stewart Buchan
Subjects: Systematic error, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, media_common.quotation_subject, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, Galaxy formation and evolution, Astrophysics::Solar and Stellar Astrophysics, 10. No inequality, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Universe, Galaxy, Redshift, Space and Planetary Science, Mass relation, Halo, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The stellar mass-halo mass relation is a key constraint in all semi-analytic, numerical, and semi-empirical models of galaxy formation and evolution. However, its exact shape and redshift dependence remain debated. Several recent works support a relation in the local Universe steeper than previously thought. Based on the comparisons with a variety of data on massive central galaxies, we show that this steepening holds up to z~1, for stellar masses Mstar>2e11 Msun. Specifically, we find significant evidence for a high-mass end slope of ��>0.35-0.70, instead of the usual ��~0.20-0.30 reported by a number of previous results. When including the independent constraints from the recent BOSS clustering measurements, the data, independent of any systematic errors in stellar masses, tend to favor a model with a very small scatter (< 0.15 dex) in stellar mass at fixed halo mass, in the redshift range z < 0.8 and for Mstar>3e11 Msun, suggesting a close connection between massive galaxies and host halos even at relatively recent epochs. We discuss the implications of our results with respect to the evolution of the most massive galaxies since z~1., 6 pages, 4 figures. ApJ Letters, accepted
Published: 2014

29. The Dark Energy Survey and operations: Year 1

Author: Douglas L. Tucker, Alex Drlica-Wagner, Emma Beynon, S. Serrano, T. Rigby, Richard Kessler, J. Annis, Huan Lin, Tim Eifler, Matthew P. Wiesner, E. Buckley-Geer, Felipe Menanteau, H. Wilcox, E. Suchyta, K. Patton, Tenglin Li, Elisabeth Krause, Ann Elliott, Ricard Casas, H. H. Head, Jennifer L. Marshall, M. Carter, Andrea Kunder, Y. Zhang, Eric H. Neilsen, Allyn Smith, Alistair R. Walker, Peter Nugent, Robert Connon Smith, Daniel Gruen, Maayane T. Soumagnac, Marcelle Soares-Santos, L. Baruah, Erin Sheldon, R. D. Kennedy, A. Papadopoulos, Robert C. Nichol, T. M. C. Abbott, Brian Nord, T. Kacprzac, Joshua A. Frieman, C. Cuhna, R. Das, Jennifer E. Helsby, E. Sanchez Alvaro, R. Covarrubias, W. C. Wester, A. Bermeo, A. Roodman, M. W. G. Johnson, Gary Bernstein, Brian Yanny, Kara Hoffman, A. K. Romer, Jiangang Hao, Robert Armstrong, Paul Martini, D. W. Gerdes, A. Fausti Neto, Richard G. Kron, M. March, J. P. Dietrich, H. T. Diehl, D. James, K. Honscheid, Robert Williams, Peter Melchior, Niall MacCrann, James Etherington, M. Gelman, Juan Estrada, L. N. da Costa, B. Flaugher, C. B. D'Andrea, Ricardo L. C. Ogando, Claudio Bruderer, P. Rooney, J. Katsaros, Lyndsay Old, Kevin Reil, H. M. Spinka, H. Campbell, A. Pujol, Alex G. Kim, S. E. Kuhlmann, L. Clerkin, Darren L. DePoy, Don Petravick, Robert A. Gruendl, R. Poulton, Steve Kent, A. A. Plazas, and Diego Capozzi
Subjects: Telescope, Physics, Galaxy groups and clusters, Observatory, law, Dark energy, Astronomy, Baryon acoustic oscillations, Astrophysics, Cosmology, Galaxy cluster, Weak gravitational lensing, law.invention
Abstract: The Dark Energy Survey (DES) is a next generation optical survey aimed at understanding the accelerating expansion of the universe using four complementary methods: weak gravitational lensing, galaxy cluster counts, baryon acoustic oscillations, and Type Ia supernovae. To perform the 5000 sq-degree wide field and 30 sq-degree supernova surveys, the DES Collaboration built the Dark Energy Camera (DECam), a 3 square-degree, 570-Megapixel CCD camera that was installed at the prime focus of the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory (CTIO). DES started its first observing season on August 31, 2013 and observed for 105 nights through mid-February 2014. This paper describes DES “Year 1” (Y1), the strategy and goals for the first year's data, provides an outline of the operations procedures, lists the efficiency of survey operations and the causes of lost observing time, provides details about the quality of the first year's data, and hints at the “Year 2” plan and outlook.
Published: 2014

30. Photometric redshift analysis in the Dark Energy Survey science verification data

Author: Basilio X. Santiago, Adam Amara, Fang Yuan, Paulo S. Pellegrini, G. Tarle, F. Ostrovski, A. Sypniewski, Darren L. DePoy, Tamara M. Davis, Jennifer L. Marshall, C. Bonnett, Shantanu Desai, Peter Doel, A. Carnero, Ricardo L. C. Ogando, Tim Abbot, C. Lidman, Huan Lin, Marcos Lima, N. Greisel, A. Roodman, I. Sevilla-Noarbe, Arjun Dey, Syed Uddin, Douglas L. Tucker, Carles Sanchez, Kyler Kuehn, E. J. Sanchez, Enrique Gaztanaga, I. Sadeh, J. P. Bernstein, Marcio A. G. Maia, Joe Zuntz, H. T. Diehl, F. Valdes, Daniel Thomas, E. Buckley-Geer, Stephanie Jouvel, Martin Makler, William G. Hartley, P. Martí, Robert Connon Smith, M. Sako, A. G. Kim, N. Kuropatkin, A. Fausti, D. L. Burke, J. de Vicente, Richard Scalzo, Alistair R. Walker, Ofer Lahav, Karl Glazebrook, L. N. da Costa, August E. Evrard, Carlos E. Cunha, Robert J. Brunner, S. Allam, Stella Seitz, E. Fernandez, M. Carrasco Kind, Robert C. Nichol, F. B. Abdalla, D. A. Finley, J. Gschwend, Francisco J. Castander, Gary Bernstein, Markus Michael Rau, B. Flaugher, Juan Estrada, Joshua A. Frieman, Diego Capozzi, M. E. C. Swanson, M. J. Childress, K. Honscheid, D. W. Gerdes, David W. Atlee, Ramon Miquel, and Manda Banerji
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, FOS: Physical sciences, Sample (statistics), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, statistics [Galaxies], Calibration, distances and redshifts [Galaxies], Instrumentation and Methods for Astrophysics (astro-ph.IM), STFC, Photometric redshift, Physics, Mapeamentos astronômicos, surveys [Astronomical data bases], RCUK, Astronomy and Astrophysics, GALÁXIAS, Redshift survey, Redshift, Galaxy, Random forest, Space and Planetary Science, astro-ph.CO, Dark energy, Astrophysics - Instrumentation and Methods for Astrophysics, ST/K00090X/1, astro-ph.IM, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present results from a study of the photometric redshift performance of the Dark Energy Survey (DES), using the early data from a Science Verification (SV) period of observations in late 2012 and early 2013 that provided science-quality images for almost 200 sq.~deg.~at the nominal depth of the survey. We assess the photometric redshift performance using about 15000 galaxies with spectroscopic redshifts available from other surveys. These galaxies are used, in different configurations, as a calibration sample, and photo-$z$'s are obtained and studied using most of the existing photo-$z$ codes. A weighting method in a multi-dimensional color-magnitude space is applied to the spectroscopic sample in order to evaluate the photo-$z$ performance with sets that mimic the full DES photometric sample, which is on average significantly deeper than the calibration sample due to the limited depth of spectroscopic surveys. Empirical photo-$z$ methods using, for instance, Artificial Neural Networks or Random Forests, yield the best performance in the tests, achieving core photo-$z$ resolutions $\sigma_{68} \sim 0.08$. Moreover, the results from most of the codes, including template fitting methods, comfortably meet the DES requirements on photo-$z$ performance, therefore, providing an excellent precedent for future DES data sets., Comment: Published in MNRAS. This version accounts for minor comments in the journal review
Published: 2014

31. Combining Dark Energy Survey Science Verification Data with Near Infrared Data from the ESO VISTA Hemisphere Survey

Author: Syed Uddin, Sergey E. Koposov, Tamara M. Davis, Matt J. Jarvis, Karl Glazebrook, F. Yuan, A. G. Kim, Richard G. McMahon, Huan Lin, L. N. da Costa, Shantanu Desai, V. Scarpine, M. Carrasco Kind, J. Findlay, F. B. Abdalla, Michael Schubnell, Martin Makler, Francisco J. Castander, A. Merson, Stephanie Jouvel, Rob Sharp, M. Sako, M. A. G. Maia, R. A. Bernstein, Joe Zuntz, Ramon Miquel, M. E. C. Swanson, M. J. Childress, Eric H. Neilsen, Ricardo L. C. Ogando, Paulo S. Pellegrini, Marcelle Soares-Santos, Diego Capozzi, D. A. Finley, A. Carnero, Rafe Schindler, Jennifer L. Marshall, Joseph J. Mohr, B. Flaugher, Darren L. DePoy, C. Lidman, Jack Lewis, Joshua A. Frieman, J. Gschwend, E. J. Sanchez, S. Allam, Marcos Lima, Carlos González-Fernández, E. A. Gonzalez-Solares, Gregory Tarle, Douglas L. Tucker, Roberto P. Saglia, Carlos E. Cunha, Kyler Kuehn, Gary Bernstein, John Marriner, J. P. Bernstein, John Peoples, Sarah E. I. Bosman, D. W. Gerdes, J. Annis, Mike Irwin, W. C. Wester, A. Kupcu-Yoldas, K. Honscheid, Christopher J. Miller, Peter Doel, H. T. Diehl, Jon J Thaler, Risa H. Wechsler, E. Bertin, Ofer Lahav, D. Lagattuta, I. Sevilla, Manda Banerji, Carles Sanchez, Enrique Gaztanaga, S. L. Reed, Banerji, Manda [0000-0002-0639-5141], McMahon, Richard [0000-0001-8447-8869], Irwin, Mike [0000-0002-2191-9038], Koposov, Sergey [0000-0003-2644-135X], and Apollo - University of Cambridge Repository
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), astro-ph.GA, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Photometry (optics), surveys, Observatory, quasars: general, Astrophysics::Solar and Stellar Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), STFC, catalogues, Astrophysics::Galaxy Astrophysics, Photometric redshift, Physics, Near-infrared spectroscopy, Astrophysics::Instrumentation and Methods for Astrophysics, RCUK, Astronomy, Astronomy and Astrophysics, Quasar, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, galaxies: photometry, Stars, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), astro-ph.CO, galaxies: distances and redshifts, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, astro-ph.IM
Abstract: We present the combination of optical data from the Science Verification phase of the Dark Energy Survey (DES) with near infrared data from the ESO VISTA Hemisphere Survey (VHS). The deep optical detections from DES are used to extract fluxes and associated errors from the shallower VHS data. Joint 7-band ($grizYJK$) photometric catalogues are produced in a single 3 sq-deg DECam field centred at 02h26m$-$04d36m where the availability of ancillary multi-wavelength photometry and spectroscopy allows us to test the data quality. Dual photometry increases the number of DES galaxies with measured VHS fluxes by a factor of $\sim$4.5 relative to a simple catalogue level matching and results in a $\sim$1.5 mag increase in the 80\% completeness limit of the NIR data. Almost 70\% of DES sources have useful NIR flux measurements in this initial catalogue. Photometric redshifts are estimated for a subset of galaxies with spectroscopic redshifts and initial results, although currently limited by small number statistics, indicate that the VHS data can help reduce the photometric redshift scatter at both $z1$. We present example DES+VHS colour selection criteria for high redshift Luminous Red Galaxies (LRGs) at $z\sim0.7$ as well as luminous quasars. Using spectroscopic observations in this field we show that the additional VHS fluxes enable a cleaner selection of both populations with $, Comment: 18 pages, 11 figures, Accepted for publication in MNRAS
Published: 2014
Full Text: View/download PDF

32. The XMM Cluster Survey: The Stellar Mass Assembly of Fossil Galaxies

Author: E. J. Lloyd-Davies, A. Kathy Romer, Martin Sahlén, Chris A. Collins, Craig D. Harrison, John P. Stott, S. Adam Stanford, Nicola Mehrtens, Christopher J. Miller, Diego Capozzi, Andrew R. Liddle, Pedro T. P. Viana, Matt Hilton, Ben Hoyle, Paul James Deadman, and Joseph W. Richards
Subjects: Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, 010308 nuclear & particles physics, Star formation, media_common.quotation_subject, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy merger, 01 natural sciences, Galaxy, Luminosity, Space and Planetary Science, Sky, 0103 physical sciences, Magnitude (astronomy), Cluster (physics), 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, QB, media_common
Abstract: This paper presents both the result of a search for fossil systems (FSs) within the XMM Cluster Survey and the Sloan Digital Sky Survey and the results of a study of the stellar mass assembly and stellar populations of their fossil galaxies. In total, 17 groups and clusters are identified at z < 0.25 with large magnitude gaps between the first and fourth brightest galaxies. All the information necessary to classify these systems as fossils is provided. For both groups and clusters, the total and fractional luminosity of the brightest galaxy is positively correlated with the magnitude gap. The brightest galaxies in FSs (called fossil galaxies) have stellar populations and star formation histories which are similar to normal brightest cluster galaxies (BCGs). However, at fixed group/cluster mass, the stellar masses of the fossil galaxies are larger compared to normal BCGs, a fact that holds true over a wide range of group/cluster masses. Moreover, the fossil galaxies are found to contain a significant fraction of the total optical luminosity of the group/cluster within 0.5R200, as much as 85%, compared to the non-fossils, which can have as little as 10%. Our results suggest that FSs formed early and in the highest density regions of the universe and that fossil galaxies represent the end products of galaxy mergers in groups and clusters. The online FS catalog can be found at http://www.astro.ljmu.ac.uk/~xcs/Harrison2012/XCSFSCat.html., 30 pages, 50 figures. ApJ published version, online FS catalog added: http://www.astro.ljmu.ac.uk/~xcs/Harrison2012/XCSFSCat.html
Published: 2012
Full Text: View/download PDF

33. A Dark Energy Camera Search for an Optical Counterpart to the First Advanced LIGO Gravitational Wave Event GW150914

Author: V. Vikram, John Marriner, Alex Drlica-Wagner, Daniel E. Holz, S. Allam, Robert A. Gruendl, Ricardo L. C. Ogando, Raffaella Margutti, E. Buckley-Geer, K. Honscheid, Brian D. Metzger, Eric H. Neilsen, Ramon Miquel, G. Gutierrez, Masao Sako, Martin Crocce, Risa H. Wechsler, J. Carretero, Wen-fai Fong, Christopher J. Miller, D. L. Tucker, Daniel A. Goldstein, A. K. Romer, Juan Garcia-Bellido, M. S. Schubnell, H. S. Chen, Eliot Quataert, Richard Kessler, Eli S. Rykoff, Paul Martini, D. L. Burke, B. Flaugher, C. B. D'Andrea, Jochen Weller, Alistair R. Walker, Tim Eifler, Philip S. Cowperthwaite, F. B. Abdalla, P. J. Sutton, Nikolay Kuropatkin, L. N. da Costa, Marcelle Soares-Santos, August E. Evrard, J. P. Dietrich, Richard G. McMahon, John Peoples, R. C. Thomas, J. A. Fischer, M. Carrasco Kind, Rafe Schindler, V. Scarpine, Jon J Thaler, E. Fernandez, A. Carnero Rosell, Daniel Scolnic, Robert C. Nichol, Duncan A. Brown, A. A. Plazas, A. Benoit-Lévy, D. Brout, Brian Nord, Daniel Kasen, Diego Capozzi, Armin Rest, R. C. Smith, M. E. C. Swanson, William Wester, Kyler Kuehn, Marcos Lima, Edo Berger, Enrique Gaztanaga, H. T. Diehl, Nathan Smith, D. A. Finley, R. J. Foley, E. J. Sanchez, Gregory Tarle, Stephen Fairhurst, Erin S. Sheldon, I. Karliner, S. B. Cenko, R. A. Bernstein, A. Roodman, Zoheyr Doctor, Ben Farr, Albert Stebbins, Ryan Chornock, Joshua A. Frieman, Daniel Gruen, I. Sevilla-Noarbe, E. Bertin, Tenglin Li, J. Estrada, Joseph J. Mohr, Thomas Matheson, D. W. Gerdes, Brian Yanny, Shantanu Desai, Mathew Smith, Derek B. Fox, Francisco J. Castander, Huan Lin, David J. James, Pablo Fosalba, Marcio A. G. Maia, Maria R. Drout, K. Herner, T. M. C. Abbott, Robert Armstrong, Chris L. Fryer, Ofer Lahav, Stephen M. Kent, Flavia Sobreira, M. Banerji, J. Annis, Fermilab Natl Accelerator Lab, Univ Chicago, Harvard Smithsonian Ctr Astrophys, Univ Penn, Univ Illinois, STScI, Universidade Estadual Paulista (Unesp), Natl Opt Astron Observ, UCL, Rhodes Univ, Princeton Univ, Univ Cambridge, CNRS, Univ Paris 06, Carnegie Observ, Syracuse Univ, Stanford Univ, SLAC Natl Accelerator Lab, Univ Portsmouth, Lab Interinst & Astron LIneA, Observ Nacl, IEEC CSIC, Barcelona Inst Sci & Technol, NASA, Univ Maryland, Ohio Univ, Univ Southampton, Excellence Cluster Universe, Univ Munich, CALTECH, Univ Michigan, Cardiff Univ, Univ Arizona, Penn State Univ, Los Alamos Natl Lab, CIEMAT, Univ Calif Berkeley, Ohio State Univ, Australian Astron Observ, Texas A&M Univ, Universidade de São Paulo (USP), NYU, Columbia Astrophys Lab, Inst Catalana Recerca & Estudis Avancats, Max Planck Inst Extraterr Phys, Univ Sussex, Brookhaven Natl Lab, and Argonne Natl Lab
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Field (physics), close [binaries], media_common.quotation_subject, FOS: Physical sciences, Astrophysics, 01 natural sciences, neutron [stars], surveys, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, STFC, QC, media_common, QB, Physics, 010308 nuclear & particles physics, Gravitational wave, Detector, RCUK, Astronomy and Astrophysics, LIGO, gravitational waves, Space and Planetary Science, Sky, Magnitude (astronomy), astro-ph.CO, Dark energy, Astrophysics - Instrumentation and Methods for Astrophysics, Event (particle physics), catalogs, astro-ph.IM, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We report initial results of a deep search for an optical counterpart to the gravitational wave event GW150914, the first trigger from the Advanced LIGO gravitational wave detectors. We used the Dark Energy Camera (DECam) to image a 102 deg$^2$ area, corresponding to 38% of the initial trigger high-probability sky region and to 11% of the revised high-probability region. We observed in i and z bands at 4-5, 7, and 24 days after the trigger. The median $5\sigma$ point-source limiting magnitudes of our search images are i=22.5 and z=21.8 mag. We processed the images through a difference-imaging pipeline using templates from pre-existing Dark Energy Survey data and publicly available DECam data. Due to missing template observations and other losses, our effective search area subtends 40 deg$^{2}$, corresponding to 12% total probability in the initial map and 3% of the final map. In this area, we search for objects that decline significantly between days 4-5 and day 7, and are undetectable by day 24, finding none to typical magnitude limits of i= 21.5,21.1,20.1 for object colors (i-z)=1,0,-1, respectively. Our search demonstrates the feasibility of a dedicated search program with DECam and bodes well for future research in this emerging field., Comment: 6 pages, 1 figure. Updated references. Submitted to ApJL

34. Cross-correlation of gravitational lensing from DES Science Verification data with SPT and Planck lensing

Author: Martin Crocce, P. Martini, Daniel Gruen, Risa H. Wechsler, Joaquin Vieira, D. W. Gerdes, M. Sako, Andrina Nicola, David J. James, A. Benoit-Lévy, Gilbert Holder, Eli S. Rykoff, Pablo Fosalba, Gary Bernstein, C. J. Miller, Matthew R. Becker, Flavia Sobreira, A. Roodman, Marcos Lima, Tommaso Giannantonio, R. L. C. Ogando, V. Scarpine, Ramon Miquel, G. Simard, A. Carnero Rosell, M. March, Eduardo Rozo, David Brooks, M. E. C. Swanson, C. Bonnett, Adam Amara, K. Honscheid, Shantanu Desai, I. Sevilla-Noarbe, E. Suchyta, August E. Evrard, N. Kuropatkin, Alexandre Refregier, B. Flaugher, L. N. da Costa, E. Sheldon, Gregory Tarle, Peter Doel, Steve Kent, P. Larsen, Y. Omori, F. B. Abdalla, H. T. Diehl, David Bacon, Jochen Weller, Bhuvnesh Jain, Niall MacCrann, Vinu Vikram, Josh Frieman, T. M. Crawford, Michael Schubnell, M. Carrasco Kind, Robert C. Nichol, D. L. Burke, Ofer Lahav, Christian L. Reichardt, Robert A. Gruendl, Bradford Benson, R. C. Smith, Michael Troxel, K. T. Story, Tim Eifler, T. M. C. Abbott, C. B. D'Andrea, J. Carretero, T. Kacprzak, E. J. Sanchez, Daniel A. Goldstein, Kyler Kuehn, J. P. Dietrich, Sarah Bridle, Scott Dodelson, Chihway Chang, Carlos E. Cunha, R. Cawthon, Daniel Thomas, E. Buckley-Geer, Peter Melchior, R. A. Bernstein, Joe Zuntz, Donnacha Kirk, Lindsey Bleem, Marcelle Soares-Santos, M. Jarvis, A. A. Plazas, Diego Capozzi, John E. Carlstrom, UCL, McGill Univ, Univ Paris 06, CNRS, Fermilab Natl Accelerator Lab, Univ Chicago, ETH, Univ Cambridge, Univ Portsmouth, CSIC, Univ Penn, Univ Manchester, Stanford Univ, Univ Illinois, Argonne Natl Lab, Natl Opt Astron Observ, Rhodes Univ, Carnegie Observ, Barcelona Inst Sci & Technol, SLAC Natl Accelerator Lab, Lab Interinst & Astron LIneA, Observ Nacl, Natl Ctr Supercomputing Applicat, Univ Southampton, Excellence Cluster Univ, Univ Munich, CALTECH, Univ Michigan, Univ Calif Berkeley, Max Planck Inst Extraterr Phys, Ohio State Univ, Australian Astron Observ, Universidade de São Paulo (USP), Princeton Univ, Inst Catalana Rec & Estudis Avancats, Univ Melbourne, Univ Arizona, CIEMAT, and Universidade Estadual Paulista (Unesp)
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmic microwave background, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, cosmic background radiation, 01 natural sciences, Cosmology, symbols.namesake, weak [gravitational lensing], 0103 physical sciences, data analysis [methods], Planck, 010303 astronomy & astrophysics, Weak gravitational lensing, STFC, Physics, 010308 nuclear & particles physics, RCUK, Astronomy and Astrophysics, Engineering physics, Redshift, South Pole Telescope, Gravitational lens, 13. Climate action, Space and Planetary Science, symbols, Dark energy, astro-ph.CO, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We measure the cross-correlation between weak lensing of galaxy images and of the cosmic microwave background (CMB). The effects of gravitational lensing on different sources will be correlated if the lensing is caused by the same mass fluctuations. We use galaxy shape measurements from 139 deg$^{2}$ of the Dark Energy Survey (DES) Science Verification data and overlapping CMB lensing from the South Pole Telescope (SPT) and Planck. The DES source galaxies have a median redshift of $z_{\rm med} {\sim} 0.7$, while the CMB lensing kernel is broad and peaks at $z{\sim}2$. The resulting cross-correlation is maximally sensitive to mass fluctuations at $z{\sim}0.44$. Assuming the Planck 2015 best-fit cosmology, the amplitude of the DES$\times$SPT cross-power is found to be $A = 0.88 \pm 0.30$ and that from DES$\times$Planck to be $A = 0.86 \pm 0.39$, where $A=1$ corresponds to the theoretical prediction. These are consistent with the expected signal and correspond to significances of $2.9 \sigma$ and $2.2 \sigma$ respectively. We demonstrate that our results are robust to a number of important systematic effects including the shear measurement method, estimator choice, photometric redshift uncertainty and CMB lensing systematics. Significant intrinsic alignment of galaxy shapes would increase the cross-correlation signal inferred from the data; we calculate a value of $A = 1.08 \pm 0.36$ for DES$\times$SPT when we correct the observations with a simple IA model. With three measurements of this cross-correlation now existing in the literature, there is not yet reliable evidence for any deviation from the expected LCDM level of cross-correlation, given the size of the statistical uncertainties and the significant impact of systematic errors, particularly IAs. We provide forecasts for the expected signal-to-noise of the combination of the five-year DES survey and SPT-3G., Comment: 13 pages, 6 figures

35. Comparing Dark Energy Survey and HST-CLASH observations of the galaxy cluster RXC J2248.7-4431: implications for stellar mass versus dark matter

Author: Stephanie Jouvel, E. Suchyta, August E. Evrard, V. Vikram, Ramon Miquel, K. Honscheid, Robert Connon Smith, Josh Frieman, J. Annis, Daniel Thomas, E. Buckley-Geer, Peter Melchior, Yanming Zhang, Eli S. Rykoff, Peter Doel, Marcos Lima, M. Banerji, David J. Brooks, Brian Nord, W. G. Hartley, A. Benoit-Lévy, H. T. Diehl, Daniel Gruen, Marcelle Soares-Santos, Ricardo L. C. Ogando, A. Roodman, David J. James, A. Carnero Rosell, I. Sevilla-Noarbe, C. B. D'Andrea, J. Carretero, Douglas L. Tucker, T. M. C. Abbott, Kyler Kuehn, M. E. C. Swanson, Daniel A. Goldstein, D. W. Gerdes, G. Gutierrez, Flavia Sobreira, Ofer Lahav, Jennifer L. Marshall, B. Flaugher, E. J. Sanchez, Martin Crocce, M. Carrasco Kind, F. B. Abdalla, J. P. Dietrich, L. N. da Costa, Antonella Palmese, M. A. G. Maia, Gregory Tarle, Nikolay Kuropatkin, E. Bertin, Tianjun Li, J. Aleksić, C. J. Miller, Carlos E. Cunha, Juan Estrada, A. K. Romer, A. A. Plazas, Diego Capozzi, Shantanu Desai, V. Scarpine, D. L. Burke, S. Allam, Robert A. Gruendl, Stella Seitz, Tesla E. Jeltema, and Eduardo Rozo
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), astro-ph.GA, Dark matter, Library science, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, clusters: general [galaxies], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, evolution [galaxies], STFC, QB, Physics, 010308 nuclear & particles physics, European research, Astronomy, RCUK, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Fundamental physics, Dark energy, astro-ph.CO, photometry [galaxies], Christian ministry, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We derive the stellar mass fraction in the galaxy cluster RXC J2248.7-4431 observed with the Dark Energy Survey (DES) during the Science Verification period. We compare the stellar mass results from DES (five filters) with those from the Hubble Space Telescope Cluster Lensing And Supernova Survey (CLASH; 17 filters). When the cluster spectroscopic redshift is assumed, we show that stellar masses from DES can be estimated within 25% of CLASH values. We compute the stellar mass contribution coming from red and blue galaxies, and study the relation between stellar mass and the underlying dark matter using weak lensing studies with DES and CLASH. An analysis of the radial profiles of the DES total and stellar mass yields a stellar-to-total fraction of f*=(6.8+-1.7)x10^-3 within a radius of r_200c~2 Mpc. Our analysis also includes a comparison of photometric redshifts and star/galaxy separation efficiency for both data sets. We conclude that space-based small field imaging can be used to calibrate the galaxy properties in DES for the much wider field of view. The technique developed to derive the stellar mass fraction in galaxy clusters can be applied to the ~100 000 clusters that will be observed within this survey and yield important information about galaxy evolution., Comment: 16 pages, 12 figures. Changed to matched the version accepted on MNRAS

36. Weak lensing by galaxy troughs in DES Science Verification data

Author: Eli S. Rykoff, D. L. Burke, Risa H. Wechsler, Michael Troxel, Peter Doel, A. Carnero Rosell, M. Banerji, Marcos Lima, F. B. Abdalla, Kyler Kuehn, Tim Eifler, A. A. Plazas, Robert Armstrong, H. T. Diehl, R. C. Smith, V. Vikram, Diego Capozzi, A. Roodman, David Bacon, Bhuvnesh Jain, V. Scarpine, E. Suchyta, A. H. Bauer, Adam Amara, A. K. Romer, K. Honscheid, Darren L. DePoy, Martin Crocce, Robert A. Gruendl, William G. Hartley, R. A. Bernstein, Joe Zuntz, I. Sevilla-Noarbe, Daniel Thomas, A. Fausti Neto, E. Buckley-Geer, P. Martini, Yanming Zhang, Matthew R. Becker, David Brooks, Daniel Gruen, Flavia Sobreira, Sahar S. Allam, M. E. C. Swanson, Elisabeth Krause, E. Fernandez, L. N. da Costa, Christopher J. Miller, A. Mana, Ofer Lahav, M. A. G. Maia, Joseph J. Mohr, Jon J Thaler, M. Carrasco Kind, Alistair R. Walker, D. W. Gerdes, N. P. Kuropatkin, Kevin Reil, Marcelle Soares-Santos, M. March, M. S. Schubnell, Stella Seitz, Brian Nord, A. Benoit-Lévy, E. Bertin, Ramon Miquel, G. Gutierrez, Masao Sako, Gary Bernstein, Joshua A. Frieman, Gregory Tarle, Jochen Weller, Carlos Cunha, J. Carretero, T. M. C. Abbott, J. P. Dietrich, E. J. Sanchez, Tenglin Li, Sarah Bridle, C. Bonnett, Shantanu Desai, David J. James, Pablo Fosalba, B. Flaugher, C. B. D'Andrea, E. Sheldon, Tomasz Kacprzak, Ricardo L. C. Ogando, M. Jarvis, Eduardo Rozo, Oliver Friedrich, and Peter Melchior
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy merger, 01 natural sciences, weak [gravitational lensing], 0103 physical sciences, Galaxy formation and evolution, Brightest cluster galaxy, Interacting galaxy, 010303 astronomy & astrophysics, Weak gravitational lensing, Galaxy rotation curve, Astrophysics::Galaxy Astrophysics, STFC, QB, Physics, 010308 nuclear & particles physics, Astronomy, RCUK, Astronomy and Astrophysics, Galaxy, observations [cosmology], Space and Planetary Science, astro-ph.CO, Dark galaxy, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We measure the weak lensing shear around galaxy troughs, i.e. the radial alignment of background galaxies relative to underdensities in projections of the foreground galaxy field over a wide range of redshift in Science Verification data from the Dark Energy Survey. Our detection of the shear signal is highly significant (10 to 15$\sigma$ for the smallest angular scales) for troughs with the redshift range z in [0.2,0.5] of the projected galaxy field and angular diameters of 10 arcmin...1{\deg}. These measurements probe the connection between the galaxy, matter density, and convergence fields. By assuming galaxies are biased tracers of the matter density with Poissonian noise, we find agreement of our measurements with predictions in a fiducial Lambda cold dark matter model. The prediction for the lensing signal on large trough scales is virtually independent of the details of the underlying model for the connection of galaxies and matter. Our comparison of the shear around troughs with that around cylinders with large galaxy counts is consistent with a symmetry between galaxy and matter over- and underdensities. In addition, we measure the two-point angular correlation of troughs with galaxies which, in contrast to the lensing signal, is sensitive to galaxy bias on all scales. The lensing signal of troughs and their clustering with galaxies is therefore a promising probe of the statistical properties of matter underdensities and their connection to the galaxy field., Comment: 15 pages, 8 figures; matches accepted version; high-resolution versions of figures can be downloaded from http://deswl.github.io

37. Photometric redshifts and clustering of emission line galaxies selected jointly by DES and eBOSS

Author: T. M. C. Abbott, E. J. Sanchez, H. Camacho, Kevin Reil, J. Carretero, Peter Doel, M. Sako, David J. Brooks, Guangtun Zhu, Flavia Sobreira, K. Honscheid, Luiz N. da Costa, Johan Comparat, G. Gutierrez, Shantanu Desai, Huan Lin, Ofer Lahav, Tianjun Li, Juan Estrada, Ramon Miquel, Eli S. Rykoff, E. Suchyta, V. Scarpine, Marcos Lima, J. J. Thaler, David J. James, A. A. Plazas, Will J. Percival, Diego Capozzi, M. March, Basilio X. Santiago, A. De La Macora, Francisco Prada, Pablo Fosalba, E. Bertin, Jean-Paul Kneib, Jennifer L. Marshall, A. Benoit-Lévy, Y. Zhang, F. B. Abdalla, Tim Eifler, Francisco J. Castander, Gregory Tarle, Alex Merson, Joel R. Brownstein, A. Roodman, Timothée Delubac, Daniel Gruen, B. Flaugher, S. Allam, Robert A. Gruendl, D. W. Gerdes, I. Sevilla-Noarbe, N. Kuropatkin, M. Carrasco Kind, Alistair R. Walker, M. Banerji, Joshua A. Frieman, Marcelle Soares-Santos, Enrique Gaztanaga, Daniel Thomas, Kyler Kuehn, Stephanie Jouvel, M. A. G. Maia, A. Carnero, Ricardo L. C. Ogando, A. K. Romer, A. Fausti Neto, Carlos E. Cunha, 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 ), DES, BOSS, Institut d'Astrophysique de Paris (IAP), and Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Cosmology and Gravitation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Surveys, 01 natural sciences, Photometry (optics), surveys, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Emission spectrum, education, observations [Cosmology], 010303 astronomy & astrophysics, STFC, Astrophysics::Galaxy Astrophysics, Photometric redshift, QB, Physics, education.field_of_study, 010308 nuclear & particles physics, Astronomy, RCUK, Astronomy and Astrophysics, Redshift survey, redshift, target selection, DES, Redshift, Galaxy, Baryon, Space and Planetary Science, cosmology: observations, astro-ph.CO, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present the results of the first test plates of the extended Baryon Oscillation Spectroscopic Survey. This paper focuses on the emission line galaxies (ELG) population targetted from the Dark Energy Survey (DES) photometry. We analyse the success rate, efficiency, redshift distribution, and clustering properties of the targets. From the 9000 spectroscopic redshifts targetted, 4600 have been selected from the DES photometry. The total success rate for redshifts between 0.6 and 1.2 is 71\% and 68\% respectively for a bright and faint, on average more distant, samples including redshifts measured from a single strong emission line. We find a mean redshift of 0.8 and 0.87, with 15 and 13\% of unknown redshifts respectively for the bright and faint samples. In the redshift range 0.6

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Journal

Database

Publisher

37 results on '"Diego Capozzi"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources