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19 results on '"Diego Capozzi"'

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

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