TY - JOUR
T1 - Exploring relations between BCG and cluster properties in the SPectroscopic IDentification of eROSITA Sources survey from 0.05 < z < 0.3
AU - Furnell, Kate E.
AU - Collins, Chris A.
AU - Kelvin, Lee S.
AU - Clerc, Nicolas
AU - Baldry, Ivan K.
AU - Finoguenov, Alexis
AU - Erfanianfar, Ghazaleh
AU - Comparat, Johan
AU - Schneider, Donald P.
N1 - Funding Information:
We thank the anonymous referee for their insightful comments that greatly improved the clarity of the paper. KEF is supported by a Science and Technologies Funding Council (STFC) award. CAC, IKB, and LSKare supported by an STFC research grant (ST/M000966/1). KEF would also like to personally thank the SPIDERS and CODEX teams for their cooperation, collaboration and support throughout this work. KEF would also like to thank LSK for his consistent advice, support, and enabling the use of the software throughout this project. This paper makes use of data from the SDSS. Funding for the SDSS-IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss.org. SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, CarnegieMellon University, the Chilean Participation Group, the French Participation Group, Harvard-Smithsonian Center for Astrophysics, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe/University of Tokyo, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam, Max-Planck-Institut für Astronomie (Heidelberg), Max-Planck-Institut für Astrophysik (Garching), Max-Planck-Institut für Extraterrestrische Physik, National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatório Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.
Funding Information:
This paper makes use of data from the SDSS. Funding for the SDSS-IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss.org.
Funding Information:
We thank the anonymous referee for their insightful comments that greatly improved the clarity of the paper. KEF is supported by a Science and Technologies Funding Council (STFC) award. CAC, IKB, and LSK are supported by an STFC research grant (ST/M000966/1). KEF would also like to personally thank the SPIDERS and CODEX teams for their cooperation, collaboration and support throughout this work. KEF would also like to thank LSK for his consistent advice, support, and enabling the use of the software throughout this project.
Publisher Copyright:
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
PY - 2018/8/21
Y1 - 2018/8/21
N2 - We present a sample of 329 low-to intermediate-redshift (0.05 < z < 0.3) brightest cluster galaxies (BCGs) in X-ray-selected clusters from the SPectroscopic IDentification of eRosita Sources survey, a spectroscopic survey within Sloan Digital Sky Survey-IV (SDSS-IV). We define our BCGs by simultaneous consideration of legacy X-ray data from ROSAT, maximumlikelihood outputs from an optical cluster-finder algorithm and visual inspection. Using SDSS imaging data, we fit Sérsic profiles to our BCGs in three bands (g, r, i) with SIGMA a GALFITbased software wrapper. We examine the reliability of our fits by running our pipeline on ~104 point spread function-convolved model profiles injected into eight random cluster fields; we then use the results of this analysis to create a robust subsample of 198 BCGs. We outline three cluster properties of interest: overall cluster X-ray luminosity (LX), cluster richness as estimated by REDMAPPER (λ),and cluster halo mass (M200), which is estimated via velocity dispersion. In general, there are significant correlations with BCG stellar mass between all three environmental properties, but no significant trends arise with either Sérsic index or effective radius. There is no major environmental dependence on the strength of the relation between effective radius and BCG stellar mass. Stellar mass therefore arises as the most important factor governing BCG morphology. Our results indicate that our sample consists of a large number of relaxed, mature clusters containing broadly homogeneous BCGs up to z ~ 0.3, suggesting that there is little evidence for much ongoing structural evolution for BCGs in these systems.
AB - We present a sample of 329 low-to intermediate-redshift (0.05 < z < 0.3) brightest cluster galaxies (BCGs) in X-ray-selected clusters from the SPectroscopic IDentification of eRosita Sources survey, a spectroscopic survey within Sloan Digital Sky Survey-IV (SDSS-IV). We define our BCGs by simultaneous consideration of legacy X-ray data from ROSAT, maximumlikelihood outputs from an optical cluster-finder algorithm and visual inspection. Using SDSS imaging data, we fit Sérsic profiles to our BCGs in three bands (g, r, i) with SIGMA a GALFITbased software wrapper. We examine the reliability of our fits by running our pipeline on ~104 point spread function-convolved model profiles injected into eight random cluster fields; we then use the results of this analysis to create a robust subsample of 198 BCGs. We outline three cluster properties of interest: overall cluster X-ray luminosity (LX), cluster richness as estimated by REDMAPPER (λ),and cluster halo mass (M200), which is estimated via velocity dispersion. In general, there are significant correlations with BCG stellar mass between all three environmental properties, but no significant trends arise with either Sérsic index or effective radius. There is no major environmental dependence on the strength of the relation between effective radius and BCG stellar mass. Stellar mass therefore arises as the most important factor governing BCG morphology. Our results indicate that our sample consists of a large number of relaxed, mature clusters containing broadly homogeneous BCGs up to z ~ 0.3, suggesting that there is little evidence for much ongoing structural evolution for BCGs in these systems.
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U2 - 10.1093/mnras/sty991
DO - 10.1093/mnras/sty991
M3 - Article
AN - SCOPUS:85050796043
SN - 0035-8711
VL - 478
SP - 4952
EP - 4973
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -