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- W2093667541 endingPage "615" @default.
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- W2093667541 abstract "In this study we investigate the formation and evolution mechanisms of the brightest cluster galaxies (BCGs) over cosmic time. At high redshift ($zsim0.9$), we selected BCGs and most massive cluster galaxies (MMCGs) from the Cl1604 supercluster and compared them to low-redshift ($zsim0.1$) counterparts drawn from the MCXC meta-catalog, supplemented by SDSS imaging and spectroscopy. We observed striking differences in the morphological, color, spectral, and stellar mass properties of the BCGs/MMCGs in the two samples. High-redshift BCGs/MMCGs were, in many cases, star-forming, late-type galaxies, with blue broadband colors, properties largely absent amongst the low-redshift BCGs/MMCGs. The stellar mass of BCGs was found to increase by an average factor of $2.51pm0.71$ from $zsim0.9$ to $zsim0.1$. Through this and other comparisons we conclude that a combination of major merging (mainly wet or mixed) and emph{in situ} star formation are the main mechanisms which build stellar mass in BCGs/MMCGs. The stellar mass growth of the BCGs/MMCGs also appears to grow in lockstep with both the stellar baryonic and total mass of the cluster. Additionally, BCGs/MMCGs were found to grow in size, on average, a factor of $sim3$, while their average S'ersic index increased by $sim$0.45 from $zsim0.9$ to $zsim0.1$, also supporting a scenario involving major merging, though some adiabatic expansion is required. These observational results are compared to both models and simulations to further explore the implications on processes which shape and evolve BCGs/MMCGs over the past $sim$7 Gyr." @default.
- W2093667541 created "2016-06-24" @default.
- W2093667541 creator A5015368187 @default.
- W2093667541 creator A5030287187 @default.
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- W2093667541 creator A5055252997 @default.
- W2093667541 creator A5062530107 @default.
- W2093667541 creator A5064953454 @default.
- W2093667541 creator A5077145341 @default.
- W2093667541 date "2014-06-09" @default.
- W2093667541 modified "2023-10-15" @default.
- W2093667541 title "The violent youth of bright and massive cluster galaxies and their maturation over 7 billion years" @default.
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