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Theoretical Astrophysics and General Relativity Seminar: "BCGs and cluster galaxy populations across cosmic time"

Event Type
Department of Physics
464 Loomis
Nov 13, 2013   12:00 pm  
Yen-Ting Lin (ASIAA Taipei)
Originating Calendar
Physics - Astrophysics, Gravitation, and Cosmology Seminar

In this talk I will address a few topics related to the brightest

cluster galaxies (BCGs) and galaxy population in galaxy clusters.  I

will first review an age-old question, namely, are BCGs special, with

respect to other luminous, red galaxies in clusters?  I will then

describe a novel approach in studying the mass assembly history of

BCGs, by connecting BCGs observed at different redshifts through the

mass growth history of host clusters.  Contrasting our results to the

predictions of leading galaxy formation models suggests some

discrepancy at z<0.5.  Finally I will discuss the results from a study

of the redshift evolution of the main baryonic components in clusters,

i.e. hot intracluster medium (ICM) and galaxies, and note the curious

conclusion that while the ICM follows the self-similar expectation,

the stellar mass contained in galaxies does not appear to evolve up to


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