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Galaxies in X-ray Selected Clusters and Groups in Dark Energy Survey Data: Stellar Mass Growth of Bright Central Galaxies Since z~1.2 | | Y. Zhang
; C. Miller
; T. Mckay
; P. Rooney
; A. E. Evrard
; A. K. Romer
; R. Perfecto
; J. Song
; S. Desai
; J. Mohr
; H. Wilcox
; A. Bermeo
; T. Jeltema
; D. Hollowood
; D. Bacon
; D. Capozzi
; C. Collins
; R. Das
; D. Gerdes
; C. Hennig
; M. Hilton
; B. Hoyle
; S. Kay
; A. Liddle
; R. G. Mann
; N. Mehrtens
; R. C. Nichol
; C. Papovich
; M. Sahlén
; M. Soares-Santos
; J. Stott
; P. T. Viana
; T. Abbott
; F. B. Abdalla
; M. Banerji
; A.H. Bauer
; A. Benoit-Lévy
; E. Bertin
; D. Brooks
; E. Buckley-Geer
; D. L. Burke
; A. Carnero Rosell
; F. J. Castander
; H. T. Diehl
; P. Doel
; C. E Cunha
; T. F. Eifler
; A. Fausti Neto
; E. Fernandez
; B. Flaugher
; P. Fosalba
; J. Frieman
; E. Gaztanaga
; D. Gruen
; R. A. Gruendl
; K. Honscheid
; D. James
; K. Kuehn
; N. Kuropatkin
; O. Lahav
; M. A. G. Maia
; M. Makler
; J. L. Marshall
; Paul Martini
; R. Miquel
; R. Ogando
; A. A. Plazas
; A. Roodman
; E. S. Rykoff
; M. Sako
; E. Sanchez
; V. Scarpine
; M. Schubnell
; I. Sevilla
; R. C. Smith
; F. Sobreira
; E. Suchyta
; M. E. C. Swanson
; G. Tarle
; J. Thaler
; D. Tucker
; V. Vikram
; L. N. Da Costa
; | | Date: |
12 Apr 2015 | | 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, $m_{*}propto(frac{M_{200}}{1.5 imes
10^{14}M_{odot}})^{0.24pm 0.08}(1+z)^{-0.19pm0.34}$, and compare the
observed relation to the simulation 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
$0.13pm0.11$ dex, in tension at $sim 2.5 sigma$ significance level with the
0.4 dex growth rate expected in the simulation. We show that the buildup of
extended intra-cluster light after $z=1.0$ may alleviate this tension in BCG
growth rates. | | Source: | arXiv, 1504.2983 | | Services: | Forum | Review | PDF | Favorites | |
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