2015MNRAS.450.1268D


Query : 2015MNRAS.450.1268D

2015MNRAS.450.1268D - Mon. Not. R. Astron. Soc., 450, 1268-1278 (2015/June-3)

Morphological evolution in situ: disc-dominated cluster red sequences at z ∼ 1.25.

DE PROPRIS R., BREMER M.N. and PHILLIPPS S.

Abstract (from CDS):

We have carried out a joint photometric and structural analysis of red sequence galaxies in four clusters at a mean redshift of <z> ∼ 1.25 using optical and near-infrared Hubble Space Telescope imaging reaching to at least three magnitudes fainter than M*. As expected, the photometry and overall galaxy sizes imply purely passive evolution of stellar populations in red sequence cluster galaxies. However, the morphologies of red sequence cluster galaxies at these redshifts show significant differences to those of local counterparts. Apart from the most massive galaxies, the high-redshift red sequence galaxies are significantly discier than their low-redshift analogues. These galaxies also show significant colour gradients, again not present in their low-redshift equivalents, most straightforwardly explained by radial age gradients. A clear implication of these findings is that red sequence cluster galaxies originally arrive on the sequence as disc-dominated galaxies whose discs subsequently fade or evolve secularly to end up as high Sérsic index early-type galaxies (classical S0s or possibly ellipticals) at lower redshift. The apparent lack of growth seen in a comparison of high- and low-redshift red sequence galaxies implies that any evolution is internal and is unlikely to involve significant mergers. While significant star formation may have ended at high redshift, the cluster red sequence population continues to evolve (morphologically) for several gigayears thereafter.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: luminosity function, mass function

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 245 3
2 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1133 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15467 1
4 NAME ACO 901-902 Supercluster SCG 09 56 -10.0           ~ 120 1
5 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2320 0
6 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 6075 0
7 NAME XMMU J1229.4+0151 ClG 12 29 28.8 +01 51 34           ~ 24 0
8 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
9 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4374 2
10 NAME Extended Groth Strip reg 14 19 +52.8           ~ 627 0
11 ClG J1434+3427 ClG 14 34 28.6 +34 26 22           ~ 21 0
12 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 140 0
13 NAME Lynx Supercluster SCG ~ ~           ~ 24 1

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2021.08.02-13:43:21

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