2017A&A...604A..80M


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.09CEST11:10:29

2017A&A...604A..80M - Astronomy and Astrophysics, volume 604A, 80-80 (2017/8-1)

The faint end of the red sequence galaxy luminosity function: unveiling surface brightness selection effects with the CLASH clusters.

MARTINET N., DURRET F., ADAMI C. and RUDNICK G.

Abstract (from CDS):

Characterizing the evolution of the faint end of the cluster red sequence (RS) galaxy luminosity function (GLF) with redshift is a milestone in understanding galaxy evolution. However, the community is still divided in that respect, hesitating between an enrichment of the RS due to efficient quenching of blue galaxies from z∼1 to present-day or a scenario in which the RS is built at a higher redshift and does not evolve afterwards. Recently, it has been proposed that surface brightness (SB) selection effects could possibly solve the literature disagreement, accounting for the diminishing RS faint population in ground-based observations. We investigate this hypothesis by comparing the RS GLFs of 16 CLASH clusters computed independently from ground-based Subaru/Suprime-Cam V and Ip or Ic images and space-based HST/ACS F606W and F814W images in the redshift range 0.187≤z≤0.686. We stack individual cluster GLFs in two redshift bins (0.187≤z≤0.399 and 0.400≤z≤0.686) and two mass (6x1014M≤M200<1015M and 1015M≤M200) bins, and also measure the evolution with the enclosing radius from 0.5 Mpc up to the virial radius for the Subaru large field of view data. Finally, we simulate the low-redshift clusters at higher redshift to investigate SB dimming effects. We find similar RS GLFs for space- and ground-based data, with a difference of 0.2σ in the faint end parameter α when stacking all clusters together and a maximum difference of 0.9σ in the case of the high-redshift stack, demonstrating a weak dependence on the type of observation in the probed range of redshift and mass. When considering the full sample, we estimate α=-0.76±0.07 and α=-0.78±0.06 with HST and Subaru, respectively. We note a mild variation of the faint end between the high- and low-redshift subsamples at a 1.7σ and 2.6σ significance. We investigate the effect of SB dimming by simulating our low-redshift galaxies at high redshift. We measure an evolution in the faint end slope of less than 1σ in this case, implying that the observed signature is larger than one would expect from SB dimming alone, and indicating a true evolution in the faint end slope. Finally, we find no variation with mass or radius in the probed range of these two parameters. We therefore conclude that quenching is mildly affecting cluster galaxies at z≤0.7 leading to a small enrichment of the RS until today, and that the different faint end slopes observed in the literature are probably due to specific cluster-to-cluster variation.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: clusters: general - galaxies: luminosity function, mass function - galaxies: evolution - galaxies: formation - galaxies: formation

Simbad objects: 18

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Number of rows : 18

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 ACO 209 ClG 01 31 57.5 -13 34 35           ~ 257 0
2 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 310 0
3 ClG J0329-0212 ClG 03 29 41.6 -02 11 47           ~ 114 0
4 ClG J0429-0253 ClG 04 29 36.0 -02 53 09           ~ 101 0
5 MACSg J071731.92+374512.6 G 07 17 31.921 +37 45 12.61           ~ 6 0
6 ClG J0744+3927 ClG 07 44 52.5 +39 27 30           ~ 165 0
7 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 232 0
8 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2272 0
9 MCS J1115.8+0129 ClG 11 15 52.1 +01 29 53           ~ 107 0
10 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 192 0
11 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 488 0
12 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 350 0
13 ClG J1423+2404 ClG 14 23 47.7 +24 04 40           ~ 182 0
14 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7   ~ 135 0
15 ClG J1720+3536 ClG 17 20 16.8 +35 36 27           ~ 120 1
16 ClG J2129-0741 ClG 21 29 26.0 -07 41 28           ~ 142 0
17 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 225 0
18 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 353 0

    Equat.    Gal    SGal    Ecl

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2021.05.09-11:10:29

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