2014MNRAS.441..203D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET10:39:30

2014MNRAS.441..203D - Mon. Not. R. Astron. Soc., 441, 203-223 (2014/June-2)

Larger sizes of massive quiescent early-type galaxies in clusters than in the field at 0.8 < z < 1.5.

DELAYE L., HUERTAS-COMPANY M., MEI S., LIDMAN C., LICITRA R., NEWMAN A., RAICHOOR A., SHANKAR F., BARRIENTOS F., BERNARDI M., CERULO P., COUCH W., DEMARCO R., MUNOZ R., SANCHEZ-JANSSEN R. and TANAKA M.

Abstract (from CDS):

We analyse the mass-size relation of ∼ 400 quiescent massive ETGs (M*/M > 3x1010) hosted by massive clusters (M200 ∼ 2-7x1014M) at 0.8 < z < 1.5, compared to those found in the field at the same epoch. Size is parametrized using the mass-normalized B-band rest-frame size, γ=R_e/M_11^0.57. We find that the γ distributions in both environments peak at the same position, but the distributions in clusters are more skewed towards larger sizes. This tail induces average sizes ∼ 30-40 percent larger for cluster galaxies than for field galaxies of similar stellar mass, while the median sizes are statistically the same with a difference of ∼ 10±10 percent. Since this size difference is not observed in the local Universe, the evolution of average galaxy size at fixed stellar mass from z ∼ 1.5 for cluster galaxies is less steep at more than 3σ (∝(1 + z)-0.53±0.04) than the evolution of field galaxies (∝(1 + z)-0.92±0.04). The difference in evolution is not measured when the median values of γ are considered: ∝(1 + z)-0.84±0.04 in the field versus ∝(1 + z)-0.71±0.05 in clusters. In our sample, the tail of large galaxies is dominated by galaxies with 3x1010 < M*/M < 1011. At this low-mass end, the difference in the average size is better explained by the accretion of new galaxies that are quenched more efficiently in clusters and/or by different morphological mixing in the cluster and field environments. If part of the size evolution would be due to mergers, the difference that we see between cluster and field galaxies could be caused by higher merger rates in clusters at higher redshift, when galaxy velocities are lower.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular - galaxies: evo-lution

VizieR on-line data: <Available at CDS (J/MNRAS/441/203): tableb1.dat>

Nomenclature: Table B1: [DHM2014] NNNN N=313 among (Nos 157-4319).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 14

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Number of rows : 14

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           ~ 243 3
2 ClG J0218-0510 ClG 02 18 21.3 -05 10 27           ~ 63 0
3 RCS J0220.9-0333 ClG 02 20 55.7 -03 33 10           ~ 13 0
4 XLSSC 046 ClG 02 23 03.0 -04 36 22           ~ 34 0
5 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1109 1
6 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1857 1
7 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2205 0
8 NAME XMMU J1229.4+0151 ClG 12 29 28.8 +01 51 34           ~ 23 0
9 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
10 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 92 0
11 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 138 0
12 ClG J2319+0038 ClG 23 19 53 +00 38.0           ~ 35 1
13 RCS J2345.4-3632 ClG 23 45 27.3 -36 32 50           ~ 13 0
14 NAME Lynx Supercluster SCG ~ ~           ~ 24 1

    Equat.    Gal    SGal    Ecl

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2021.03.03-10:39:30

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