2009ApJ...697..436H


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:01:30

2009ApJ...697..436H - Astrophys. J., 697, 436-451 (2009/May-3)

The XMM cluster survey: galaxy morphologies and the color-magnitude relation in XMMXCS J2215.9-1738 at z = 1.46.

HILTON M., STANFORD S.A., STOTT J.P., COLLINS C.A., HOYLE B., DAVIDSON M., HOSMER M., KAY S.T., LIDDLE A.R., LLOYD-DAVIES E., MANN R.G., MEHRTENS N., MILLER C.J., NICHOL R.C., ROMER A.K., SABIRLI K., SAHLEN M., VIANA P.T.P., WEST M.J., BARBARY K., DAWSON K.S., MEYERS J., PERLMUTTER S., RUBIN D. and SUZUKI N.

Abstract (from CDS):

We present a study of the morphological fractions and color-magnitude relation (CMR) in the most distant X-ray selected galaxy cluster currently known, XMMXCS J2215.9-1738 at z = 1.46, using a combination of optical imaging data obtained with the Hubble Space Telescope Advanced Camera for Surveys, and infrared data from the Multi-Object Infrared Camera and Spectrograph, mounted on the 8.2 m Subaru telescope. We find that the morphological mix of the cluster galaxy population is similar to clusters at z ∼ 1. Within the central 0.5 Mpc, approximately ∼62% of the galaxies identified as likely cluster members are ellipticals or S0s; and ∼38% are spirals or irregulars. Therefore, early-type galaxies were already entrenched as the dominant galaxy population in at least some clusters approximately ∼4.5 Gyr after the big bang. We measure the CMRs for the early-type galaxies, finding that the slope in the z850-J relation is consistent with that measured in the Coma cluster, some ∼9 Gyr earlier, although the uncertainty is large. In contrast, the measured intrinsic scatter about the CMR is more than three times the value measured in Coma, after conversion to rest-frame U - V. From comparison with stellar population synthesis models, the intrinsic scatter measurements imply mean luminosity-weighted ages for the early-type galaxies in J2215.9-1738 of ~3 Gyr, corresponding to the major epoch of star formation coming to an end at zf~ 3-5. We find that the cluster exhibits evidence of the "downsizing" phenomenon: the fraction of faint cluster members on the red sequence expressed using the Dwarf-to-Giant Ratio (DGR) is 0.32 ± 0.18 within a radius of 0.5R200. This is consistent with extrapolation of the redshift evolution of the DGR seen in cluster samples at z < 1. In contrast to observations of some other z > 1 clusters, we find a lack of very bright galaxies within the cluster.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: XMMXCS J2215.9-1738 - galaxies: elliptical and lenticular, cD - galaxies: evolution - X-rays: galaxies: clusters

Nomenclature: Table 1: [HSS2009b] NNNN N=64 among (Nos 8-1243).

Simbad objects: 74

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Number of rows : 74

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 SpARCS J003550-431224 ClG 00 35 50.0 -43 12 24           ~ 21 0
2 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 243 3
3 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1343 0
4 NAME Lynx reg 08 47 +44.6           ~ 57 0
5 ClG J0910+5422 ClG 09 10 44.9 +54 22 09           ~ 87 0
6 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 450 0
7 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
8 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4319 2
9 [HSS2009b] 1149 GiC 22 15 54.000 -17 39 01.65         23.19 ~ 2 0
10 [HSS2009b] 1080 G 22 15 54.288 -17 38 48.22           ~ 1 0
11 [HSS2009b] 1118 G 22 15 54.624 -17 38 55.06           ~ 2 0
12 [HSS2009b] 798 G 22 15 55.200 -17 38 04.16           ~ 1 0
13 [HSS2009b] 538 GiC 22 15 55.200 -17 37 22.36         23.65 ~ 2 0
14 [HSS2009b] 723 GiC 22 15 56.016 -17 37 55.05         24.41 ~ 2 0
15 [BMC2017] XMM2215 710 G 22 15 56.064 -17 38 20.66           ~ 2 0
16 [HSS2009b] 96 GiC 22 15 56.160 -17 36 37.80         24.98 ~ 2 0
17 [BMC2017] XMM2215 1006 GiC 22 15 56.196 -17 37 49.93         23.64 ~ 4 0
18 [HSS2009b] 610 G 22 15 56.304 -17 37 37.99           ~ 1 1
19 [HSS2009b] 526 GiC 22 15 56.544 -17 37 21.36         23.67 ~ 2 0
20 [HSS2009b] 715 G 22 15 56.712 -17 37 53.07           ~ 1 0
21 [HSS2009b] 529 G 22 15 56.808 -17 37 21.90           ~ 2 0
22 SSTU J221556.92-173804.7 GiC 22 15 56.928 -17 38 04.70         23.03 ~ 2 0
23 [HSS2009b] 303 G 22 15 56.976 -17 36 54.18           ~ 1 0
24 [HCS2007] 11 GiC 22 15 57.192 -17 38 07.80         23.24 ~ 3 0
25 [HLS2010] 35 GiC 22 15 57.23 -17 37 53.2   25.15     23.78 ~ 11 0
26 [HCS2007] 9 GiC 22 15 57.432 -17 37 57.90           ~ 3 0
27 [HSS2009b] 653 GiC 22 15 57.720 -17 37 45.55         24.17 ~ 2 0
28 [HSS2009b] 878 G 22 15 57.864 -17 38 18.70           ~ 1 0
29 [HSS2009b] 771 G 22 15 57.864 -17 38 02.11           ~ 1 0
30 [HSS2009b] 683 G 22 15 57.864 -17 37 48.61           ~ 1 0
31 [HSS2009b] 875 G 22 15 58.008 -17 38 18.13           ~ 1 0
32 [HSS2009b] 789 GiC 22 15 58.056 -17 38 04.59           ~ 2 0
33 [HSS2009b] 899 G 22 15 58.224 -17 38 22.12           ~ 2 0
34 [HCS2007] 14 GiC 22 15 58.344 -17 37 37.30         24.11 ~ 4 0
35 [HSS2009b] 803 G 22 15 58.368 -17 38 06.46           ~ 1 0
36 [HSS2009b] 713 G 22 15 58.392 -17 37 53.68           ~ 1 0
37 [HCS2007] 1 GiC 22 15 58.464 -17 37 58.58         23.24 ~ 4 0
38 [BFT2010] 333.9937-17.6362 GiC 22 15 58.5 -17 38 10         23.53 ~ 6 1
39 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 92 0
40 [HLS2010] PS2 GiC 22 15 58.848 -17 38 09.85         22.75 ~ 3 0
41 [HCS2007] 2 GiC 22 15 58.872 -17 37 59.26         23.49 ~ 4 0
42 [BMC2017] XMM2215 864 GiC 22 15 59.047 -17 38 02.62         23.34 ~ 5 0
43 [HSS2009b] 614 G 22 15 59.064 -17 37 37.95           ~ 1 0
44 [HSS2009b] 745 G 22 15 59.088 -17 37 58.54           ~ 1 0
45 [HLS2010] PS1 GiC 22 15 59.136 -17 37 54.22         24.36 ~ 3 0
46 [HSS2009b] 823 GiC 22 15 59.376 -17 38 09.88         24.56 ~ 2 0
47 [HCS2007] 18 GiC 22 15 59.472 -17 38 37.39         23.09 ~ 3 0
48 [HSS2009b] 792 G 22 15 59.544 -17 38 05.24           ~ 1 0
49 [HSS2009b] 747 G 22 15 59.688 -17 37 59.70           ~ 1 0
50 [HSS2009b] 1243 G 22 15 59.808 -17 39 18.21           ~ 1 0
51 [HSS2009b] 500 G 22 15 59.808 -17 37 17.54           ~ 1 0
52 [HSS2009b] 749 G 22 15 59.832 -17 38 00.45           ~ 1 0
53 [BMC2017] XMM2215 912 GiC 22 15 59.884 -17 37 59.29           ~ 3 0
54 [HSS2009b] 1047 GiC 22 16 00.096 -17 38 42.61         23.57 ~ 2 1
55 [HSS2009b] 591 GiC 22 16 00.096 -17 37 33.92           ~ 2 0
56 [HSS2009b] 853 G 22 16 00.216 -17 38 15.43           ~ 1 0
57 SSTU J221600.38-173750.5 GiC 22 16 00.384 -17 37 50.59         23.52 ~ 2 0
58 [HSS2009b] 643 G 22 16 00.384 -17 37 42.74           ~ 1 0
59 [HSS2009b] 982 G 22 16 00.408 -17 38 32.42           ~ 1 0
60 [HSS2009b] 1004 G 22 16 00.576 -17 38 36.42           ~ 1 0
61 [HCS2007] 15 GiC 22 16 00.648 -17 37 51.67         23.66 ~ 3 1
62 [HSS2009b] 9 G 22 16 00.839 -17 39 31.96           ~ 1 0
63 [HSS2009b] 872 G 22 16 00.936 -17 38 18.20           ~ 1 0
64 [HSS2009b] 8 G 22 16 01.776 -17 39 32.04           ~ 1 0
65 [HSS2009b] 939 G 22 16 01.896 -17 38 27.09           ~ 1 0
66 [HSS2009b] 1201 G 22 16 03.168 -17 39 11.05           ~ 1 0
67 [BMC2017] XMM2215 615 GiC 22 16 03.176 -17 38 29.67           ~ 3 0
68 [HSS2009b] 697 GiC 22 16 03.432 -17 37 51.24         24.11 ~ 2 0
69 [HSS2009b] 1028 G 22 16 03.720 -17 38 38.68           ~ 1 0
70 [HSS2009b] 450 G 22 16 03.816 -17 37 10.38           ~ 1 0
71 [HSS2009b] 858 GiC 22 16 05.400 -17 38 17.48           ~ 3 0
72 [HSS2009b] 850 G 22 16 05.448 -17 38 14.85           ~ 1 0
73 [HSS2009b] 539 G 22 16 05.592 -17 37 22.51           ~ 1 0
74 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 138 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-18:01:30

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