2015A&A...577A..19V

Query : 2015A&A...577A..19V

2015A&A...577A..19V - Astronomy and Astrophysics, volume 577A, 19-19 (2015/5-1)

Evidence for the inside-out growth of the stellar mass distribution in galaxy clusters since z ∼ 1.

VAN DER BURG R.F.J., HOEKSTRA H., MUZZIN A., SIFON C., BALOGH M.L. and McGEE S.L.

Abstract (from CDS):

We study the radial number density and stellar mass density distributions of satellite galaxies in a sample of 60 massive clusters at 0.04<z<0.26 selected from the Multi-Epoch Nearby Cluster Survey (MENeaCS) and the Canadian Cluster Comparison Project (CCCP). In addition to ∼10000 spectroscopically confirmed member galaxies, we use deep ugri-band imaging to estimate photometric redshifts and stellar masses, and then statistically subtract fore- and background sources using data from the COSMOS survey. We measure the galaxy number density and stellar mass density distributions in logarithmically spaced bins over 2 orders of magnitude in radial distance from the BCGs. For projected distances in the range 0.1<R/R200<2.0, we find that the stellar mass distribution is well-described by an NFW profile with a concentration of c=2.03±0.20. However, at smaller radii we measure a significant excess in the stellar mass in satellite galaxies of about 1011M☉ per cluster, compared to these NFW profiles. We do obtain good fits to generalised NFW profiles with free inner slopes and to Einasto profiles. To examine how clusters assemble their stellar mass component over cosmic time, we compare this local sample to the GCLASS cluster sample at z∼1, which represents the approximate progenitor sample of the low-z clusters. This allows for a direct comparison, which suggests that the central parts (R<0.4Mpc) of the stellar mass distributions of satellites in local galaxy clusters are already in place at z∼1, and contain sufficient excess material for further BCG growth. Evolving towards z=0, clusters appear to assemble their stellar mass primarily onto the outskirts, making them grow in an inside-out fashion.

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Journal keyword(s): galaxies: clusters: general - galaxies: evolution - galaxies: photometry

Simbad objects: 63

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Number of rows : 63
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 2703 ClG 00 05 29.30 +16 12 23.5           ~ 52 0
2 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
3 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 270 1
4 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 555 2
5 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 368 1
6 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 122 1
7 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 396 0
8 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 566 0
9 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2259 1
10 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 249 0
11 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 436 0
12 ACO 545 ClG 05 32 24.4152 -11 32 35.080           ~ 97 0
13 ACO 553 ClG 06 12 25.8 +48 37 26           ~ 47 0
14 ZwCl 0628+2502 ClG 06 31 21.4 +25 00 58           ~ 23 0
15 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 180 0
16 MCXC J0736.4+3925 ClG 07 36 10.12 +39 29 09.9           ~ 35 1
17 ACO 644 ClG 08 17 24.5 -07 30 46           ~ 225 0
18 ACO 646 ClG 08 22 10.0 +47 05 58           ~ 99 1
19 ACO 655 ClG 08 25 16.12 +47 09 34.2           ~ 107 0
20 ACO 780 ClG 09 18 30 -12 15.7           ~ 453 0
21 ACO 795 ClG 09 24 11.26 +14 09 03.5           ~ 103 0
22 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2975 0
23 ACO 961 ClG 10 16 39.24 +33 39 44.4           ~ 49 0
24 ACO 990 ClG 10 23 39.46 +49 08 19.6           ~ 79 0
25 ZwCl 1023+1257 ClG 10 25 55.9 +12 41 07           ~ 48 0
26 ACO 1033 ClG 10 31 39.78 +35 05 34.4           ~ 82 0
27 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 214 0
28 ACO 1132 ClG 10 58 32.05 +56 47 14.2           ~ 129 1
29 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 106 0
30 ACO 1285 ClG 11 30 25.4 -14 33 33           ~ 60 0
31 ACO 1361 ClG 11 43 45.85 +46 20 51.8           ~ 92 0
32 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 430 0
33 ZwCl 1215+0400 ClG 12 17 43.62 +03 38 51.5           ~ 153 0
34 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 304 0
35 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 290 0
36 ACO 1781 ClG 13 45 32.70 +29 31 49.6           ~ 66 0
37 ACO 1795 ClG 13 48 50.48 +26 35 07.4           ~ 1267 0
38 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 689 1
39 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
40 ACO 1927 ClG 14 31 06.80 +25 38 01.3           ~ 99 0
41 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 118 0
42 ACO 1991 ClG 14 54 41.53 +18 38 08.4           ~ 330 1
43 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
44 ACO 2033 ClG 15 11 23.50 +06 19 08.4           ~ 93 0
45 ACO 2050 ClG 15 16 18.7 +00 05 31           ~ 113 0
46 ACO 2055 ClG 15 18 46.29 +06 13 42.9           ~ 107 0
47 ACO 2064 ClG 15 20 59.4 +48 38 17           ~ 50 0
48 ACT-CL J1521.8+0742 ClG 15 21 55.14 +07 41 27.2     15.13     ~ 311 0
49 ACO 2065 ClG 15 22 29.3 +27 42 22           ~ 374 0
50 ACO 2069 ClG 15 24 02.92 +29 53 20.3           ~ 143 0
51 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 180 0
52 ACO 2104 ClG 15 40 06.8 -03 17 39           ~ 107 0
53 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 768 0
54 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 563 0
55 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 436 0
56 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 117 0
57 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 342 0
58 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 461 1
59 ACO 2409 ClG 22 00 52.7 +20 58 27           ~ 84 0
60 ACO 2440 ClG 22 23 52.6 -01 35 47           ~ 125 1
61 ACO 2495 ClG 22 50 17.10 +10 55 01.2           ~ 77 0
62 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 539 0
63 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 352 0

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