2012MNRAS.425..204B

Query : 2012MNRAS.425..204B

2012MNRAS.425..204B - Mon. Not. R. Astron. Soc., 425, 204-221 (2012/September-1)

Evolution of the red sequence giant to dwarf ratio in galaxy clusters out to z ∼ 0.5.

BILDFELL C., HOEKSTRA H., BABUL A., SAND D., GRAHAM M., WILLIS J., URQUHART S., MAHDAVI A., PRITCHET C., ZARITSKY D., FRANSE J. and LANGELAAN P.

Abstract (from CDS):

We analyse deep g' and r' band data of 97 galaxy clusters imaged with MegaCam on the Canada–France–Hawaii telescope. We compute the number of luminous (giant) and faint (dwarf) galaxies using criteria based on the definitions of de Lucia et al. Due to excellent image quality and uniformity of the data and analysis, we probe the giant-to-dwarf ratio (GDR) out to z ∼ 0.55. With X-ray temperature (Tx) information for the majority of our clusters, we constrain, for the first time, the Tx-corrected giant and dwarf evolution separately. Our measurements support an evolving GDR over the redshift range 0.05 ≤ z ≤ 0.55. We show that modifying the (g' - r'), \mi m\mi r\mo ' and K-correction used to define dwarf and giant selection does not alter the conclusion regarding the presence of evolution. We parametrize the GDR evolution using a linear function of redshift (\mi GDRalpha\mi z=+beta) with a best-fitting slope of α = 0.88±0.15 and normalization β = 0.44±0.03. Contrary to claims of a large intrinsic scatter, we find that the GDR data can be fully accounted for using observational errors alone. Consistently, we find no evidence for a correlation between GDR and cluster mass (via Tx or weak lensing). Finally, the data suggest that the evolution of the GDR at z < 0.2 is driven primarily by dry merging of the massive giant galaxies, which when considered with previous results at higher redshift, suggests a change in the dominant mechanism that mediates the GDR.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS

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

Simbad objects: 102

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Number of rows : 102
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 2703 ClG 00 05 29.30 +16 12 23.5           ~ 54 0
2 ACO 7 ClG 00 11 43.134 +32 24 46.55           ~ 82 0
3 NVSS J001145+322542 Rad 00 11 46.3 +32 25 46           ~ 67 1
4 ACO 21 ClG 00 20 38.75 +28 41 40.5           ~ 122 0
5 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
6 ACO 98 ClG 00 46 29.2 +20 28 06           ~ 150 0
7 BAX 013.9612+26.4117 ClG 00 55 50.9 +26 24 35           ~ 29 0
8 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
9 2E 0053.2+2604 ClG 00 55 59.4 +26 20 13           ~ 25 0
10 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
11 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
12 2MAXI J0134-082 ClG 01 32 41.1 -08 04 06           ~ 21 0
13 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 135 1
14 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
15 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 420 0
16 ACO 401 ClG 02 58 50.3 +13 34 07           ~ 592 0
17 BAX 058.2454+19.6830 ClG 03 52 58.9 +19 40 58           ~ 39 0
18 ACO 478 ClG 04 13 24.8 +10 27 52           ~ 522 0
19 ClG 0440+02 ClG 04 43 09.7 +02 10 19     17.03     ~ 129 0
20 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
21 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
22 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
23 ACO 545 ClG 05 32 24.4152 -11 32 35.080           ~ 102 0
24 ACO 553 ClG 06 12 25.8 +48 37 26           ~ 49 0
25 ZwCl 0628+2502 ClG 06 31 21.4 +25 00 58           ~ 24 0
26 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 196 0
27 SDSSCGB 761 CGG 07 36 37.2 +39 24 48           ~ 3 0
28 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 275 0
29 ACO 644 ClG 08 17 26.1 -07 31 13           ~ 241 0
30 ACO 646 ClG 08 22 10.0 +47 05 58           ~ 102 1
31 ACO 655 ClG 08 25 16.12 +47 09 34.2           ~ 118 0
32 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
33 MCXC J0856.1+3756 ClG 08 56 13.7 +37 56 08           ~ 20 0
34 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
35 ACO 763 ClG 09 12 29.8 +15 56 35           ~ 45 0
36 RXC J0913.7+4056 ClG 09 13 46.0 +40 56 20           ~ 71 0
37 ACO 780 ClG 09 18 30 -12 15.7           ~ 469 0
38 ACO 795 ClG 09 24 11.26 +14 09 03.5           ~ 120 0
39 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
40 ClG J1003+3253 ClG 10 03 04.1 +32 54 28           ~ 34 0
41 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 155 0
42 ACO 961 ClG 10 16 39.24 +33 39 44.4           ~ 61 0
43 ACO 959 ClG 10 17 35.0 +59 33 28           ~ 76 0
44 ACO 990 ClG 10 23 39.46 +49 08 19.6           ~ 88 0
45 ZwCl 1023+1257 ClG 10 25 55.9 +12 41 07           ~ 54 0
46 ACO 1033 ClG 10 31 39.78 +35 05 34.4           ~ 97 0
47 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 232 0
48 ACO 1132 ClG 10 58 32.05 +56 47 14.2           ~ 145 1
49 ACO 1234 ClG 11 22 30.000 +21 24 22.00           ~ 39 0
50 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 118 0
51 ACO 1285 ClG 11 30 25.4 -14 33 33           ~ 66 0
52 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 70 0
53 ACO 1361 ClG 11 43 45.85 +46 20 51.8           ~ 96 0
54 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
55 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 286 0
56 ZwCl 1215+0400 ClG 12 17 43.62 +03 38 51.5           ~ 169 0
57 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 325 0
58 ACO 1651 ClG 12 59 27.3 -04 10 49           ~ 307 0
59 MCXC J1332.7+5032 ClG 13 32 44.8 +50 32 24           ~ 134 0
60 ACO 1781 ClG 13 45 32.70 +29 31 49.6           ~ 67 0
61 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
62 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
63 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
64 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
65 ACO 1882 ClG 14 14 24.02 -00 22 39.9           ~ 47 0
66 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
67 ACO 1927 ClG 14 31 06.80 +25 38 01.3           ~ 103 0
68 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 122 0
69 ACO 1991 ClG 14 54 41.53 +18 38 08.4           ~ 349 1
70 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
71 ACO 2033 ClG 15 11 23.50 +06 19 08.4           ~ 110 0
72 ACO 2050 ClG 15 16 18.7 +00 05 31           ~ 122 0
73 ACO 2055 ClG 15 18 46.29 +06 13 42.9           ~ 113 0
74 ACO 2064 ClG 15 20 59.4 +48 38 17           ~ 53 0
75 ACT-CL J1521.8+0742 ClG 15 21 48.8 +07 43 41     15.13     ~ 326 0
76 ACO 2065 ClG 15 22 22.7 +27 44 20           ~ 398 0
77 ACO 2069 ClG 15 24 02.92 +29 53 20.3           ~ 165 0
78 ClG J1524+0957 ClG 15 24 40.3 +09 57 35           ~ 64 0
79 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 188 0
80 ACO 2104 ClG 15 40 06.8 -03 17 39           ~ 113 0
81 ACO 2125 ClG 15 41 14.1 +66 15 57           ~ 124 1
82 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
83 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
84 ClG 1621+26 ClG 16 23 35.7 +26 33 50           ~ 145 0
85 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
86 ClG J1701+6414 ClG 17 01 22.6 +64 14 09           ~ 78 0
87 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 131 0
88 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
89 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1
90 CIZA J1938.3+5409 ClG 19 38 18.6 +54 09 33           ~ 42 0
91 ACO 2409 ClG 22 00 52.7 +20 58 27           ~ 101 0
92 ACO 2420 ClG 22 10 22.5 -12 11 13           ~ 126 0
93 ACO 2426 ClG 22 14 27.3 -10 22 05           ~ 91 0
94 ACO 2440 ClG 22 23 52.6 -01 35 47           ~ 137 1
95 ACO 2443 ClG 22 26 14.09 +17 25 13.5           ~ 126 0
96 BAX 337.1433+20.6131 ClG 22 28 32.6 +20 37 08           ~ 132 0
97 ACO 2495 ClG 22 50 17.10 +10 55 01.2           ~ 87 0
98 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 152 0
99 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
100 ACO 2627 ClG 23 36 42.4 +23 54 44           ~ 48 0
101 ACT-CL J2344.3-0422 ClG 23 44 15.98 -04 22 24.5           ~ 53 0
102 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 364 0

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