2007MNRAS.379..190C

Query : 2007MNRAS.379..190C

2007MNRAS.379..190C - Mon. Not. R. Astron. Soc., 379, 190-200 (2007/July-3)

The observed concentration-mass relation for galaxy clusters.

COMERFORD J.M. and NATARAJAN P.

Abstract (from CDS):

The properties of clusters of galaxies offer key insights into the assembly process of structure in the universe. Numerical simulations of cosmic structure formation in a hierarchical, dark matter dominated universe suggest that galaxy cluster concentrations, which are a measure of a halo's central density, decrease gradually with virial mass. However, cluster observations have yet to confirm this correlation. The slopes of the run of measured concentrations with virial mass are often either steeper or flatter than that predicted by simulations. In this work, we present the most complete sample of observed cluster concentrations and masses yet assembled, including new measurements for 10 strong-lensing clusters, thereby more than doubling the existing number of strong-lensing concentration estimates. We fit a power law to the observed concentrations as a function of virial mass, and find that the slope is consistent with the slopes found in simulations, though our normalization factor is higher. Observed lensing concentrations appear to be systematically larger than X-ray concentrations, a more pronounced effect than that found in simulations. We also find that at a fixed mass, the bulk of observed cluster concentrations are distributed lognormally, with the exception of a few anomalously high concentration clusters. We examine the physical processes likely responsible for the discrepancy between lensing and X-ray concentrations, and for the anomalously high concentrations in particular. The forthcoming Millennium simulation results will offer the most comprehensive comparison set to our findings of an observed concentration-mass power law relation.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): gravitational lensing - galaxies: clusters: general - cosmology: observations - dark matter

Simbad objects: 114

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Number of rows : 114
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 2717 ClG 00 03 12.9 -35 56 13           ~ 146 0
2 CNOC MS 0015 100914 GiC 00 18 32.5371 +16 26 00.264           ~ 13 0
3 CNOC MS 0015 100977 GiC 00 18 33.21 +16 26 13.6           ~ 12 0
4 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
5 CNOC MS 0015 100994 BiC 00 18 33.584 +16 26 15.93           ~ 17 0
6 [MET2005] 06.646620+17.160601 GiC 00 26 35.189 +17 09 38.16         18.020 ~ 11 0
7 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
8 2MASXI J0026356+170943 BiC 00 26 35.6678 +17 09 43.090         18.115 ~ 23 0
9 [TEK2003] 0-3-79 GiC 00 26 36.0089 +17 09 45.854         17.750 ~ 14 0
10 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
11 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
12 ClG 0055-2754 ClG 00 56 56.8 -27 40 29   21.9       ~ 86 0
13 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
14 ACO 160 ClG 01 12 59.98 +15 30 05.3           ~ 181 0
15 ACO 168 ClG 01 15 07.58 +00 19 10.8           ~ 379 2
16 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 363 2
17 BAX 024.3000-09.1833 ClG 01 37 13.37 -09 11 13.6           ~ 37 0
18 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 727 1
19 ACT-CL J0159.8-0849 ClG 01 59 49.4 -08 50 00           ~ 98 0
20 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
21 SDSS J023952.72-013418.8 rG 02 39 52.732 -01 34 18.90   23.070     19.826 ~ 26 0
22 SDSS J023953.12-013455.9 rG 02 39 53.126 -01 34 55.98   24.000     20.701 ~ 28 0
23 ClG J0242-2132 ClG 02 42 35.9 -21 32 26           ~ 55 0
24 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
25 ACO 401 ClG 02 58 50.3 +13 34 07           ~ 592 0
26 ClG 0303+1658 ClG 03 05 31.6 +17 10 02     20.13     ~ 92 0
27 ACO 3112 ClG 03 17 52.9 -44 15 06           ~ 329 1
28 RX J0329.6-0211 ClG 03 29 41.6 -02 11 47           ~ 155 0
29 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 402 1
30 ACO 3158 ClG 03 43 07.5 -53 38 09           ~ 327 0
31 ACO S 400 ClG 03 55 33.29 -36 34 18.5           ~ 40 0
32 ACO 478 ClG 04 13 24.8 +10 27 52           ~ 522 0
33 ClG J0429-0253 ClG 04 29 36.0 -02 53 09           ~ 131 0
34 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
35 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
36 BAX 069.7593+05.3453 ClG 04 39 02.2 +05 20 43           ~ 82 0
37 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
38 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
39 ACO 539 ClG 05 16 35.1 +06 27 14           ~ 255 2
40 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 312 1
41 ZwCl 0735+7421 ClG 07 41 40.3 +74 14 58     17.70     ~ 273 0
42 ClG J0744+3927 ClG 07 44 52.5 +39 27 30           ~ 189 0
43 PKS 0745-19 rG 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 422 1
44 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
45 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 275 0
46 ACO 644 ClG 08 17 26.1 -07 31 13           ~ 241 0
47 ZwCl 0839+2937 ClG 08 42 55.9 +29 27 26     17.0     ~ 93 0
48 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
49 3C 220.1 BLL 09 32 39.98061600 +79 06 29.9226600   20.5       ~ 138 1
50 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
51 ClG J0947+7623 ClG 09 46 59.916 +76 23 43.99           ~ 165 0
52 NVSS J094712+762312 Rad 09 47 12.37 +76 23 09.3           ~ 151 1
53 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 137 0
54 ClG J1004+4112 ClG 10 04 34.2 +41 12 43           ~ 54 1
55 ZwCl 1006+1201 ClG 10 08 47.1 +11 47 55     18.0     ~ 75 0
56 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 155 0
57 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 414 0
58 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
59 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
60 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 232 0
61 ClG 1137+66 ClG 11 40 23.0 +66 08 16     21.0     ~ 141 0
62 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
63 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
64 ClG J1159+5531 ClG 11 59 53.02 +55 32 22.8     15.64     ~ 100 1
65 NAME NGC 4073 Group GrG 12 04 44.08 +01 48 40.9     13.53     ~ 292 0
66 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 228 0
67 ClG 1224+20 ClG 12 27 14.9 +19 51 06   19.0       ~ 96 0
68 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
69 ACO 1651 ClG 12 59 27.3 -04 10 49           ~ 307 0
70 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
71 ClG J1311-0311 ClG 13 11 01.7 -03 10 38           ~ 120 0
72 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
73 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
74 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
75 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
76 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
77 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
78 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
79 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
80 ACO 3581 ClG 14 07 29.8 -27 01 04           ~ 197 3
81 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
82 BAX 214.1083+23.2564 GrG 14 16 27.70 +23 15 25.9           ~ 65 0
83 ClG J1423+2404 ClG 14 23 47.7 +24 04 40           ~ 231 0
84 ACO 1983 ClG 14 52 59.33 +16 46 11.0           ~ 249 1
85 ACO 1991 ClG 14 54 41.53 +18 38 08.4           ~ 349 1
86 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
87 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 186 0
88 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
89 ClG J1514+3636 ClG 15 14 22.0 +36 36 22     19.0     ~ 136 0
90 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
91 ACT-CL J1521.8+0742 ClG 15 21 48.8 +07 43 41     15.13     ~ 326 0
92 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 414 2
93 BAX 233.1222+04.6817 ClG 15 32 32.02 +04 40 51.6     15.13     ~ 66 0
94 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7 17.819 ~ 155 1
95 ClG J1532+3021 ClG 15 32 53.8 +30 21 00           ~ 122 0
96 AWM 4 ClG 16 04 52.01 +23 56 26.9     14.38     ~ 141 0
97 ClG J1621+3810 ClG 16 21 25.5 +38 09 43           ~ 83 0
98 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
99 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
100 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
101 ClG J1720+3536 ClG 17 20 16.8 +35 36 27           ~ 150 1
102 ClG 1910+6736 ClG 19 10 31.2 +67 41 28     19.0     ~ 38 0
103 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1
104 ClG J1931-2635 ClG 19 31 49.6 -26 34 33           ~ 181 0
105 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
106 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 390 0
107 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
108 ClG J2229-2756 ClG 22 29 45.36 -27 55 36.5           ~ 50 0
109 ClG 2244.6-0222 ClG 22 47 12.2 -02 05 37           ~ 128 0
110 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 152 0
111 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 272 1
112 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
113 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0
114 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 400 1

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