2010MNRAS.409..169S

Query : 2010MNRAS.409..169S

2010MNRAS.409..169S - Mon. Not. R. Astron. Soc., 409, 169-183 (2010/November-3)

LoCuSS: connecting the dominance and shape of brightest cluster galaxies with the assembly history of massive clusters.

SMITH G.P., KHOSROSHAHI H.G., DARIUSH A., SANDERSON A.J.R., PONMAN T.J., STOTT J.P., HAINES C.P., EGAMI E. and STARK D.P.

Abstract (from CDS):

We study the luminosity gap, Δm12, between the first- and second-ranked galaxies in a sample of 59 massive (∼1015M☉) galaxy clusters, using data from the Hale Telescope, the Hubble Space Telescope, Chandra and Spitzer. We find that the Δm12distribution, p(Δm12), is a declining function of Δm12 to which we fitted a straight line: p(Δm12) ∝ -(0.13±0.02)Δm12. The fraction of clusters with `large' luminosity gaps is p(Δm12≥ 1) = 0.37 ±0.08, which represents a 3σ excess over that obtained from Monte Carlo simulations of a Schechter function that matches the mean cluster galaxy luminosity function. We also identify four clusters with `extreme' luminosity gaps, Δm12≥ 2, giving a fraction of. More generally, large luminosity gap clusters are relatively homogeneous, with elliptical/discy brightest cluster galaxies (BCGs), cuspy gas density profiles (i.e. strong cool cores), high concentrations and low substructure fractions. In contrast, small luminosity gap clusters are heterogeneous, spanning the full range of boxy/elliptical/discy BCG morphologies, the full range of cool core strengths and dark matter concentrations, and have large substructure fractions. Taken together, these results imply that the amplitude of the luminosity gap is a function of both the formation epoch and the recent infall history of the cluster. `BCG dominance' is therefore a phase that a cluster may evolve through and is not an evolutionary `cul-de-sac'. We also compare our results with semi-analytic model predictions based on the Millennium Simulation. None of the models is able to reproduce all of the observational results on Δm12, underlining the inability of the current generation of models to match the empirical properties of BCGs. We identify the strength of active galactic nucleus feedback and the efficiency with which cluster galaxies are replenished after they merge with the BCG in each model as possible causes of these discrepancies.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): gravitational lensing: strong - galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: haloes - X-rays: galaxies

Simbad objects: 63

goto Full paper

goto View the references in ADS

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 68 ClG 00 37 06.2 +09 09 33           ~ 186 0
2 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 270 1
3 ACO 141 ClG 01 05 37.183 -24 40 49.95           ~ 79 0
4 ZwCl 0104+0048 ClG 01 06 50.5 +01 04 10           ~ 61 0
5 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 295 0
6 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 229 0
7 ACO 291 ClG 02 01 42.9 -02 11 48           ~ 66 0
8 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 359 0
9 ACT-CL J0331.1-2100 ClG 03 31 06.0 -21 00 34           ~ 29 0
10 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 249 0
11 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 180 0
12 ClG J0743+1733 ClG 07 43 23.16 +17 33 40.0           ~ 7 0
13 ZwCl 0748+1744 ClG 07 51 23.8 +17 31 15           ~ 16 0
14 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 258 0
15 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 437 0
16 ZwCl 0839+2937 ClG 08 42 55.9 +29 27 52     17.0     ~ 86 0
17 ZwCl 0857+2107 ClG 09 00 36.90 +20 53 40.3           ~ 93 0
18 ACO 750 ClG 09 09 06.7 +11 01 48           ~ 99 1
19 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 295 0
20 ZwCl 0923+5340 ClG 09 27 10.8 +53 27 00           ~ 16 0
21 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 135 0
22 ACO 901 ClG 09 56 09.7 -09 56 17           ~ 107 1
23 BAX 150.1046+44.1539 ClG 10 00 17.91 +44 08 35.8           ~ 37 0
24 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 400 0
25 ACO 1201 ClG 11 12 54.4 +13 26 08           ~ 115 1
26 ACO 1204 ClG 11 13 32.2 +17 35 40           ~ 94 0
27 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 106 0
28 ACO 1423 ClG 11 57 17.3206 +33 36 39.364           ~ 168 0
29 ACO 1553 ClG 12 30 48.000 +10 33 21.60           ~ 82 0
30 ZwCl 1231+1007 ClG 12 34 21.9 +09 47 02           ~ 66 0
31 ACO 1634 ClG 12 53 59 -06 41.3           ~ 11 0
32 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 141 1
33 ZwCl 1309+2216 ClG 13 11.5 +22 00           ~ 23 0
34 ACO 1704 ClG 13 14 24.5 +64 34 40           ~ 60 0
35 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 251 2
36 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 312 0
37 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 688 1
38 BAX 214.1083+23.2564 GrG 14 16 27.70 +23 15 25.9           ~ 62 0
39 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
40 ACO 1961 ClG 14 44 31.7 +31 13 36           ~ 51 0
41 ACO 1994 ClG 14 56 27.0137 -05 49 03.521           ~ 14 0
42 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 294 0
43 ACO 2009 ClG 15 00 15.2 +21 22 09           ~ 101 0
44 ZwCl 1459+4240 ClG 15 01 23.0 +42 20 47           ~ 56 0
45 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 180 0
46 BAX 238.0513+20.2292 ClG 15 52 12.3 +20 13 42           ~ 44 0
47 ACO 2146 ClG 15 56 04.7 +66 20 24           ~ 176 0
48 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 562 0
49 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 436 0
50 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
51 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 359 0
52 ACO 2254 ClG 17 17 45.90 +19 40 22.8           ~ 69 0
53 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 255 0
54 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 342 0
55 ACT-CL J2102.1-2431 ClG 21 02 10.1 -24 31 57           ~ 38 0
56 ACO 2345 ClG 21 27 05.391 -12 09 07.41           ~ 131 0
57 NVSS J212709-120958 Rad 21 27 09.5 -12 09 58           ~ 132 1
58 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 270 0
59 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 688 2
60 ACT-CL J2211.7-0349 ClG 22 11 43.4 -03 50 07           ~ 78 0
61 ACO 2485 ClG 22 48 33 -16 07.1           ~ 48 0
62 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 137 0
63 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 170 0

To bookmark this query, right click on this link: simbad:objects in 2010MNRAS.409..169S and select 'bookmark this link' or equivalent in the popup menu