2008MNRAS.389.1637B

Query : 2008MNRAS.389.1637B

2008MNRAS.389.1637B - Mon. Not. R. Astron. Soc., 389, 1637-1654 (2008/October-1)

Resurrecting the red from the dead: optical properties of BCGs in X-ray luminous clusters.

BILDFELL C., HOEKSTRA H., BABUL A. and MAHDAVI A.

Abstract (from CDS):

We present measurements of surface brightness and colour profiles for the brightest cluster galaxies (BCGs) in a sample of 48 X-ray luminous galaxy clusters. These data were obtained as part of the Canadian Cluster Comparison Project (CCCP). The Kormendy relation of our BCGs is steeper than that of the local ellipticals, suggesting differences in the assembly history of these types of systems. We also find that while most BCGs show monotonic colour gradients consistent with a decrease in metallicity with radius, 25 per cent of the BCGs show colour profiles that turn bluer towards the centre (blue cores). We interpret this bluing trend as evidence for recent star formation. The excess blue light leads to a typical offset from the red sequence of 0.5 to 1.0mag in (g' - r'), thus affecting optical cluster studies that may reject the BCG based on colour. All of the blue-core BCGs are located within ∼10kpc of the peak in the cluster X-ray emission. Furthermore, virtually all of the BCGs with recent star formation are in clusters that lie above the Lx-Txrelation. Based on photometry alone, these findings suggest that central star formation is a ubiquitous feature of BCGs in dynamically relaxed cool-core clusters. This implies that while active galactic nuclei (AGNs) and other heating mechanisms are effective at tempering cooling, they do not full compensate for the energy lost via radiation.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

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

Simbad objects: 51

goto Full paper

goto View the references in ADS

Number of rows : 51
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 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 502 0
2 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 635 1
3 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 186 0
4 BAX 013.9612+26.4117 ClG 00 55 50.9 +26 24 35           ~ 28 0
5 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 270 1
6 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 295 0
7 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 122 1
8 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 230 0
9 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 747 0
10 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 359 0
11 ClG 0440+02 ClG 04 43 09.7 +02 10 19     17.03     ~ 125 0
12 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 249 0
13 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 436 0
14 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 352 0
15 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 180 0
16 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 258 0
17 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 253 0
18 ACO 750 ClG 09 09 06.7 +11 01 48           ~ 99 1
19 2MASS J09134545+4056282 Sy2 09 13 45.4951283928 +40 56 28.215343572   19.69 19.21     ~ 250 2
20 ClG 0910.4+4109 ClG 09 13 46.0 +40 56 20           ~ 65 2
21 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 327 0
22 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 152 0
23 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 400 0
24 ACO 959 ClG 10 17 35.0 +59 33 28           ~ 68 0
25 ACO 1234 ClG 11 22 30.000 +21 24 22.00           ~ 38 0
26 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 106 0
27 ClG 1224+20 ClG 12 27 14.9 +19 51 06   19.0       ~ 95 0
28 ClG 1231.3+1542 ClG 12 33 55.3 +15 25 58     18.5     ~ 52 0
29 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
30 MCXC J1332.7+5032 ClG 13 32 44.8 +50 32 24           ~ 107 0
31 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 312 0
32 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 548 0
33 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 361 0
34 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 688 1
35 3C 295 Sy2 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 979 5
36 ACO 1914 ClG 14 26 03.32 +37 49 58.7           ~ 314 0
37 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 118 0
38 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 294 0
39 ClG J1514+3636 ClG 15 14 22.0 +36 36 22     19.0     ~ 136 0
40 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 180 0
41 ACO 2104 ClG 15 40 06.8 -03 17 39           ~ 107 0
42 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 562 0
43 ClG 1621+26 ClG 16 23 35.7 +26 33 50           ~ 142 0
44 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 436 0
45 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
46 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 359 0
47 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 117 0
48 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 342 0
49 CIZA J1938.3+5409 ClG 19 38 18.6 +54 09 33           ~ 36 0
50 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 688 2
51 ACO 2537 ClG 23 08 22.3 -02 11 29           ~ 137 0

To bookmark this query, right click on this link: simbad:objects in 2008MNRAS.389.1637B and select 'bookmark this link' or equivalent in the popup menu