2006ApJ...647..922E

Query : 2006ApJ...647..922E

2006ApJ...647..922E - Astrophys. J., 647, 922-933 (2006/August-3)

Spitzer observations of the brightest galaxies in X-ray-luminous clusters.

EGAMI E., MISSELT K.A., RIEKE G.H., WISE M.W., NEUGEBAUER G., KNEIB J.-P., LE FLOC'H E., SMITH G.P., BLAYLOCK M., DOLE H., FRAYER D.T., HUANG J.-S., KRAUSE O., PAPOVICH C., PEREZ-GONZALEZ P.G. and RIGBY J.R.

Abstract (from CDS):

We have studied the infrared properties of the brightest cluster galaxies (BCGs) located in the cores of X-ray-luminous clusters at 0.15<z<0.35. The majority of the BCGs are not particularly infrared-luminous compared with other massive early-type galaxies, suggesting that the cluster environment has little influence on the infrared luminosities of the BCGs. The exceptions, however, are the BCGs in the three X-ray-brightest clusters in the sample, A1835, Z3146, and A2390. These BCGs have a prominent far-infrared peak in their spectral energy distributions (SEDs), and two of them (those in A1835 and Z3146) can be classified as luminous infrared galaxies (LIRGs: LIR>1011 L☉). Although radio AGNs (active galactic nuclei) are found to be prevalent among the BCGs, the infrared luminosities of these three BCGs, judged from the infrared SED signatures, are likely to be powered by star formation. Considering the overall trend that clusters with shorter radiative gas cooling times harbor more infrared-luminous BCGs, the enhanced star formation may be caused by the cooling cluster gas accreting onto the BCGs.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Active - Galaxies: Clusters: General - Galaxies: Elliptical and Lenticular, cD - Infrared: Galaxies

Nomenclature: Table 1, col(2,4): [EMR2006] JHHMMSS.s+DDMMSS N=11.

Simbad objects: 24

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Number of rows : 24
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 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
2 2MASX J09175344+5143379 BiC 09 17 53.418 +51 43 37.35   18.1   16.49   ~ 17 1
3 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
4 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
5 NVSS J102339+041115 rG 10 23 39.634 +04 11 10.66   18.6       ~ 30 0
6 SDSS J135950.56+623105.3 rG 13 59 50.571 +62 31 05.16   19.94 19.05 17.80 17.11 ~ 28 2
7 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
8 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
9 NAME SMM J14010+0252 Sy1 14 01 02.0819944848 +02 52 42.426538140   19.3       ~ 47 2
10 NVSS J145715+222036 rG 14 57 15.0998550864 +22 20 34.320909444   18.5   16.82   ~ 25 1
11 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
12 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
13 LEDA 140648 BiC 16 35 49.1 +66 12 40   17.5       ~ 24 1
14 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
15 2MASX J16401981+4642409 BiC 16 40 19.812 +46 42 40.94   19.9       ~ 20 1
16 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
17 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
18 NVSS J172227+320757 rG 17 22 27.185 +32 07 57.25           ~ 47 1
19 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 390 0
20 [TVS2020] MS2137 50597 BLL 21 40 15.176 -23 39 39.88       16.7   ~ 19 1
21 NAME SMM J21536+1741 BiC 21 53 36.82670 +17 41 43.7260     19.58     ~ 49 2
22 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
23 2dFGRS TGS537Z142 BiC 22 58 48.413 -34 48 08.73   19.64 18.08 16.90 16.09 ~ 11 1
24 ACO S 1077 ClG 22 58 52.34 -34 46 54.6           ~ 198 0

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