2010ApJ...719.1844H

Query : 2010ApJ...719.1844H

2010ApJ...719.1844H - Astrophys. J., 719, 1844-1858 (2010/August-3)

Detecting star formation in brightest cluster galaxies with GALEX.

HICKS A.K., MUSHOTZKY R. and DONAHUE M.

Abstract (from CDS):

We present the results of GALEX observations of 17 cool core (CC) clusters of galaxies. We show that GALEX is easily capable of detecting star formation in brightest cluster galaxies (BCGs) out to z ≥ 0.45 and 50-100 kpc. In most of the CC clusters studied, we find significant UV luminosity excesses and colors that strongly suggest recent and/or current star formation. The BCGs are found to have blue UV colors in the center which become increasingly redder with radius, indicating that the UV signature of star formation is most easily detected in the central regions. Our findings show good agreement between UV star formation rates and estimates based on Hα observations. IR observations coupled with our data indicate moderate-to-high dust attenuation. Comparisons between our UV results and the X-ray properties of our sample suggest clear correlations between UV excess, cluster entropy, and central cooling time, confirming that star formation is directly and incontrovertibly related to the cooling gas.

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Journal keyword(s): galaxies: clusters: general - galaxies: clusters: intracluster medium - galaxies: elliptical and lenticular, cD - galaxies: stellar content - stars: formation - ultraviolet: galaxies - X-rays: galaxies: clusters

Simbad objects: 42

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Number of rows : 42
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 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
4 ACO 389 ClG 02 51 24.74 -24 56 39.5           ~ 69 0
5 ACO 3112 ClG 03 17 52.9 -44 15 06           ~ 329 1
6 ACO 3158 ClG 03 43 07.5 -53 38 09           ~ 327 0
7 ACO 3330 ClG 05 14 47.4 -49 04 19           ~ 36 2
8 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
9 ACO 644 ClG 08 17 26.1 -07 31 13           ~ 241 0
10 ZwCl 0839+2937 ClG 08 42 55.9 +29 27 26     17.0     ~ 93 0
11 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
12 ACO 795 ClG 09 24 11.26 +14 09 03.5           ~ 120 0
13 ACO 951 ClG 10 14 01.6 +34 42 18           ~ 23 0
14 ACO 963 ClG 10 17 03.4 +39 02 56           ~ 414 0
15 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
16 ACO 1204 ClG 11 13 32.2 +17 35 40           ~ 101 0
17 ACO 1278 ClG 11 30 04.8 +20 28 38           ~ 32 0
18 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
19 NAME NGC 4073 Group GrG 12 04 44.08 +01 48 40.9     13.53     ~ 292 0
20 ACO 3556 ClG 13 24 06.2 -31 39 38           ~ 159 0
21 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
22 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
23 ACO 1882 ClG 14 14 24.02 -00 22 39.9           ~ 47 0
24 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
25 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
26 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
27 ACT-CL J1521.8+0742 ClG 15 21 48.8 +07 43 41     15.13     ~ 326 0
28 ACO 2100 ClG 15 36 37.4 +37 38 45           ~ 27 0
29 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
30 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
31 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
32 MCG+01-43-006 SyG 16 51 07.9886687784 +04 59 35.547131472     18.25     ~ 502 1
33 ACO 2240 ClG 16 54 04 +66 44.3           ~ 17 0
34 ACO 2235 ClG 16 54 44.5 +40 02 51           ~ 35 0
35 ACO 2249 ClG 17 09 36.76 +34 28 04.1           ~ 136 0
36 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
37 ACO 3716 ClG 20 51 16.7 -52 41 43           ~ 123 1
38 ACO 2399 ClG 21 57 19.01 -07 50 57.5           ~ 197 0
39 ACO 2448 ClG 22 32 00.59 -08 25 29.5           ~ 43 0
40 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
41 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 183 0
42 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 364 0

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