2010ApJ...715..881D

Query : 2010ApJ...715..881D

2010ApJ...715..881D - Astrophys. J., 715, 881-896 (2010/June-1)

Star formation and UV colors of the brightest cluster galaxies in the representative XMM-Newton cluster structure survey.

DONAHUE M., BRUCH S., WANG E., VOIT G.M., HICKS A.K., HAARSMA D.B., CROSTON J.H., PRATT G.W., PIERINI D., O'CONNELL R.W. and BOHRINGER H.

Abstract (from CDS):

We present UV broadband photometry and optical emission-line measurements for a sample of 32 brightest cluster galaxies (BCGs) in clusters of the Representative XMM-Newton Cluster Structure Survey (REXCESS) with z = 0.06-0.18. The REXCESS clusters, chosen to study scaling relations in clusters of galaxies, have X-ray measurements of high quality. The trends of star formation and BCG colors with BCG and host properties can be investigated with this sample. The UV photometry comes from the XMM-Newton Optical Monitor, supplemented by existing archival Galaxy Evolution Explorer photometry. We detected Hα and forbidden line emission in seven (22%) of these BCGs, in optical spectra obtained using the Southern Astrophysical Research Goodman spectrograph. All of these emission-line BCGs occupy clusters classified as cool cores (CCs) based on the central cooling time in the cluster core, for an emission-line incidence rate of 70% for BCGs in REXCESS CC clusters. Significant correlations between the Hα equivalent widths, excess UV production in the BCG, and the presence of dense, X-ray bright intracluster gas with a short cooling time are seen, including the fact that all of the Hα emitters inhabit systems with short central cooling times and high central intracluster medium densities. Estimates of the star formation rates based on Hα and UV excesses are consistent with each other in these seven systems, ranging from 0.1to8 solar masses per year. The incidence of emission-line BCGs in the REXCESS sample is intermediate, somewhat lower than in other X-ray-selected samples (∼35%), and somewhat higher than but statistically consistent with optically selected, slightly lower redshift BCG samples (∼10%-15%). The UV-optical colors (UVW1 - R ∼4.7±0.3) of REXCESS BCGs without strong optical emission lines are consistent with those predicted from templates and observations of ellipticals dominated by old stellar populations. We see no trend in UV-optical colors with optical luminosity, R-K color, X-ray temperature, redshift, or offset between X-ray centroid and X-ray peak (〈w〉). The lack of such trends in these massive galaxies, particularly the ones lacking emission lines, suggests that the proportion of UV-emitting (200-300 nm) stars is insensitive to galaxy mass, cluster mass, cluster relaxation, and recent evolution, over the range of this sample.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: intracluster medium - galaxies: elliptical and lenticular, cD - ultraviolet: galaxies - X-rays: galaxies: clusters

Simbad objects: 81

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Number of rows : 81
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 2MASX J00034964+0203594 BiC 00 03 49.6725370824 +02 03 59.385120948           ~ 15 0
2 ACO 2700 ClG 00 03 49.7 +02 03 59           ~ 94 0
3 ACO 2721 ClG 00 05 57.0 -34 43 09           ~ 99 0
4 2MASXI J0005597-344317 BiC 00 05 59.756 -34 43 17.17   16.15   14.98   ~ 10 0
5 ACO 22 ClG 00 20 41.4 -25 42 39           ~ 111 0
6 NVSS J002042-254239 rG 00 20 43.142 -25 42 28.40   16.233   14.742   ~ 8 0
7 CD-34 239 PM* 00 41 30.4739854200 -33 37 32.030888686 13.138 11.969 10.525 9.619 8.741 K9V 116 0
8 2MASXI J0049228-293106 BiC 00 49 22.8302804160 -29 31 07.166319132   15.93   15.03   ~ 4 0
9 2MASS J00492286-2931124 BiC 00 49 22.8587459760 -29 31 12.849132648   17.09 14.84     ~ 5 0
10 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
11 LEDA 6421 EmG 01 44 58.9493351112 -53 01 11.627495760   17.87   15.67   ~ 6 0
12 ACO 2941 ClG 01 45 03.60 -53 01 23.4           ~ 61 0
13 CD-28 595 PM* 01 54 50.2703221766 -27 28 35.739139915   12.06 11.51     ~ 138 0
14 2MASXI J0211248-401726 BiC 02 11 24.8615795184 -40 17 26.377715328           ~ 4 0
15 ACO 2984 ClG 02 11 25.1 -40 17 29           ~ 53 0
16 BAX 036.2925-29.4731 ClG 02 25 08.6 -29 28 34           ~ 36 0
17 2MASS J02250904-2928383 BiC 02 25 09.0327111840 -29 28 38.154430956           ~ 2 0
18 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
19 ACO S 384 ClG 03 45 45.0 -41 10 42           ~ 40 0
20 MCG-07-08-006 Sy1 03 45 46.3607385336 -41 12 15.337782396   15.11       ~ 20 1
21 3C 129 rG 04 49 09.064 +45 00 39.40   19       ~ 273 2
22 NVSS J054737-315223 rG 05 47 37.7457693024 -31 52 23.998850112   17.91   16.25   ~ 6 1
23 ACO 3364 ClG 05 47 38.1 -31 52 15           ~ 86 0
24 ACO 3378 ClG 06 05 53.7 -35 18 06           ~ 90 1
25 LEDA 650626 AGN 06 05 54.0318058320 -35 18 07.766698860   17.66 17.0 15.98   ~ 23 1
26 MARD J061720.6-475002 ClG 06 16 51.4 -47 47 41           ~ 39 0
27 ESO 206-2 BiC 06 16 51.6482799672 -47 47 42.884950560   16.27   14.18   ~ 6 0
28 2MASX J06452948-5413365 BiC 06 45 29.489 -54 13 36.57   17.69   15.77   ~ 6 0
29 ACO 3404 ClG 06 45 29.50 -54 13 37.0           ~ 109 0
30 ACO 653 ClG 08 21 50.6 +01 11 49           ~ 47 0
31 2MASX J08215065+0111495 BiC 08 21 50.6516654544 +01 11 49.513475580           ~ 7 0
32 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 137 0
33 NVSS J095821-110347 rG 09 58 22.0045525896 -11 03 50.391575172   17.69   15.98   ~ 10 1
34 CD-34 6792 PM* 10 32 13.6185546336 -35 37 41.711776068   12.84 11.84     F:wl: 158 0
35 NVSS J104432-070407 rG 10 44 32.8730790384 -07 04 07.424149836   18.10   16.23   ~ 10 0
36 ACO 1084 ClG 10 44 37.1 -07 04 47           ~ 78 0
37 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 70 0
38 PMN J1141-1216 rG 11 41 24.19701482 -12 16 38.6465880   16.66   14.20   ~ 18 1
39 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
40 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
41 2MASX J12364125-3355321 BiC 12 36 41.250 -33 55 32.11   16.2       ~ 7 0
42 ACO S 700 ClG 12 36 41.8 -33 55 01           ~ 33 0
43 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
44 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 185 2
45 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 325 0
46 2MASX J13025254-0230590 BiC 13 02 52.540 -02 30 59.07   15.30   13.86   ~ 23 0
47 ACO 1663 ClG 13 02 52.55 -02 31 04.0           ~ 112 0
48 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
49 SDSS J131129.50-012027.9 BiC 13 11 29.510 -01 20 28.02   17.87 16.48 15.75 15.16 ~ 30 1
50 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
51 2MASX J15161794+0005203 BiC 15 16 17.9335191072 +00 05 20.561482320   19.7       ~ 16 0
52 ACO 2050 ClG 15 16 18.7 +00 05 31           ~ 122 0
53 NVSS J151644-005809 rG 15 16 44.169 -00 58 09.64   17.17   15.86   ~ 14 0
54 ACO 2051 ClG 15 16 47.15 -01 00 32.8           ~ 68 0
55 BAX 249.5848-64.5165 ClG 16 38 13.2 -64 21 21           ~ 123 0
56 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 222 0
57 ACT-CL J2014.8-2430 ClG 20 14 49.7 -24 30 30           ~ 93 0
58 PMN J2014-2430 rG 20 14 51.716 -24 30 22.99   18.00   16.17   ~ 9 1
59 ESO 596-24 BiC 20 22 59.114 -20 56 56.18   15.65 15.6 13.99   ~ 25 1
60 ACO S 868 ClG 20 22 59.5 -20 56 40           ~ 35 1
61 ACO 2328 ClG 20 48 09.8 -17 50 14           ~ 78 0
62 NVSS J204812-174902 rG 20 48 11.6657439641 -17 49 02.784290422   16.93   15.39   ~ 7 0
63 LEDA 129806 BiC 21 29 42.5005438776 -50 49 25.512073500   16.06       ~ 9 0
64 ACO 3771 ClG 21 29 43.2 -50 48 34           ~ 50 0
65 ACO 3814 ClG 21 49 07.24 -30 42 06.4           ~ 60 0
66 NVSS J214907-304204 rG 21 49 07.375 -30 42 04.36   16.39   14.94   ~ 9 1
67 ESO 600-14 BiC 21 52 09.5639491200 -19 43 23.819766852   16.23       ~ 15 0
68 RXC J2152.2-1942 ClG 21 52 14.2 -19 42 20           ~ 11 0
69 ACO 2399 ClG 21 57 19.01 -07 50 57.5           ~ 197 0
70 2MASX J21572939-0747443 BiC 21 57 29.42547 -07 47 44.4930   15.89   14.69   ~ 38 1
71 ACO 3854 ClG 22 17 45.72 -35 43 31.4           ~ 75 0
72 2MASX J22174585-3543293 BiC 22 17 45.8385751104 -35 43 29.011981800           ~ 5 0
73 ESO 344-19 rG 22 18 39.3962069160 -38 54 01.842648264   16.28   14.73   ~ 9 0
74 ACO 3856 ClG 22 18 45.2 -38 53 57           ~ 87 2
75 6dFGS gJ223424.6-374331 BiC 22 34 24.5939186664 -37 43 30.704143548   18.54   16.29   ~ 12 0
76 ACO 3888 ClG 22 34 26.3 -37 44 29           ~ 151 1
77 LP 877-23 PM* 22 52 41.0353986762 -20 35 32.994432457   13.02 11.90     ~ 119 0
78 2MASX J23194046-7313366 BiC 23 19 40.5632421192 -73 13 36.417238356           ~ 5 0
79 ACO 3992 ClG 23 19 41.8 -73 13 51           ~ 38 0
80 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
81 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 349 3

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