2009AJ....137.4450M

Query : 2009AJ....137.4450M

2009AJ....137.4450M - Astron. J., 137, 4450-4467 (2009/May-0)

The radio luminosity function and galaxy evolution in the Coma cluster.

MILLER N.A., HORNSCHEMEIER A.E., MOBASHER B., BRIDGES T.J., HUDSON M.J., MARZKE R.O. and SMITH R.J.

Abstract (from CDS):

We investigate the radio luminosity function and radio source population for two fields within the Coma cluster of galaxies, with the fields centered on the cluster core and southwest infall region and each covering about half a square degree. Using VLA data with a typical rms sensitivity of 28 µJy per 4".4 beam, we identify 249 radio sources with optical counterparts brighter than r = 22. For cluster galaxies, these correspond to L1.4= 1.7x1020 W/Hz(for a 5σ source) and Mr= -13. Comprehensive optical spectroscopy identifies 38 of these as members of the Coma cluster, evenly split between sources powered by an active nucleus and sources powered by active star formation. The radio-detected star-forming galaxies are the dominant population only at radio luminosities between about 1021 and 1022 W/Hz, an interesting result given star formation dominates field radio luminosity functions for all luminosities lower than about 1023 W/Hz. The majority of the radio-detected star-forming galaxies have characteristics of starbursts, including high specific star formation rates and optical spectra with strong emission lines. In conjunction with prior studies on post-starburst galaxies within the Coma cluster, this is consistent with a picture in which late-type galaxies entering Coma undergo a starburst prior to a rapid cessation of star formation. Optically bright elliptical galaxies (Mr≤ -20.5) make the largest contribution to the radio luminosity function at both the high (≳3x1022 W/Hz) and low (≲1021 W/Hz) ends. Through a stacking analysis of these optically bright ellipticals we find that they continue to harbor radio sources down to luminosities as faint as 3x1019 W/Hz. However, contrary to published results for the Virgo cluster we find no evidence for the existence of a population of optically faint (Mr~ -14) dwarf ellipticals hosting strong radio AGNs.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: Abell 1656 - galaxies: evolution - galaxies: luminosity function, mass function - radio continuum: galaxies

Simbad objects: 44

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Number of rows : 44
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 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
2 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
3 NGC 4819 LIN 12 56 27.8492514984 +26 59 14.687190240 14.49 14.10 13.17 12.81   ~ 84 1
4 IC 3913 EmG 12 56 28.5817741560 +27 17 28.501401516   15.82 14.94 14.97   ~ 105 0
5 LEDA 94036 EmG 12 56 34.603 +27 13 39.04   16.53 15.51 15.44   ~ 34 0
6 NGC 4827 LIN 12 56 43.5187101000 +27 10 43.654438128   13.90 12.91     ~ 125 1
7 Z 160-33 Sy2 12 56 51.1606237152 +26 53 55.926453768   15.1   14.42   ~ 53 0
8 NGC 4839 BiC 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 482 3
9 Mrk 55 LIN 12 57 25.2481557048 +27 24 16.550025768   16.0       ~ 78 0
10 NGC 4842A LIN 12 57 35.8534614792 +27 29 35.689996896   14.9       ~ 87 0
11 2MASX J12575662+2702144 AGN 12 57 56.6727537768 +27 02 14.996048712           ~ 25 0
12 TT 33 AGN 12 58 18.6318954144 +27 18 38.983019940   16.95 15.94 15.69   ~ 83 0
13 NGC 4853 rG 12 58 35.1979266912 +27 35 46.930900632 13.96 14.68 13.00 13.24   ~ 156 1
14 Z 160-64 EmG 12 58 35.335 +27 15 52.92   15.4 15.18 15.14   ~ 106 0
15 Z 160-67 AGN 12 58 37.27827 +27 10 35.7420   15.88 14.71 14.50   ~ 129 1
16 2MASX J12583788+2727497 GiC 12 58 37.881 +27 27 49.70   15 15.85 15.60   ~ 26 0
17 LEDA 1787484 EmG 12 58 39.948 +26 45 34.29   16.62 15.57 15.45   ~ 37 0
18 IC 3949 AGN 12 58 55.952 +27 50 00.40 15.31 15.10 14.26 14.781 14.083 ~ 148 1
19 Z 160-214 AGN 12 59 01.8109774776 +28 13 31.188539316 15.48 15.3 14.01     ~ 63 0
20 NGC 4858 EmG 12 59 02.0718950520 +28 06 56.228264028 15.33 15.5 15.08 15.16   ~ 126 0
21 Z 160-73 EmG 12 59 05.2918849008 +27 38 40.186270032 14.90 15.1 14.54     ~ 129 0
22 NGC 4864 GiG 12 59 13.129 +27 58 36.91 15.338 14.8 13.872 13.321 12.594 ~ 136 0
23 [EDG2007] 682 GiC 12 59 15.24 +27 46 05.7 20.164 20.756 20.231 20.039 18.527 ~ 11 0
24 NGC 4867 GiG 12 59 15.2505719952 +27 58 14.616353712 15.60 15.5 14.14 13.969 13.213 ~ 129 0
25 SDSS J125916.38+274618.2 GiC 12 59 16.389 +27 46 18.25 20.22 19.80 18.98 18.29 17.77 ~ 15 0
26 NGC 4865 EmG 12 59 19.8737739096 +28 05 03.488821044 15.06 14.6 13.692 13.131 12.443 ~ 115 0
27 NGC 4869 EmG 12 59 23.3588349024 +27 54 41.731884360 15.03 14.9 13.52 13.292 12.536 ~ 286 0
28 PN H 4-1 PN 12 59 27.78107 +27 38 10.6612           OB 167 0
29 IC 3976 G 12 59 29.4017977320 +27 51 00.507145788 15.93 15.5 14.42 14.212 13.495 ~ 111 0
30 NGC 4872 AGN 12 59 34.1212116072 +27 56 48.678716616 15.58 14.7 14.10 14.092 13.423 ~ 141 0
31 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
32 LEDA 44643 EmG 12 59 39.8152735224 +27 34 35.193798804   16.53 15.56 15.42   ~ 55 0
33 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
34 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
35 Z 160-243 AGN 13 00 09.1410758256 +27 51 59.343513912 16.418 16.39 15.51 15.34 14.835 ~ 133 0
36 NGC 4898 IG 13 00 17.6 +27 57 22   14.7       ~ 46 0
37 NGC 4895 LIN 13 00 17.9283615768 +28 12 08.593323732 14.57 14.3 13.09     ~ 110 0
38 Z 160-86 EmG 13 00 33.732 +27 38 15.64   15.4 14.54 14.23   ~ 117 0
39 LEDA 44785 GiC 13 00 35.6790730896 +27 34 26.982195312   15.5 15.01 14.82   ~ 51 0
40 IC 4040 EmG 13 00 37.9703238053 +28 03 26.882897167 15.13 15.1 15.04 14.74 13.981 ~ 175 2
41 IC 4042 AGN 13 00 42.7595583480 +27 58 16.579136856 15.44 15.272 14.01 13.713 13.025 ~ 105 0
42 IC 4045 AGN 13 00 48.6521997192 +28 05 26.675160468 15.25 15.1 13.77 13.573 12.895 ~ 153 0
43 IC 4051 EmG 13 00 54.4630403184 +28 00 27.502143300 15.04 14.8 13.50 13.003 12.305 ~ 218 0
44 NGC 4911 LIN 13 00 56.0616749160 +27 47 27.152821212 14.58 13.7 13.33 12.601 12.068 ~ 218 1

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