2014ApJ...797..128H

Query : 2014ApJ...797..128H

2014ApJ...797..128H - Astrophys. J., 797, 128 (2014/December-3)

Globular cluster systems in brightest cluster galaxies: a near-universal luminosity function?

HARRIS W.E., MORNINGSTAR W., GNEDIN O.Y., O'HALLORAN H., BLAKESLEE J.P., WHITMORE B.C., COTE P., GEISLER D., PENG E.W., BAILIN J., ROTHBERG B., COCKCROFT R. and BARBER DEGRAAFF R.

Abstract (from CDS):

We present the first results from our Hubble Space Telescope brightest cluster galaxy (BCG) survey of seven central supergiant cluster galaxies and their globular cluster (GC) systems. We measure a total of 48,000 GCs in all seven galaxies, representing the largest single GC database. We find that a log-normal shape accurately matches the observed the luminosity function (LF) of the GCs down to the globular cluster luminosity function turnover point, which is near our photometric limit. In addition, the LF has a virtually identical shape in all seven galaxies. Our data underscore the similarity in the formation mechanism of massive star clusters in diverse galactic environments. At the highest luminosities (L ≳ 107 L☉), we find small numbers of "superluminous" objects in five of the galaxies; their luminosity and color ranges are at least partly consistent with those of ultra-compact dwarfs. Last, we find preliminary evidence that in the outer halo (R ≳ 20 kpc), the LF turnover point shows a weak dependence on projected distance, scaling as L0∼ R –0.2, while the LF dispersion remains nearly constant.

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Journal keyword(s): galaxies: formation - galaxies: star clusters: general - globular clusters: general

Simbad objects: 28

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Number of rows : 28
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 S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
2 NAME HYA SUPERCL SCG 08 57.9 +03 10           ~ 204 0
3 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 200 0
4 NGC 3268 EmG 10 30 00.6490581240 -35 19 31.519591284   12.57 11.77 10.68   ~ 163 0
5 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
6 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
7 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
8 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
9 NGC 4696 rG 12 48 49.2724775784 -41 18 39.304053252   11.21   10.7   ~ 510 3
10 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
11 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
12 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
13 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
14 MCG-04-32-016 EmG 13 26 44.1102601752 -27 26 21.486264792   13.98   12.66 12.95 ~ 50 1
15 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
16 ACO 1736 ClG 13 26 52.1 -27 06 33           ~ 268 2
17 MCG-05-32-026 rG 13 27 56.884 -31 29 43.71   13.88 15 12.24 12.76 ~ 88 2
18 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
19 MCG-05-33-002 rG 13 47 28.385 -32 51 54.02   13.02   11.53 12.50 ~ 67 1
20 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
21 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
22 Z 49-90 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 463 4
23 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
24 Z 108-73 rG 16 02 17.0257413888 +15 58 28.670337876   14.9       ~ 95 0
25 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
26 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
27 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
28 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 565 4

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