2005AJ....130.1315S

Query : 2005AJ....130.1315S

2005AJ....130.1315S - Astron. J., 130, 1315-1323 (2005/October-0)

Extragalactic globular clusters: old spectroscopic ages and new views on their formation.

STRADER J., BRODIE J.P., CENARRO A.J., BEASLEY M.A. and FORBES D.A.

Abstract (from CDS):

We present the results of a meta-analysis of Keck spectra of extragalactic globular clusters (GCs) in a sample of eight galaxies, ranging from dwarf galaxies to massive elliptical galaxies. We infer ages for the metal-poor and metal-rich GCs in these galaxies through comparisons to Galactic GCs. Both subpopulations appear to be no younger than their Galactic counterparts, with ages ≳10 Gyr. This is the largest sample of galaxies for which ages have been constrained spectroscopically. Our results support the formation of most GCs in massive galaxies at high redshift. We propose a scenario for the formation of GC subpopulations that synthesizes aspects of both accretion and in situ approaches in the context of galaxy formation through hierarchical merging.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Formation - Galaxies: Star Clusters - Galaxy: Globular Clusters: General

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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
4 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
5 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
6 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
7 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
8 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
9 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
10 NGC 1407 rG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 613 2
11 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
12 DDO 78 G 10 26 27.9 +67 39 24   15.8       ~ 88 1
13 NGC 3610 GiG 11 18 25.2827189856 +58 47 10.433735988   11.4       ~ 327 0
14 NGC 3921 LIN 11 51 06.8803989360 +55 04 43.414457484   13.4 12.64     ~ 260 1
15 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 871 0
16 IC 3381 LSB 12 28 14.8698618648 +11 47 23.359165728   14.42       ~ 173 1
17 M 104 LIN 12 39 59.43185902 -11 37 22.9961800 9.51 9.55 8.00 8.05   ~ 1465 2
18 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
19 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
20 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
21 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
22 NGC 7252 AGN 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 720 1
23 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
24 NGC 7457 AG? 23 00 59.9263288440 +30 08 41.764398792   11.04 11.87     ~ 459 0

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