SIMBAD references

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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