Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-02-07
Astronomy and Astrophysics
Astrophysics
7 pages, 6 figures, to appear in A.S.P. Conf. Series "Massive Stellar Clusters" held in Strasbourg, Nov. 8-10, 1999, eds. A. L
Scientific paper
In this paper, we are exploring the properties of old, metal-poor globular clusters in galaxies. We investigate whether their properties are related to the properties of their host galaxies, and whether we can constrain their formation. The main result is that the mean metallicities of old GC systems are found to lie in a narrow range -1.7 < [Fe/H] < -1.1 (80 % of the population). Moreover, no correlations are found between the mean metallicities and other galaxy properties which implies a GC formation independent of the host galaxies. Further, we try to identify the sites of old, metal-poor GC formation, with any currently known high redshift objects. We find that the metalicities of damped Ly$\alpha$ systems in the redshift range 1.6 < z < 4 are consistent with our GC metalicities, which suggests that these high-density neutral gas objects may be the progenitors of the old, metal-poor globular clusters.
Buat Veronique
Burgarella Denis
Kissler-Patig Markus
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