The Universality of Initial Conditions for Globular Cluster Formation

Details The Universality of Initial Conditions for Globular Cluster Formation The Universality of Initial Conditions for Globular Cluster Formation

2004-03-09

arxiv.org/abs/astro-ph/0403210v1

Astrophys.J. 605 (2004) L121

Astronomy and Astrophysics

Astrophysics

12 pages, 4 figures, 1 table. Accepted for publication in ApJ Letters

Scientific paper

10.1086/420898

We investigate a simple model for globular cluster (GC) formation. We simulate the violent relaxation of initially homogeneous isothermal stellar spheres and show that it leads to the formation of clusters with radial density profiles that match the observed profiles of GCs. The best match is achieved for dynamically unevolved clusters. In this model, all the observed correlations between global GC parameters are accurately reproduced if one assumes that all the clusters initially had the same value of the stellar density and the velocity dispersion. This suggests that the gas which formed GCs had the same values of density and temperature throughout the universe.

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