Self-enrichment in globular clusters. I. An analytic approach
Abstract
By means of analytical calculations, we explore the self-enrichment scenario for Globular Cluster formation. According to this scenario, an initial burst of star formation occurs inside the core radius of the initial gaseous distribution. The outward-propagating shock wave sweeps up a shell in which gravitational instabilities may arise, leading to the formation of a second, metal-enriched, population of stars. We find a minimum mass of the proto-globular cluster of the order of 10^6 solar masses. We also find that the observed spread in the Magnitude-Metallicity relation can be explained assuming cluster-to-cluster variations of some parameters like the thermalization efficiency, the mixing efficiency and the Initial Mass Function, as well as variations of the external pressure.
Keywords
Cite
@article{arxiv.astro-ph/0502443,
title = {Self-enrichment in globular clusters. I. An analytic approach},
author = {S. Recchi and I. J. Danziger},
journal= {arXiv preprint arXiv:astro-ph/0502443},
year = {2009}
}
Comments
12 pages, 13 figures, accepted for publication in A&A