Metal-Rich Globular Clusters: an Unaccounted Factor Responsible for Their Formation?

Details Metal-Rich Globular Clusters: an Unaccounted Factor Responsible for Their Formation? Metal-Rich Globular Clusters: an Unaccounted Factor Responsible for Their Formation?

2006-05-03

arxiv.org/abs/astro-ph/0605109v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure; to be published in the proceedings of the conference "Globular Clusters - Guides to Galaxies", held in Conc

Scientific paper

Presently unaccounted but quite probable "chemical factor" may be responsible for the formation of old metal-rich globular clusters (MRGCs) in spheroids, as well as of their conterparts, young (intermediate-age) massive star clusters (MSCs) in irregulars. Their formation presumably occurs at the same stage of the host galaxies' chemical evolution and is related to the essentially increased SF activity in the hosts around the same metallicity, Zsol/3 ([Fe/H]~-0.5). It is achieved very soon in massive spheroids, later in lower-mass spheroids, and (much) more later in irregulars.

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