Possible Origin of Multiple Populations in Globular Clusters

Details Possible Origin of Multiple Populations in Globular Clusters Possible Origin of Multiple Populations in Globular Clusters

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1314..151d&link_type=abstract

INTERNATIONAL CONFERENCE ON BINARIES: In celebration of Ron Webbink's 65th Birthday. AIP Conference Proceedings, Volume 1314, p

Physics

1

Globular Star Clusters, Stellar Evolution, Galaxies, Supernovae, Globular Clusters In The Milky Way, Black Holes, Galactic Halo, Supernovae

Scientific paper

A new paradigm is emerging for the formation of Globular Clusters, supported by recent surprising discoveries concerning the presence of more than one, numerically significant, stellar population in most of the clusters so far examined spectroscopically and/or photometrically.
Three main models are presently discussed to explain the formation of multiple populations. Here we shortly discuss a few pros and contras of these different models, and in particular the recent idea that the second generation stars are formed from gas ejected by interacting massive binaries into the intra cluster medium.
The model proposing that a second stellar generation is formed including the ejecta of massive asymptotic giant branch stars remains today the most plausible one, both from the chemical and dynamical point of view.

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