Helium-rich stars in globular clusters: constraints for self-enrichment by massive stars

Details Helium-rich stars in globular clusters: constraints for self-enrichment by massive stars Helium-rich stars in globular clusters: constraints for self-enrichment by massive stars

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..268..135d&link_type=abstract

Light Elements in the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 268, p. 135-140

Astronomy and Astrophysics

Astronomy

Stars: Abundances, Evolution, Horizontal-Branch, Mass Loss – Globular Clusters: General

Scientific paper

Globular clusters exhibit peculiar chemical patterns where Fe and heavy elements are constant inside a given cluster while light elements (Li to Al) show strong star-to-star variations. This pattern can be explained by self-pollution of the intracluster gas by the slow winds of fast rotating massive stars. Besides, several main sequences have been observed in several globular clusters which can be understood only with different stellar populations with distinct He content. Here we explore how these He abundances can constrain the self-enrichment in globular clusters.

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