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Did rotating AGB stars pollute the galactic globular clusters?

Published online by Cambridge University Press:  23 December 2005

T. Decressin  and
C. Charbonnel
T. Decressin
Affiliation:
Observatoire de Genève, 51 ch des Maillettes, 1290 Sauverny, Switzerland email: [email protected]
C. Charbonnel
Affiliation:
Observatoire de Genève, 51 ch des Maillettes, 1290 Sauverny, Switzerland email: [email protected] LA2T, OMP, CNRS UMR 5572, 14 Av. E. Belin, 31400 Toulouse, France email: [email protected]
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Abstract

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Stars in globular clusters exhibit abundance patterns such as the well-known O-Na and Mg-Al anticorrelations which have no counterpart among halo stars. Whereas winds from AGB stars have been proposed as the primordial sources for these anomalies, the impact of rotation in these stars has not been studied in the GC context. To address this issue we present a model of a rotating AGB star with an initial mass of 7 M[odot ] and a metallicity Z = 10−5. We discuss the effect of rotation on the evolutionary features, and focus on the surface abundances which can be modified by rotation, dredge-up events and hot bottom burning.

Keywords

Stars: AGB and post-AGB – globular clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 395 - 396
Copyright
© 2005 International Astronomical Union