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Nucleosynthesis in the Stellar Systems ω Centauri and M22

Published online by Cambridge University Press:  02 January 2013

G. S. Da Costa  and
A. F. Marino
G. S. Da Costa*
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Mt Stromlo Observatory, via Cotter Rd, Weston, ACT 2611, Australia
A. F. Marino
Affiliation:
Dipartimento di Astronomia, Università di Padova, vicolo dell'Osservatorio 2, I-35122 Padova, Italy
*
CCorresponding author. Email: [email protected]
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Abstract

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The stellar system ω Centauri (ω Cen) is well known for the large range in elemental abundances among its member stars. Recent work has indicated that the globular cluster M22 (NGC 6656) also possesses an internal abundance range, albeit substantially smallerthan that in ω Cen. Here we compare, as a function of [Fe/H], element-to-iron ratios in the two systems for a number of different elements using data from abundance analyses of red giant branch stars. It appears that the nucleosynthetic enrichment processes were very similar in these two systems despite the substantial difference in total mass.

Keywords

globular clusters: generalglobular clusters: individual (M22, ω Cen)stars: abundances
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 28 , Issue 1 , 2011 , pp. 28 - 37
Copyright
Copyright © Astronomical Society of Australia 2011

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