Nucleosynthesis in the Stellar Systems ω Centauri and M22
G. S. Da Costa A C and A. F. Marino B
+ Author Affiliations
- Author Affiliations
A Research School of Astronomy & Astrophysics, Australian National University, Mt Stromlo Observatory, via Cotter Rd, Weston, ACT 2611, Australia
B Dipartimento di Astronomia, Università di Padova, vicolo dell’Osservatorio 2, I-35122 Padova, Italy
C Corresponding author. Email: gdc@mso.anu.edu.au
Publications of the Astronomical Society of Australia 28(1) 28-37 https://doi.org/10.1071/AS10027
Submitted: 3 August 2010 Accepted: 7 September 2010 Published: 5 January 2011
Abstract
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 smaller than 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: general — globular clusters: individual (M22, ω Cen) — stars: abundances
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