Abundances in Near-Turnoff Stars in the Globular Cluster M 71

Details Abundances in Near-Turnoff Stars in the Globular Cluster M 71 Abundances in Near-Turnoff Stars in the Globular Cluster M 71

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005nupha.758..300k&link_type=abstract

Nuclear Physics A, Vol. 758, p.300-303

Physics

Nuclear Physics

1

Scientific paper

We have obtained high-resolution, moderate S/N spectroscopy of 5 near-turnoff stars in the intermediate metallicity ([Fe/H]˜ -0.8) globular cluster M 71. These data are used to derive the abundances of 10 elements. For the particular elements examined here, no evidence of star-to-star scatter is seen, and our results, by and large, confirm previous results based on evolved stars in the cluster. A notable exception, however, is that our unremarkable near-solar [Ba/Y] ratio is considerably smaller than that inferred from the cluster giants. Whether this is a signature of post-cluster-formation pollution, surprising in situ processing, or systematic analysis errors is unclear. Additional work on the light-s elements (Rb, Sr, Zr) in our near-turnoff objects might clarify the issue.

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