Globular cluster abundance anomalies: clues from the main sequence

Details Globular cluster abundance anomalies: clues from the main sequence Globular cluster abundance anomalies: clues from the main sequence

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13q.156d&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

Globular Clusters, Element Abundances

Scientific paper

This team has been conducting a 2.5Ang resolution spectroscopic survey of large samples of globular cluster stars using the 2dF multi-object spectrograph on the Anglo-Australian telescope. The majority of the stars lie on the main sequence below the cluster turnoffs. I will present results for the clusters NGC 6397 M55 NGC 6752 and 47 Tuc concentrating on CN and CH band strength variations and on results for the Na D lines. I will also review other spectroscopic studies of globular cluster main sequence stars and the constraints they imply for the origin of the abundance anomalies. A separate presentation (Stanford et al) will cover our results for the cluster Omega Centauri.

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