UV Spectroscopic Indices of Galactic Globular Clusters

Details UV Spectroscopic Indices of Galactic Globular Clusters UV Spectroscopic Indices of Galactic Globular Clusters

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009nqsa.conf..163m&link_type=abstract

New Quests in Stellar Astrophysics. II. Ultraviolet Properties of Evolved Stellar Populations, Proceedings of the International

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present the calculation of a set of 12 mid-ultraviolet (1900-3200 Å) spectroscopic indices for a sample of 15 galactic globular clusters (GGC) observed with the International Ultraviolet Explorer (IUE). We explore the dependence of the indices on age and metal abundance. We found that five indices (BL 2538, Fe II 2609, Mg II 2800, Mg I 2852 and Mg Wide) display a remarkably good correlation with [Fe/H]. With respect to age, only one index (BL 2740) shows a good correlation. Results from theoretical simple stellar populations well reproduce the global trends of indices vs. [Fe/H].

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