A Survey for Enhanced Lithium in 261 Globular Cluster Giants

Details A Survey for Enhanced Lithium in 261 Globular Cluster Giants A Survey for Enhanced Lithium in 261 Globular Cluster Giants

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....119.2895p&link_type=abstract

The Astronomical Journal, Volume 119, Issue 6, pp. 2895-2901.

Astronomy and Astrophysics

Astronomy

13

Galaxy: Globular Clusters: Individual: Messier Number: M3, Galaxy: Globular Clusters: Individual: Messier Number: M13, Galaxy: Globular Clusters: Individual: Messier Number: M15, Galaxy: Globular Clusters: Individual: Messier Number: M92, Stars: Abundances, Stars: Late-Type, Stars: Population Ii

Scientific paper

A survey of 261 giants in the globular clusters M3, M13, M15, and M92 carried out with the Hydra multiobject spectrograph on the WIYN 3.5 m telescope has identified no stars with Li I 6707 Å resonance lines stronger than 20 mÅ. The limiting equivalent widths of the lithium line provide upper limits of logɛ(Li)<+0.0 at Teff=4500 K and logɛ(Li)<+1.0 at Teff=5000 K. The absence of lithium-rich stars in the sample suggests that the percentage of giants exhibiting enhanced lithium abundances in globular clusters is low.

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