Lithium-rich Giants in Globular Clusters

Details Lithium-rich Giants in Globular Clusters Lithium-rich Giants in Globular Clusters

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop...80p&link_type=abstract

NOAO Proposal ID #2001A-0080

Computer Science

Scientific paper

The WIYN spectroscopic survey of globular cluster giants identified about a dozen giants whose spectra show either clear or probable detections of lithium (lambda)6707. These giants comprise about 2% of our sample. Standard evolution models predict that no cluster giants should have detectable lithium features. We propose to follow up these discoveries to a) confirm the detection of lithium and determine lithium abundances with higher resolution, higher signal-to-noise ratio spectra, b) analyse their spectra to determine abundances to see how they differ from normal giants (and specifically if their Na and Al abundances are high), and c) determine if the stars are anomalously fast rotators by measuring vsini from the line profiles.

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