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New Keck Observations of Lithium in Very Metal-poor Stars
Ann Merchant Boesgaard, Megan C. Novicki, Alex Stephens
Lithium abundances have been determined in more than 100 metal-poor halo stars both in the field and in clusters. From these data we find trends of Li with both temperature and met…
Lithium and Lithium Depletion in Halo Stars on Extreme Orbits
Ann Merchant Boesgaard, Alex Stephens, Constantine P. Deliyannis
We have determined Li abundances in 55 metal-poor (3.6 < [Fe/H] < -0.7) stars with extreme orbital kinematics. We find the Li abundance in the Li-plateau stars and examine its decr…
Chemical Composition in the Globular Cluster M71 from Keck/HIRES Spectra of Turn-Off Stars
Ann Merchant Boesgaard, Jeremy R. King, Ann Marie Cody +2
We have made observations with the Keck I telescope and HIRES at a resolution of 45,000 of five nearly identical stars at the turn-off of the metal-rich globular cluster M 71…