The Lithium-Poor Stars - Additional Observations

Details The Lithium-Poor Stars - Additional Observations The Lithium-Poor Stars - Additional Observations

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271l...1s&link_type=abstract

Astronomy and Astrophysics, Vol.271, NO. 1/APRI, P. L1, 1993

Astronomy and Astrophysics

Astrophysics

29

Stars: Population Ii, Abundance: Lithium, Lithium Depletion

Scientific paper

The warm halo dwarfs have lithium abundances closely gathered around a mean value which is near the value log N(Li) = 2.1 dex (in a scale where log N(H) = 12). However 3 halo stars are reported in the literature with clearly lower values (Hobbs et al. 1991, Thorburn, 1992). Our observations of the halo star, G 66-30 (Teff = 6400K, log g = 3.0 [Fe/H] = -1.61), show that this star is also clearly lithium-poor. The data available about the star G 66-30 are presented, and it is argued that the Li depletion in halo dwarfs is really very exceptional. The possible interpretations are discussed.

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