The lithium abundance in extreme halo stars

Details The lithium abundance in extreme halo stars The lithium abundance in extreme halo stars

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...375..116h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 375, July 1, 1991, p. 116-120.

Other

52

Abundance, Dwarf Stars, Lithium, Absorption Spectra, Galactic Evolution, Metallicity, Stellar Spectra

Scientific paper

New observations are reported of atmospheric Li abundances for six extremely metal-poor dwarfs with Fe-H ratios not higher than -2.59 and T(e) not lower than 5950 K. The spectra were obtained in 1990 at Kitt Peak National Observatory, using the echelle spectrograph with the UV Fast camera. The resulting Li abundances for these stars range between N(Li) values of 1.99 and 2.24, where N(Li) = 12 + log (Li/H). These results agree with the abundances reported previously for five other metal-poor dwarfs with the Fe/H ratios not above -2.60. The invariance of Li abundance in these 11 stars indicates a primordial origin for most of the Li observed in these Galactic stars.

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