Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..284h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 1, 1985, p. 284-288.
Astronomy and Astrophysics
Astrophysics
17
Dwarf Stars, F Stars, G Stars, Lithium Isotopes, Stellar Composition, Abundance, Spectral Line Width, Spectrum Analysis, Stellar Atmospheres, Stellar Spectra
Scientific paper
Observations of the 6707-A LiI doublet obtained at high resolution and photometric precision are reported for two F dwarfs and three G dwarfs known to have narrow lines and strong 6707-A absorption. Adjacent lines of Ca 1 and Fe 1 are used to predetermine accurately the position and the broadening of theoretical LiI profiles fitted to the observed ones, leaving the abundances of Li-6 and Li-7 as the only adjustable parameters of the calculated profiles. Upper limits R = (Li-6)/(Li-7) less than 0.1 are obtained for four of the stars, while R is less than about 0.1 for Xi UMa A. The total Li/H abundances range from 3 x 10 to the -10th to 10 x 10 to the -10th, with uncertainties probably not exceeding a factor of 2.
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