Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...172..257b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 172, no. 1-2, Jan. 1987, p. 257-264.
Astronomy and Astrophysics
Astrophysics
15
Abundance, Lithium, Metallic Stars, Peculiar Stars, Resonance Lines, Stellar Composition, A Stars, Binary Stars, Dwarf Stars, F Stars, Stellar Envelopes, Stellar Oscillations, Stellar Temperature
Scientific paper
The Li I-resonance line at λ6707 Å has been observed with Reticon spectra of high resolution and good signal-to-noise ratio in a sample of a few Am, δ Del, and reference main sequence F stars. The model atmospheres of Kurucz were used to calculate the abundance of Li. In Am stars, Li may be overabundant, normal, or underabundant, with respect to the cosmic abundance. The range of Li abundance is as large as two orders of magnitude. The Li abundance dependence on temperature does not seem simple. In δ Del stars, Li may be slightly overabundant, normal, or underabundant. The range of Li abundance is about two orders of magnitude, similar to the Am one. The authors can assert that both components of the double-line spectroscopic binary Am star HR 8293 are overabundant in Li.
Burkhart C.
Coupry M. F.
Lunel M.
Van't Veer C.
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