Non-LTE analysis of the atmospheric sodium abundances of peculiar disk stars

Details Non-LTE analysis of the atmospheric sodium abundances of peculiar disk stars Non-LTE analysis of the atmospheric sodium abundances of peculiar disk stars

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43..533k&link_type=abstract

Astronomy Reports, Volume 43, Issue 8, August 1999, pp.533-539

Astronomy and Astrophysics

Astronomy

13

Scientific paper

High-resolution CCD spectra are used to determine the sodium abundances in the atmospheres of 12 peculiar disk stars with sodium excesses, taking into account deviations from local thermodynamic equilibrium. In some cases, the non-LTE corrections reach 0.2 dex, and it is necessary to calculate them in each individual case. On average, however, the magnitude of these corrections does not exceed 0.1 dex, and the sodium excesses for most of the stars are not eliminated by taking these corrections into account.

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