Non-LTE Effects in the Atmospheres of F-Type Supergiants - Part Two - Analysis of NAI Lines (The Method of Computations)

Details Non-LTE Effects in the Atmospheres of F-Type Supergiants - Part Two - Analysis of NAI Lines (The Method of Computations) Non-LTE Effects in the Atmospheres of F-Type Supergiants - Part Two - Analysis of NAI Lines (The Method of Computations)

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988afz....28..335b&link_type=abstract

Astrofizika, Vol.28:2, P. 335-342, 1988

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The method of non-LTE computations of Na I lines is described. The calculations were aimed to reveal a probable connection between the observed sodium overabundance in F-K supergiants and departures from LTE in Na I lines is used for the analysis. Special attention is given to subordinate lines, therefore the accepted model of Na I atom includes 19 levels instead of 7-9 levels as in the previous investigations [3-6]. A list of stars for which the lines are computed compiles six F-supergiants and three dwarfs (table 1). The data on the studied Na I lines are adduced (table 2).

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