Nitrogen abundance in early B-stars. I. NLTE calculations for gamma Pegasi

Details Nitrogen abundance in early B-stars. I. NLTE calculations for gamma Pegasi Nitrogen abundance in early B-stars. I. NLTE calculations for gamma Pegasi

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...342..756k&link_type=abstract

Astronomy and Astrophysics, v.342, p.756-762 (1999)

Astronomy and Astrophysics

Astrophysics

12

Stars: Abundances, Stars: Early-Type, Stars: Individual: Gamma Peg

Scientific paper

Based on Kurucz (1992) grid of models the NLTE calculations of nitrogen abundance in gamma Peg atmosphere revealed a slight deficiency of this element comparably to solar value ([N/Hright ] ~ -0.3). Together with the recent result on carbon abundance in this star atmosphere ([C/Hright ] = -0.25; Korotin et al., 1998), the present determination shows that turbulent diffusion in massive main sequence stars (discussed by Maeder, 1987) and connected with it the appearance of the CN-processed material at the stellar surface can hardly be operating in gamma Peg. The list of N Ii lines that can be used for LTE calculation of nitrogen abundance in hot stars is also presented.

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