Nitrogen abundance in early B-stars
I. NLTE calculations for Pegasi
S.M. Andrievsky and
Received 24 September 1998 / Accepted 3 November 1998
Based on Kurucz (1992) grid of models the NLTE calculations of nitrogen abundance in Peg atmosphere revealed a slight deficiency of this element comparably to solar value (). Together with the recent result on carbon abundance in this star atmosphere (; 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 Peg.
The list of N ii lines that can be used for LTE calculation of nitrogen abundance in hot stars is also presented.
Key words: stars: abundances stars: early-type stars: individual: fl Peg
Send offprint requests to: Korotin S.A.
© European Southern Observatory (ESO) 1999
Online publication: February 23, 1999