Volume 389, Number 2, July II 2002
|Page(s)||519 - 523|
|Section||Stellar structure and evolution|
|Published online||27 June 2002|
Sodium enrichment of stellar atmospheres
I. Non-variable supergiants and bright giants
Department of Astronomy, Odessa State University, Shevchenko Park, 65014 Odessa, Ukraine e-mail: email@example.com; firstname.lastname@example.org
2 Instituto Astronômico e Geofísico, Universidade de São Paulo, Av. Miguel Stefano, 4200 Agua Funda, Brasil
3 Odessa Astronomical Observatory and Isaac Newton Institute of Chile, Odessa Branch, Ukraine
4 Observatoire de Haute-Provence, 04870 Saint-Michel l'Observatoire, France
Corresponding author: S. M. Andrievsky, email@example.com
Accepted: 15 April 2002
48 supergiants and bright giants have been observed in order to investigate the sodium enrichment of their atmospheres and its connection with stellar gravity. We present the equivalent widths of the 6154 Å and 6160 Å lines measured from the program spectra, the results of effective temperature determinations, the NLTE sodium abundances, and the derived relation between the sodium overabundance and surface gravity.
Key words: stars: abundances / stars: supergiants
© ESO, 2002
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