Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..116..483s&link_type=abstract
Astronomy and Astrophysics Supplement, v.116, p.483-494
Astronomy and Astrophysics
Astrophysics
13
Stars: Abundances, Stars: Early-Type, Galaxy: Abundances
Scientific paper
High resolution spectra of six early B-type main-sequence stars having galactocentric distances of between 10 and 18 kpc are presented. We list the equivalent widths for the metal lines and illustrate their hydrogen and helium line profiles. The stars are analysed using LTE line-blanketed model atmosphere techniques to derive atmospheric parameters and surface chemical compositions. All six stars have similar effective temperatures and surface gravities, allowing a reliable comparison of their metal abundances and distances. Significant variations in the photospheric abundances are evident and we discuss the need for a more detailed line-by-line differential analysis to exactly quantify the differences. This will be presented in a companion paper (Smartt et al. 1996).
Dufton Philip L.
Rolleston William Robert J.
Smartt Stephen J.
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