A Supergiants
arXiv:astro-ph/0409160 · doi:10.1017/S174392130400482X
Abstract
A-type supergiants are primary targets for quantitative spectroscopy of individual stars in nearby galaxies because of their intrinsic brightness. An overview is given on the non-LTE techniques required for their analysis. Applications concentrate on placing observational constraints on evolutionary models for massive stars and their host galaxies by detailed abundance analyses. Results from high-resolution studies of A-type supergiants in Local Group galaxies and from intermediate-resolution multi-object spectroscopy of supergiants far beyond the Local Group are summarised.
8 pages, 7 figures; to appear in: conference proceedings IAU Symposium 224: The A-Star Puzzle, J. Zverko, W.W. Weiss, J. Ziznovsky, S.J. Adelman (eds.)