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- Title
Quantitative spectroscopy of mid B-type supergiants.
- Authors
Weßmayer, David; Przybilla, Norbert; Butler, Keith
- Abstract
B-type supergiants show enormous potential as resourceful tools to address a wide range of astrophysical questions concerning stellar atmospheres, stellar and galactic evolution and the cosmic distance scale. For the purposes of a comprehensive analysis of these objects we test a hybrid non-LTE approach – line-blanketed model atmospheres computed under the assumptions of local thermodynamic equilibrium (LTE) in combination with non-LTE line-formation calculations. An observational sample of 14 Galactic B-type supergiants with masses below about 30 M ȯ is investigated on the basis of high-resolution Echelle spectra. The results of this analysis – atmospheric and fundamental stellar parameters, the characterisation of the interstellar sightlines to the objects, as well as derived spectroscopic distances and multi-species abundances – are subjected to multiple tests of consistency.
- Subjects
LOCAL thermodynamic equilibrium; GALACTIC evolution; STELLAR evolution; ATMOSPHERIC models; SPECTROMETRY
- Publication
Proceedings of the International Astronomical Union, 2022, Vol 18, Issue S361, p200
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921322002046