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Extragalactic Supergiants

Published online by Cambridge University Press:  28 July 2017

Miguel A. Urbaneja  and
Rolf P. Kudritzki
Miguel A. Urbaneja
Affiliation:
Institut für Astro- und Teilchen-Physik, Universität Innsbruck, Technikerstr. 25/8, A-6020, Innsbruck, Austria email: [email protected]
Rolf P. Kudritzki
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu HI 96822, USA email: [email protected]
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Abstract

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Blue supergiant stars of B and A spectral types are amongst the visually brightest non-transient astronomical objects. Their intrinsic brightness makes it possible to obtain high quality optical spectra of these objects in distant galaxies, enabling the study not only of these stars in different environments, but also to use them as tools to probe their host galaxies. Quantitative analysis of their optical spectra provide tight constraints on their evolution in a wide range of metallicities, as well as on the present-day chemical composition, extinction laws and distances to their host galaxies. We review in this contribution recent results in this field.

Keywords

stars: abundancesearly-typesupergiantsgalaxies: abundancesdistances and redshiftscosmology: distance scale
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 297 - 304
Copyright
Copyright © International Astronomical Union 2017 

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