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Understanding A-type supergiants - I. Ultraviolet and visible spectral atlas of A-type supergiants

Verdugo, Eva and Talavera, A. and Gómez de Castro, Ana Inés (1999) Understanding A-type supergiants - I. Ultraviolet and visible spectral atlas of A-type supergiants. Astronomy & astrophysics supplement series, 137 (2). pp. 351-362. ISSN 0365-0138

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Abstract

This paper is the first of a series whose aim is to perform a systematic study of A-type supergiant atmospheres and winds. Here we present a spectral atlas of 41 A-supergiants observed by us in high and medium resolution in the visible asd ultraviolet. The atlas consists of profiles of the H alpha, H beta, H gamma, H delta, H epsilon, Ca II (H and K), Na I (D1 and D2), Mg II4481, Mg II [uv1] and Fe II [uv1, uv2; uv3, uv62, uv63, uv161] lines for 41 stars with spectral types ranging from B9 to A9 and luminosity classes Ia, Iab and Ib, and provides the basic data for a thoughtful study of these stars. The overall characteristics of the sample as well as the data reduction procedures are described. We also present some examples of spectral variability.

Item Type:Article
Uncontrolled Keywords:Terminal velocities; stellar winds; super-giants; milky-way; mass-loss; stars; spectrograph; associations; photometry; galaxy; atlases; line : profiles; stars : supergiants; ultraviolet : stars
Subjects:Sciences > Mathematics > Astronomy
ID Code:16488
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