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


Verdugo, Eva y Talavera, A. y 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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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.

Tipo de documento:Artículo
Palabras clave:Terminal velocities; stellar winds; super-giants; milky-way; mass-loss; stars; spectrograph; associations; photometry; galaxy; atlases; line : profiles; stars : supergiants; ultraviolet : stars
Materias:Ciencias > Matemáticas > Astronomía
Código ID:16488

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Última Modificación:07 Feb 2014 09:30

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