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

AuthorsVerdugo, Eva; Talavera, Antonio; Gómez de Castro, Ana Inés
Issue Date1999
PublisherEDP Sciences
CitationAstronomy and Astrophysics - Supplement Series, 137, p. 351-362 (1999)
AbstractThis paper is the rst 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 and ultraviolet. The atlas consists of pro les of the H , H , H , H , H , 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.
Publisher version (URL)http://dx.doi.org/10.1051/aas:1999487
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