| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 137, Number 2, June I 1999
|
|
|---|---|---|
| Page(s) | 351 - 362 | |
| DOI | https://doi.org/10.1051/aas:1999487 | |
| Published online | 15 June 1999 | |
Understanding A-type supergiants*,**
I. Ultraviolet and visible spectral atlas of A-type supergiants
1
ISO Data Centre, P.O. Box 50727, E-28080-Madrid, Spain
2
LAEFF/INTA, P.O. Box 50727, E-28080-Madrid, Spain
3
Instituto de Astronomía y Geodesia (CSIC-UCM), Fac. cc. Matemáticas, Universidad Complutense, Av. Complutense s/n, E-28040-Madrid, Spain
Send offprint request to: E. Verdugo
Received:
14
October
1997
Accepted:
12
April
1999
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 and ultraviolet. The atlas consists of profiles of the Hα, Hβ, Hγ, Hδ, Hϵ, Ca II (H and K), Na I (D1 and D2), Mg II 4481, 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.
Key words: atlases / line: profiles / stars: supergiants / ultraviolet: stars
Based on observations made with the INT and JKT telescopes operated on the island of La Palma by the RGO in the Spanish Observatorio del Roque de Los Muchachos of the Instituto de Astrofisica de Canarias, with the 2.2 m telescope at Calar Alto Observatory, Spain, with the Bernard Lyot 2 m telescope at Pic Du Midi Observatory, France and observations collected at the European Southern Observatory at La Silla, Chile.
© European Southern Observatory (ESO), 1999