Titre du document

## A Spectroscopic Study of Two Southern B-Type Variables

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Nom du Corpus

#### AstroConcepts

Auteur(s)
• M. Breger
Affiliation(s)
• Communicated by the Radcliffe Observer
Résumé

New spectra of the ? CMa variable ? Lupi taken in 1965 show an outflow of hydrogen relative to He I and metal lines in nearly all phases. This outflow, however, is found to be smaller by a factor of 3 than the reported outflow in 1960. Furthermore, the velocity amplitude has decreased to about 16 km/s. The velocity of ? Cen varies with a very short period of between 3 and $3\frac12$ hours (with the amplitude varying between 10 and 20 km/s) as well as with one which may be more than a year. Together with the spectral type (B2 II) this suggests a ? CMa star in a binary system. The extreme width of the spectral lines is unusual for a ? CMa star, and the period is very short for a ? CMa star. It is postulated that ? Cen is intermediate in type between the usual ? CMa variables and ‘normal’ B stars.

Langue(s) du document
Indéterminé
Année de publication
1967
Revue

#### Monthly Notices of the Royal Astronomical Society

Éditeur
OUP
Type de publication
journal
Type de document
research-article
Présence de XML structuré
Non
Version de PDF
1.4
Score de qualité du texte
3.885
Nom du concept
• Beta Canis Majoris stars
Catégories Science-Metrix
• 1 - natural sciences ; 2 - physics & astronomy ; 3 - astronomy & astrophysics
Catégories Inist
• 1 - sciences appliquees, technologies et medecines ; 2 - sciences biologiques et medicales ; 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
• 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Space and Planetary Science
• 1 - Physical Sciences ; 2 - Physics and Astronomy ; 3 - Astronomy and Astrophysics
Catégories WoS
• 1 - science ; 2 - astronomy & astrophysics
Identifiant ISTEX
39E1889953CFB3AE93988931FCCCD0CD5F41055A