Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...141..279d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 141, no. 2, Dec. 1984, p. 279-296. Sponsorship: Fonds de la Recherche Fondamen
Astronomy and Astrophysics
Astronomy
35
B Stars, Binary Stars, Stellar Models, X Ray Astronomy, X Ray Stars, Infrared Astronomy, Roche Limit, Stellar Envelopes, Stellar Evolution, Ultraviolet Astronomy, Visible Spectrum
Scientific paper
The characteristics of the Be/X-ray binary system HDE 245770/A0535+26 are examined from UV, visual, IR and X-ray data. A sequence of observations in the optical preceding an X-ray outburst is interpreted as the ejection of a shell by the Be primary. An evolutionary scenario is presented that produces a system like HDE 245770. An effective temperature of 26000±2000K is derived for the Be star. The mass loss rate through stellar wind from the primary is determined. The Be star is not filling its Roche lobe and there is no accretion disk around the compact companion. The system configuration can be simulated with an evolution code allowing for the simultaneous evolution of two components - a 20 M_sun; primary and a 15 M_sun; secondary - producing Be/X-ray binaries of this kind, with systems like φ Per as progenitor.
Bartolini Corrado
Burger Marc
de Loore Camiel
Ferrari-Toniolo Marco
Giangrande A.
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