The mass and helium discrepancy in massive stars: the case Vela X-1.

Vanbeveren, D.; Herrero, A.; Kunze, D.; van Kerkwijk, M.
Referencia bibliográfica

Meeting: Evolution of massive stars, p. 395 - 400

Fecha de publicación:
1994
Número de autores
4
Número de autores del IAC
1
Número de citas
2
Número de citas referidas
2
Descripción
A NLTE-analysis is presented of high S/N spectra of the optical component of the standard massive X-ray binary Vela X-1. In combination with the orbital parameters the authors conclude that the optical star is highly helium enriched and is significantly overluminous compared to standard evolutionary tracks of massive accretion stars. The authors then propose a new accretion model able to explain these features.