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

Bibcode
1993SSRv...66..395V
DOI
10.1007/BF00771089
Vanbeveren, D.; Herrero, A.; Kunze, D.; van Kerkwijk, M.
Bibliographical reference

Space Science Reviews, Volume 66, Issue 1-4, pp. 395-400

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3
1993
Journal
Space Science Reviews
Number of authors
4
IAC number of authors
0
Citations
12
Refereed citations
8
Description
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 we conclude that the optical star is highly helium enriched and is significantly overluminous compared to standard evolutionary tracks of massive accretion stars. We then propose a new accretion model able to explain these features.
Type
Non-refereed

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