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Not so lonely: The LBV binary HR Car

  • T. Rivinius (a1), H. M. J. Boffin (a1) (a2), A. Mérand (a1) (a2), A. Mehner (a1), J.-B. LeBouquin (a3), D. Pourbaix (a4), W.-J. de Wit (a1) and C. Martayan (a1)...

Abstract

Luminous Blue Variables (LBVs) are a brief phase in the evolution of massive stars, but a very important one. The giant eruptions remain enigmatic, but the discovery of the flagship LBV η Car to be a five-year highly eccentric binary put focus on possible binarity induced mechanism for these outbursts, and prompted binarity searches among LBVs. While several wide LBV binaries were identified, HR Car is the first system found to be similar to η Car, i.e., relatively close & eccentric.

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References

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Boffin, H. M. J., Rivinius, T., Mérand, A., et al. 2016, A&A, 593, A90
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