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Masses of the astrometric SB2 ζ Ori A†

Published online by Cambridge University Press:  12 July 2011

Thomas Rivinius ,
Christian A. Hummel  and
Otmar Stahl
Thomas Rivinius
Affiliation:
ESOChile
Christian A. Hummel
Affiliation:
ESO, Germany
Otmar Stahl
Affiliation:
ZAH/LSW Heidelberg, Germany
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Abstract

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We report the first dynamic mass for an O-type supergiant, the interferometrically resolved SB2 system ζ Ori A (O9.5Ib+B0/1). The separation of the system excludes any previous mass-transfer, ensuring that the derived masses can be compared to single star evolutionary tracks.

Keywords

stars: binariesstars: early-typestars: fundamental parameters (masses)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 539 - 540
Copyright
Copyright © International Astronomical Union 2011

References

Hadrava, P. 1995, A&AS, 114, 393Google Scholar
Hummel, C. A., White, N. M., Elias, N. M. II, Hajian, A. R. et al. 2000, ApJ (Letters), 540, L91CrossRefGoogle Scholar