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An unexpected result for the V444 Cyg binary

Published online by Cambridge University Press:  25 February 2014

Y. Nazé ,
J. Lomax  and
J. Hoffman
Y. Nazé
Affiliation:
FNRS-Dept AGO, Allée du 6 Août 17, B5C, University of Liège, 4000 Liège, Belgium
J. Lomax
Affiliation:
Department of Physics & Astronomy, University of Oklahoma, 440 W Brooks St., Norman, OK 73019, USA
J. Hoffman
Affiliation:
Department of Physics & Astronomy, University of Denver, 2112 E. Wesley Ave., Denver, CO 80208, USA
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Abstract

V444 Cyg is a short-period (4 d) binary composed of two massive objects, a WN star and an O star. The winds of the two massive components collide, generating X-ray emission. A monitoring campaign in the high-energy domain was performed using Swift and XMM-Newton, with surprising results on the collision geometry (wide shock opening angle, clear Coriolis deflection). Polarimetric data further help to understand the system properties. This new information places strong constraints on the physical parameters of the two stars.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 64: Setting a New Standard in the Analysis of Binary Stars , 2013 , pp. 415 - 416
Copyright
© EAS, EDP Sciences, 2014

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References

Fauchez, T., De Becker, M., & Nazé, Y., 2011, Bull. Soc. Royale Sci. Liège, 80, 673