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Thomas Fauchez, Michaël De Becker & Yaël Nazé

The X-ray emission of the colliding wind binary V444 Cyg

(Volume 80 - Année 2011)
Article
Open Access

Abstract

This paper presents the analysis of six XMM-Newton observations of the colliding wind system V444 Cyg. Unlike what one might have expected at first, it appears that the O star wind most probably dominates the WN wind: the bow shock is wide open, with the hard X-ray emission arising close to the WN star. An important radiative braking could partly explain this situation but revising the wind parameters may also prove necessary. Furthermore, we have probably observed for the first time an occultation of the colliding wind zone by the binary components.

To cite this article

Thomas Fauchez, Michaël De Becker & Yaël Nazé, «The X-ray emission of the colliding wind binary V444 Cyg», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 673 - 677 URL : http://popups.ulg.be/0037-9565/index.php?id=3138.

About: Thomas Fauchez

Department of Astrophysics, Geophysics and Oceanography, University of Liège, Belgium

About: Michaël De Becker

Department of Astrophysics, Geophysics and Oceanography, University of Liège, Belgium, and Observatoire de Haute-Provence, Saint-Michel l’Observatoire, France

About: Yaël Nazé

Department of Astrophysics, Geophysics and Oceanography, University of Liège, Belgium