First detection of phase-dependent colliding wind X-ray emission outside the Milky Way

Details First detection of phase-dependent colliding wind X-ray emission outside the Milky Way First detection of phase-dependent colliding wind X-ray emission outside the Milky Way

2007-02-15

arxiv.org/abs/astro-ph/0702403v1

Astrophys.J.658:L25-L28,2007

Astronomy and Astrophysics

Astrophysics

13 pages, 3 figures and 1 table, accepted for publication in ApJ (letters)

Scientific paper

10.1086/513510

After having reported the detection of X-rays emitted by the peculiar system HD5980, we assess here the origin of this high-energy emission from additional X-ray observations obtained with XMM-Newton. This research provides the first detection of apparently periodic X-ray emission from hot gas produced by the collision of winds in an evolved massive binary outside the Milky Way. It also provides the first X-ray monitoring of a Luminous Blue Variable only years after its eruption and shows that the dominant source of the X-rays is not associated with the ejecta.

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