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arXiv · 2410.14458

X-raying the wind-wind collisions in HD 168112 and HD 167971

Gregor Rauw·Ronny Blomme·Yaël Nazé·Delia Volpi
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Abstract

The O-type long-period binary HD 168112 and triple HD 167971 star systems have been known for several decades for their non-thermal synchrotron radio emission. This emission arises from relativistic electrons accelerated in the hydrodynamic shocks of the wind collisions in these systems. Such wind collisions are expected to produce a strong X-ray emission that varies as a function of orbital phase. In wide eccentric binaries, such as our targets, the X-ray emission arises from an adiabatic plasma and its intensity should scale as the inverse of the orbital separation. We present a set of XMM-Newton observations of these systems which help us gain insight into the properties of their wind interactions.

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Gregor Rauw, Ronny Blomme, Yaël Nazé, Delia Volpi. 2024-10-18. X-raying the wind-wind collisions in HD 168112 and HD 167971. https://arxiv.org/abs/2410.14458

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