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An unresolved X-ray source inside the supernova remnant RCW 86

Jacco Vink·Fabrizio Bocchino·Francesco Damiani·Jelle S. Kaastra
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Abstract

We report on the discovery of an unresolved X-ray source inside the supernova remnant G315.4-2.3 (RCW 86). The source is located 7' to the Southwest of the geometrical centre and may be close to the actual explosion centre of the supernova, which makes this a candidate for the stellar remnant associated with RCW 86. However, the presence of a possible optical counterpart with $V \sim 14$ at 3" from the X-ray position and evidence for long term variability means that the source is probably an active star. A better X-ray position and better X-ray spectroscopy along with an identification of the optical source are needed to exclude the X-ray source as a neutron star candidate.

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Jacco Vink, Fabrizio Bocchino, Francesco Damiani, Jelle S. Kaastra. 2000-08-29. An unresolved X-ray source inside the supernova remnant RCW 86. https://arxiv.org/abs/astro-ph/0008457

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