SIMBAD references

2015MNRAS.452..872Z - Mon. Not. R. Astron. Soc., 452, 872-877 (2015/September-1)

X-rays from the oxygen-type Wolf-Rayet binary WR 30a.


Abstract (from CDS):

We present an analysis of XMM-Newton X-ray data of WR 30a (WO+O), a close massive binary that harbours an oxygen-rich Wolf-Rayet star. Its spectrum is characterized by the presence of two well-separated broad peaks, or `bumps', one peaking at energies between 1 and 2 keV and the other between 5 and 7 keV. A two-component model is required to match the observed spectrum. The higher energy spectral peak is considerably more absorbed and dominates the X-ray luminosity. For the currently accepted distance of 7.77 kpc, the X-ray luminosity of WR 30a is LX > 1034 erg/s, making it one of the most X-ray luminous WR+O binaries amongst those in the Galaxy with orbital periods less than ∼ 20 d. The X-ray spectrum can be acceptably fitted using either thermal or non-thermal models, so the X-ray production mechanism is yet unclear.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): stars: individual: WR 30a - stars: Wolf-Rayet - X-rays: stars

Simbad objects: 12

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