Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bsrsl..80..653d&link_type=abstract
Société Royale des Sciences de Liège, Bulletin, vol. 80, p. 653-657 (Proceedings of the 39th Liège Astrophysical Colloquium, hel
Astronomy and Astrophysics
Astronomy
1
Stars: Individual: Wr 140, X-Rays: Stars, Stars: Wolf-Rayet, Astronomy X-Rays
Scientific paper
An XMM-Newton campaign dedicated to the study of the X-ray emission of the colliding wind massive binary WR140 across its 2009 periastron passage has been undertaken. The high quality EPIC spectra revealed a strong phase-locked variability both in flux and in spectral shape. The observed variations are consistently explained by the varying emission measure of the emitting plasma along the eccentric orbit, and by the changing absorption column density along the line of sight. Our results are first interpreted in the context of simple multi-temperature thermal emission models, and prospects for more sophisticated modelling are discussed.
de Becker Michael
Pittard Julian Mark
Williams Peredur
WR140 Consortium
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