Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bsrsl..80..595w&link_type=abstract
Société Royale des Sciences de Liège, Bulletin, vol. 80, p. 595-609 (Proceedings of the 39th Liège Astrophysical Colloquium, hel
Astronomy and Astrophysics
Astrophysics
7
Scientific paper
The archetypal Wolf-Rayet + O star colliding-wind binary WR 140 has a very elliptical orbit, so that maximum interaction between the WR and O winds, and the most rapid changes in configuration, occur around periastron passage. To exploit this laboratory for studying wind-collision and high-energy phenomena, several groups mounted campaigns to observe WR 140 intensively around the most recent (2009) periastron passage. These included multi-site optical spectroscopy to refine the radial velocity orbit and study anomalous emission from the shock-compressed wind, infrared spectroscopy to study related features and map the wind-collision region, high-resolution radio imaging of the wind-collision shock, and X-ray observations with RXTE, XMM-Newton, Chandra and Suzaku to study physical conditions in the shocks. Some preliminary results from these campaigns will be surveyed and the synergy of multi-wavelength observations considered.
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