XMM-Newton Proposal 02056503

Details XMM-Newton Proposal 02056503 XMM-Newton Proposal 02056503

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..295p&link_type=abstract

XMM-Newton Proposal ID #02056503

Computer Science

Hd 215835, Hd 57060, Hd 57060, Xmm-Newton Proposal 02056503

Scientific paper

We propose to observe DH Cep and UW CMa, two of the most massive O-star binary systems in our Galaxy. Both systems are expected to contain a highly radiative wind-wind collision region, and are the ideal complement to the XMM AO1 observations of Plaskett's star (one wind radiative) and HD 159176 (neither wind radiative), and to our proposal to observe V444 Cyg, a Wolf-Rayet + O-star system. As it appears likely that the wind-wind shock collapses onto the surface of the secondary star in UW CMa, DH Cep and UW CMa should have quite different colliding wind characteristics. DH Cep is also a member of the young open cluster NGC 7380, and we will conduct a detailed investigation of its population of X-ray sources.

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