X-Ray Emission from Nitrogen-Rich Wolf-Rayet Stars

Details X-Ray Emission from Nitrogen-Rich Wolf-Rayet Stars X-Ray Emission from Nitrogen-Rich Wolf-Rayet Stars

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...54s&link_type=abstract

XMM-Newton Proposal ID #06020203

Physics

Stars, White Dwarfs, Solar System, Wr79A, Wr78, Wr16

Scientific paper

Wolf-Rayet (WR) stars are massive evolved stars approaching the end of their lives as supernovae. Previous studies have focused on X-ray bright WR+OB colliding wind binaries, but much less is known about the X-ray emission of single WR stars. We have initiated a survey of single (non-binary) nitrogen-rich (WN-type) stars aimed at determining their X-ray properties and identifying possible emission processes. We have recently detected X-rays from a WN2 and a WN6 star with Chandra and an observation of a WN4 star is pending. We propose here to use XMM EPIC to extend this exploratory survey to the later WN7 - WN9 spectral types, thus providing a first-look at X-ray properties across the full spectral sequence.

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