XMM-Newton Proposal 02006803

Details XMM-Newton Proposal 02006803 XMM-Newton Proposal 02006803

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...34s&link_type=abstract

XMM-Newton Proposal ID #02006803

Computer Science

Wr52, Wr90, Wr111, Xmm-Newton Proposal 02006803

Scientific paper

We propose to conduct a sensitive search for X-ray emission in three of the closest known carbon-rich (WC) Wolf-Rayet stars. Our primary objective is to determine if WC stars without companions are X-ray emitters. It is currently believed that Wolf-Rayet stars emit X-rays via shocks in their powerful winds. However, an archive search reveals no convincing WC star detections and the WC star WR114 was recently undetected in a 16 ksec XMM exposure. The apparent absence of WC-star X-ray emission is surprising and so far unexplained, but strong X-ray absorption in their metal-rich winds may play a role. Our targets are selected on the basis of their proximity and low extinction, thus maximizing the chance of obtaining the first WC star X-ray detection.

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