The Enigma of Symmetric X-Ray Profiles in O Stars

Details The Enigma of Symmetric X-Ray Profiles in O Stars The Enigma of Symmetric X-Ray Profiles in O Stars

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1399m&link_type=abstract

Chandra Proposal ID #05200810

Physics

Chandra Proposal Id #05200810

Scientific paper

We propose a 160 ks observation of the O7 III(n)(f) star Xi Per to determine whether the unexpected symmetric X-ray line profiles observed in most O stars by Chandra and XMM are due to the large spiral structures known to exist in the winds of most O and B stars. Because we speculate that gaps between the spiral structures allow X-rays to escape and produce the symmetric profiles and since Xi Per is known to have such structures, we expect its mean X-ray spectrum to have symmetric profiles. In addition, we will use the known period of its wind variability to identify X-ray line profile variability. If detected, the variability will constrain the location of the source of the X-rays and help distinguish between alternative models for X-ray production.

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