High-Resolution Spectral Diagnostics of O-Star X-Ray Sources

Details High-Resolution Spectral Diagnostics of O-Star X-Ray Sources High-Resolution Spectral Diagnostics of O-Star X-Ray Sources

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..184c&link_type=abstract

Chandra Proposal ID #01200893

Physics

Chandra Proposal Id #01200893

Scientific paper

In the case of the fast O-star winds, the spectrometers on AXAF will provide for the first time the spectral resolution needed to derive velocities of the X-ray emitting material, significant constraints on the location of the emitting regions, and accurate characterizations of the temperature and density conditions of the X-ray sources. The wind absorption occurs not only by bound-free transistions, but by bound-bound inner shell transistions. Thus, diagnostic modelling of the AXAF spectra will provide new information not only about the state of the hot emitting plasma, but also about of the cool wind. We propose AXAF transmission grating observations of 3 bright O-stars: Iota Ori (LETG), Zeta Pup (METG/HETG), and Delta Ori (LETG).

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