Using a Cool B Supergiant to Probe the Deepest X-Ray Emitting Layers of a Dense Stellar Wind

Details Using a Cool B Supergiant to Probe the Deepest X-Ray Emitting Layers of a Dense Stellar Wind Using a Cool B Supergiant to Probe the Deepest X-Ray Emitting Layers of a Dense Stellar Wind

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2541w&link_type=abstract

Chandra proposal ID #10200353

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Scientific paper

We are requesting a 234 ks HETGS observation of the early B supergiant Kappa Ori (B0.5Ia). Among the OB supergiants, Kappa Ori is one of the brightest, but it has not been observed at high spectral resolution. The wind properties of this star as compared to other OB stars will allow us to probe stellar wind distributed X-ray source models from a different perspective and allow us to address the serious issues pertaining to the origin of OB stellar X-ray emission. Models suggest that all f/i derived radii will be distributed at much deeper wind depths than previously determined allowing us to study the X-ray emission properties near the base of the wind. In addition, the first direct measurement of an OB stellar X-ray electron density may be possible.

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