| Type |
Conference Paper |
| Names |
Joy S. Nichols, W. Waldron, J. Cassinelli, N. Walborn, A. Mitschang |
| Proceedings Title |
Bulletin of the American Astronomical Society |
| Conference Name |
American Astronomical Society, Head Meeting #10, #29.08 |
| Volume |
10 |
| Date |
March 1, 2008 |
| Short Title |
HETG Emission Line Analysis of Stellar Wind Parameters |
| URL |
http://adsabs.harvard.edu/abs/2008HEAD...10.2908N |
| Library Catalog |
NASA ADS |
| Abstract |
We present the Chandra HETG spectra of two massive, very early O-type stars, HD93129AB and HD93250, comparing with those from later O-type stars. Two valuable X-ray emission line diagnostics are examined: 1) the He-like f/i line ratios which provide information on the stellar wind radial locations of the X-ray sources, and; 2) the H-like to He-like line ratios that can be used to determine the associated X-ray temperatures of these sources. The results for these massive early O-stars are checked for consistency with the general radial-dependent relationship between the X-ray temperatures and the fir-inferred radii as found by Waldron and Cassinelli (2007). In addition, these fir-inferred radii are also compared to their respective X-ray continuum optical unity radii. |