Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995arcl.reptq....w&link_type=abstract
Final Report, 15 Feb. 1994 - 14 Feb. 1995 Applied Research Corp., Landover, MD.
Physics
B Stars, Extreme Ultraviolet Radiation, O Stars, Stellar Spectra, Stellar Winds, X Ray Sources, Opacity, Photosphere, Spectrum Analysis, Stellar Models, X Ray Absorption
Scientific paper
Our 20 ks observation did not allow us to carry out our primary objective, i.e., to test the limitations of deeply embedded EUV and X-ray sources. However, it did provide a very useful constraint in our analysis of a newly acquired high S/N ROSAT PSPC X-ray spectrum of Zeta Pup. In addition, modifications to our stellar wind opacity code have been preformed to investigate the sensitivity of the EUV opacity energy range to different photospheric model flux inputs and different wind structures. These analyses provided the justification for a 140 ks follow up EUVE Cycle III observation of this star. We have recently been informed that our requested observation has been accepted as a Type 1 target for Cycle III. The remainder of this report focuses on the following: (1) a brief background on the status of X-ray emission from OB stars; (2) a discussion on the importance of EUV observations; (3) a discussion of our scientific objectives; and (4) a summary of our technical approach for our Cycle III observation (including the predicted EUV counts for various lines.)
Vallerga John
Waldron Wayne L.
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