Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.3804c&link_type=abstract
American Astronomical Society, 182nd AAS Meeting, #38.04; Bulletin of the American Astronomical Society, Vol. 25, p.856
Other
1
Scientific paper
The brightest EUV source in the sky in the long wavelength spectrometer band of EUVE is the B2 II star Epsilon CMa. The star is also detected in the short and medium wavelength spectral bands and several emission lines from Fe and from He II are present. These provide exciting new information regarding the shocked wind of the star. A strong stellar continuum flux is present throughout the long wavelength band from about 400 to 700 Angstroms, with a continuum jump due to the ionization of He I near 504 Angstroms. The jump contains information about the very small interstellar attenuation that is present along the 187 parsecs towards this star, as well as about the confluence of lines just longward of the jump. The observations are used in conjunction with angular diameter and UV data on this star to derive Teff and other fundamental atmospheric parameters. Basic results from fits of the observations to model atmospheres and stellar winds are presented in the talk, and reference is made to the related posters by members of our group of investigators: J. MacFarlane, D. Cohen at U. Wisc; J. Vallerga, B. Welsh, P. Vedder at CEA; and J. Drew and M. Hoare at the U. of Oxford.
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