Publication Date:
2019-07-13
Description:
The origin of the X-ray emission observed from the DA white dwarf Sirius B is investigated on the basis of low-resolution short wavelength IUE spectrum. Following a correction for the influence of scattered light from Sirius A, the intensity distribution of Sirius B is obtained as a function of wavelength. Comparison of the continuous energy distribution with model atmosphere energy distributions indicates an effective temperature of 25,500 K, which is not high enough to explain the observed X rays as normal photospheric radiation. In addition, with the exception of an unusual feature in the neighborhood of the C I 1657 line, no clear evidence is found of emission lines indicative of a corona, chromosphere or disk, and the origin of the X rays remains unknown.
Keywords:
ASTROPHYSICS
Type:
Annual Workshop on Novae, Dwarf Novae and Other Cataclysmic Variables; Aug 03, 1979|Colloquium on White Dwarfs and variable degenerate stars; Jul 30, 1979 - Aug 02, 1979; Rochester, NY; US
Format:
text
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