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The energy distribution of Sirius BThe 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.
Document ID
19810032859
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Boehm-Vitense, E.
(Washington, University Seattle, Wash., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1979
Subject Category
Astrophysics
Meeting Information
Meeting: Annual Workshop on Novae, Dwarf Novae and Other Cataclysmic Variables
Start Date: August 3, 1979
Accession Number
81A17263
Funding Number(s)
CONTRACT_GRANT: NSG-5240
Distribution Limits
Public
Copyright
Other

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