NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
X-ray emission from white dwarfs.It is suggested that both the 250-eV background radiation and the recently observed variations in the optical emission from certain white dwarfs may be due to thermal bremsstrahlung from hot coronae surrounding such stars. The X-ray flux from the variable white dwarfs is predicted and in the most favorable case, R548, is sufficiently large to allow an observational test of the model. The possibility that the variations observed in strong X-ray sources are due to pulsations in the coronae surrounding degenerate stars, rather than in stars themselves, is also discussed. For the white dwarfs, both pulsation and rotation of the central star are found to be adequate sources of coronal energy, with pulsation being subject to relatively easy observational test. The energy requirements for the strong X-ray sources are briefly discussed.
Document ID
19720046888
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Strittmatter, P. A.
Brecher, K.
Burbidge, G. R.
(California, University San Diego, Calif., United States)
Date Acquired
August 6, 2013
Publication Date
May 15, 1972
Publication Information
Publication: Astrophysical Journal
Volume: 174
Subject Category
Space Radiation
Accession Number
72A30554
Funding Number(s)
CONTRACT_GRANT: NGL-05-005-004
CONTRACT_GRANT: NGL-05-005-003
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available