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X-ray and ultraviolet radiation from accreting white dwarfs. IV - Two-temperature treatment with electron thermal conductionResults are reported from two-temperature calculations of the structures and X-ray spectra of radiation shocks generated by accretion onto nonmagnetic white dwarfs. The approach was necessitated by the domination of bremsstrahlung in the emission region by Compton cooling. Features of the shock model, which includes steady, spherical infall of fully ionized plasma and dominance of the stand-off shock by collisional processes, are summarized. A maximum hard X-ray temperature of about 50 keV and a maximum hard X-ray luminosity of 2 x 10 to the 36th ergs/sec were obtained. The results prove that the bulk of accretion energy cannot be transported to the star by electron thermal conduction, provided that bremsstrahlung cooling is dominant over cyclotron cooling.
Document ID
19870044554
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Imamura, J. N.
(Indiana University Bloomington; Los Alamos National Laboratory, NM, United States)
Durisen, R. H.
(Indiana University Bloomington, United States)
Lamb, D. Q.
(Indiana Univ. Bloomington, IN, United States)
Weast, G. J.
(Illinois, University Urbana; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Date Acquired
August 13, 2013
Publication Date
February 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 313
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A31828
Funding Number(s)
CONTRACT_GRANT: NAG8-352
CONTRACT_GRANT: NSG-7176
CONTRACT_GRANT: NAS5-24441
CONTRACT_GRANT: NSF PHY-78-04404
CONTRACT_GRANT: NAGW-246
CONTRACT_GRANT: NGR-22-007-272
Distribution Limits
Public
Copyright
Other

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