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A test of synthetic accretion disk spectra using ultraviolet flux distributions of novalike variablesUltraviolet (UV) fluxes and other data for a sample of nine novalike cataclysmic variables are assembled from the literature. The UV fluxes and colors are compared to spectra of steady state model accretion disks, constructed using either Planck functions or model stellar atmosphere spectra as elementary radiators. Deficiencies are found with both sets of models. The restriction to steady state radial temperature profiles is relaxed for the 'stellar atmosphere' disks, but these generalized models still fail to account simultaneously for the absolute UV flux and the UV color of the observed spectra. The conclusion is that stellar atmosphere models do not reflect the physics of disks. More appropriate models probably can and definitely should be made.
Document ID
19890031963
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wade, Richard A.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 335
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A19334
Funding Number(s)
CONTRACT_GRANT: NAG5-703
CONTRACT_GRANT: NSF AST-85-14778
Distribution Limits
Public
Copyright
Other

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