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A study of extreme-ultraviolet emission from cataclysmic variablesVoyager far- and extreme UV spectrophotometric observations of five cataclysmic variables (the dwarf novae SS Cyg and VW Hyi and the novalike variables V3885 Sgr, RW Sex, and IX Vel) are combined with neutral hydrogen column densities derived from the curve-of-growth analysis of interstellar absorption lines in high-resolution IUE spectra to place upper limits on the emitted flux in the 600-700 A EUV band. The Voyager observations of VW Hyi were obtained during both normal and superoutbursts. Detailed accretion disk model calculations show that most of the 600-700 A flux in these systems should originate in the inner accretion disk rather than in the boundary layer. For VW Hyi, the low neutral hydrogen column and excellent Voyager superoutburst data place the observed upper limit to the 600-700 A flux well below the expected EUV flux from the model calculations.
Document ID
19900049593
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Polidan, Ronald S.
(NASA Goddard Space Flight Center Greenbelt, MD; Arizona, University, Tucson, United States)
Mauche, Christopher W.
(Los Alamos National Laboratory NM, United States)
Wade, Richard A.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 14, 2013
Publication Date
June 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 356
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A36648
Funding Number(s)
CONTRACT_GRANT: JPL-957763
CONTRACT_GRANT: NSF AST-88-18069
CONTRACT_GRANT: NAGW-587
CONTRACT_GRANT: NSF AST-85-14778
CONTRACT_GRANT: NAG5-8565
Distribution Limits
Public
Copyright
Other

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