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Ultraviolet spectroscopy of the recurrent nova U Scorpii during outburstObservations of the recurrent nova U Sco during the 1979 outburst are presented, and the spectral evolution is found to differ from that of other recurrent novas. Spectra are dominated by emission lines, and the strong forbidden-line emission characteristic is conspicuously absent. A method to determine masses of nova shells is outlined, and an analysis of the emission lines shows an enrichment in N relative to C and O, and that the nova ejecta are rich in He relative to H. Optical spectra of U Sco obtained following its return to quiescence show predominantly He II emission lines, which suggests an enrichment of the preoutburst gas in He, and thus the presence of a highly evolved companion.
Document ID
19820035864
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Williams, R. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sparks, W. M.
(NASA Goddard Space Flight Center Laboratory for Astronomy and Solar Physics, Greenbelt, MD, United States)
Gallagher, J. S.
(Illinois, University Urbana, IL, United States)
Ney, E. P.
(Minnesota, University Minneapolis, MN, United States)
Starrfield, S. G.
(Arizona State University Tempe, AZ; Los Alamos National Laboratory, Los Alamos, NM, United States)
Truran, J. W.
(Illinois, University Urbana, IL; Cambridge University, Cambridge, United Kingdom)
Date Acquired
August 10, 2013
Publication Date
December 1, 1981
Publication Information
Publication: Astrophysical Journal
Subject Category
Astronomy
Accession Number
82A19399
Funding Number(s)
CONTRACT_GRANT: NSF AST-77-15865
CONTRACT_GRANT: NSF AST-78-20123
CONTRACT_GRANT: NSF AST-79-21073
CONTRACT_GRANT: NAG5-171
Distribution Limits
Public
Copyright
Other

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