Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..845c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 845-855.
Astronomy and Astrophysics
Astrophysics
36
Dwarf Novae, Stellar Spectra, Visible Spectrum, Accretion Disks, Balmer Series, Emission Spectra, Helium, Light Curve
Scientific paper
Visible spectra covering 3900-5000 A with a spectral resolution of about 6 percent of the full width of the quiescent emission lines have been obtained each night during one full outburst cycle of the dwarf nova SS Cygni. The observed line changes and their qualitative interpretation are discussed, and a geometric modeling of the accretion disk surface brightness distributions required to reproduce the observed emission line profiles is presented. The spectra cover all phases of the outburst centered near Aug. 1, 1983 and allow the sequence of pronounced spectral changes in the H and He lines and their phasing with respect to the continuum brightening, which covered a factor of roughly 50, to be tabulated for the first time. A list of the observational effects from this one outburst which a successful model for outbursts from dwarf novae must explain is given.
Bowyer Stuart
Capel D.
Clarke John T.
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