Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..182c&link_type=abstract
Astrophysical Journal, Part 1, vol. 234, Nov. 15, 1979, p. 182-187.
Astronomy and Astrophysics
Astrophysics
13
Astronomical Spectroscopy, Eclipsing Binary Stars, Novae, Stellar Spectra, Absorption Spectra, H Beta Line, Helium Ions, Radial Velocity, Stellar Mass Ejection
Scientific paper
Spectroscopic observations at 30 and 15 A/mm are presented of the recurrent nova WZ Sge during its 1978 December outburst. The data cover about two orbital cycles on both December 6 and 7, about 1 mag below maximum light. The spectrum does not resemble that of a nova, or indicate extensive mass outflow, but rather suggests the event was brightening of the accretion disk in the system. Absorption-line radial velocities appear to have amplitudes considerably larger than previously estimated, but may not be entirely orbital. Emission-line intensities and profiles are also presented and discussed. They suggest formation in an enlarged disk, and some contribution from a stream or hot spot whose velocity amplitude is lower than previously observed.
Cowley Anne Pyne
Crampton David
Hutchings John B.
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