Spectroscopic observations of WZ Sagittae during the 1978 outburst.
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1979
- DOI:
- 10.1086/157486
- Bibcode:
- 1979ApJ...234..182C
- Keywords:
-
- Astronomical Spectroscopy;
- Eclipsing Binary Stars;
- Novae;
- Stellar Spectra;
- Absorption Spectra;
- H Beta Line;
- Helium Ions;
- Radial Velocity;
- Stellar Mass Ejection;
- Astrophysics;
- Eclipsing Binaries:Novae;
- Novae:Radial Velocities;
- Novae:Spectra