The 1980 low state of AM Her.
Abstract
A series of spectrophotometric scans obtained with a 4.5 m multiple mirror telescope and a 2.3 m reflector is reported. Broad-band polarimetry obtained with the 2.3 reflector is also discussed. All observations were obtained between 1980 June 15-September 5, during which time the object was apparently in a consistent low state near 15th magnitude. Ultraviolet observations with the International Ultraviolet Explorer satellite were obtained on June 30. Attention is given to the polarized continuum radiation, the emission-line radiation, the secondary star, and the magnetic white dwarf photosphere. Much of the absorption observed in connection with the Zeeman absorption spectrum may be explained by hydrogen in a dominant magnetic field strength near 13 megagauss.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1981
- DOI:
- 10.1086/158985
- Bibcode:
- 1981ApJ...246..919L
- Keywords:
-
- Binary Stars;
- Circular Polarization;
- Magnetic Stars;
- Stellar Spectra;
- Stellar Spectrophotometry;
- X Ray Sources;
- Absorption Spectra;
- Continuous Radiation;
- Dwarf Stars;
- Emission Spectra;
- Infrared Stars;
- Line Spectra;
- Near Infrared Radiation;
- Polarized Radiation;
- Radial Velocity;
- Stellar Magnetic Fields;
- Stellar Mass Accretion;
- Astronomy