Polarimetry and photometry of the polar AM Her.
Abstract
The observations discussed were made in the yellow region of the spectrum with a time resolution of approximately 4 min on 11 nights between April and September 1978. The results support a previously detected photometric variability in brightness and linear polarization. In most cases the maximum degree of polarization does not exceed 1.3 percent. An increase in the linear polarization maximum to 2 percent was observed only during a period of increased stellar brightness. At low brightness, no correlation was found between rapid changes in brightness and the degree of polarization. The variation of the mean polarization parameters with the phase of the orbital period is determined. In addition, the vector diagram of polarization is interpreted using a model of the polar with a displaced dipole magnetic field having poles of differing strength.
- Publication:
-
Izvestiya Ordena Trudovogo Krasnogo Znameni Krymskoj Astrofizicheskoj Observatorii
- Pub Date:
- 1982
- Bibcode:
- 1982IzKry..65..143E
- Keywords:
-
- Astronomical Catalogs;
- Polarimetry;
- Stellar Spectrophotometry;
- Variable Stars;
- Linear Polarization;
- Magnetic Dipoles;
- Orbital Elements;
- Stellar Luminosity;
- Stellar Magnetic Fields;
- Stellar Models;
- Temporal Resolution;
- Astronomy