Linear polarization variations modulo 5.6 days in HDE 226868.
Abstract
Results are reported for observations of variations in the linear polarization in HDE 226868 (the optical counterpart of Cyg X-1) made with a photoelastic polarimeter and a U-filter. The UV linear-polarization variations, as folded on the 5.6-day orbital period, are found to have amplitudes of 0.25% and position-angle changes of 2.7 deg. These results are shown to be consistent with the geometry and phasing required by the model of the binary system.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1975
- DOI:
- 10.1086/181841
- Bibcode:
- 1975ApJ...199L..27N
- Keywords:
-
- Binary Stars;
- Polarization Characteristics;
- Ubv Spectra;
- Variable Stars;
- Light Curve;
- Optical Filters;
- Optical Polarization;
- Stellar Spectra;
- Astrophysics