Analysis of periodic optical variability in the compact X-ray source Her X-1/HZ Herculis.
Abstract
Analysis of the large pool of optical photometric data now available on the X-ray binary Her X-1/HZ Her reveals considerable variability on a time scale of hours. These flux variations are found to repeat in a highly regular fashion over the 35d X-ray ON-OFF cycle. The frequency composition and symmetry properties of this pattern suggest that the time dependence results from the uniformly changing orientation of luminous elements in this system. Subject headings: binaries - stars: individual - X-rays: sources
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1976
- DOI:
- 10.1086/154449
- Bibcode:
- 1976ApJ...206..861D
- Keywords:
-
- Astronomical Photometry;
- Binary Stars;
- Light Curve;
- Periodic Variations;
- Pulsars;
- X Ray Sources;
- Frequency Distribution;
- Harmonic Analysis;
- Power Spectra;
- Stellar Luminosity;
- Astrophysics