High-frequency oscillations from CIR X-1.
Abstract
The author reports results from an EXOSAT observation of Cir X-1 during which strong, low-frequency (5-20 Hz) quasi-periodic oscillations (QPO) were detected. QPO were also detected at much higher frequencies (100-200 Hz). These high frequencies are consistent with rotation periods in the inner accretion disc region. High-frequency QPO lend weight to the idea that the low-frequency QPO peak is due to a beating between a pulsar and disc rotation frequencies. Coherent pulsations from the neutron star have not been observed.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- June 1987
- DOI:
- 10.1093/mnras/226.4.971
- Bibcode:
- 1987MNRAS.226..971T
- Keywords:
-
- Neutron Stars;
- Spaceborne Astronomy;
- Stellar Oscillations;
- Stellar Spectrophotometry;
- Variable Stars;
- X Ray Sources;
- Exosat Satellite;
- High Frequencies;
- Radiant Flux Density;
- Astrophysics