QPOs and preferred variability timescales in X-ray pulsars.
Abstract
In binary systems containing an X-ray pulsar, the X-ray flux shows aperiodic noise components in addition to the neutron star rotation signal. In the power spectra of their light curves, the noise variability appears in the form of continuum components underlying the discrete peaks arising from the coherent periodic signals. The study of these continuum components can add to our knowledge of accretion processes onto magnetized neutron stars; models for quasi-periodic oscillations (QPOs) which require the presence of a rotating magnetosphere interacting with an accretion disk can be tested (see, e.g., Lamb 1988). The authors report here on the timing analysis of the EXOSAT data of two X-ray pulsars, EXO 2030+375 and SMC X-1.
- Publication:
-
Accretion-Powered Compact Binaries
- Pub Date:
- 1990
- Bibcode:
- 1990apcb.conf...67A
- Keywords:
-
- X-Ray Pulsars: Power Spectra;
- X-Ray Pulsars: X-Ray Light Curves;
- X-Ray Pulsars: Quasi-Periodic Oscillations;
- X-Ray Pulsars: Magellanic Clouds