On The Low Frequency Quasi Periodic Oscillations Of X-Ray Sources |
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Authors: | Email author" target="_blank">C?M?ZhangEmail author |
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Institution: | (1) National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China |
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Abstract: | Based on the interpretation of the twin kilohertz Quasi Periodic Oscillations (kHz QPOs) of X-ray spectra of Low Mass X-Ray
Binaries (LMXBs) ascribed to the Keplerian and the periastron precession frequencies at the inner disk respectively, we ascribe
the low frequency (0.1–10 Hz) Quasi Periodic Oscillations (LFQPO) and HBO (15–60 Hz QPO for Z sources or Atoll sources) to
the periastron precession at some outer disk radius. It is assumed that both radii are correlated by a scaling factor of 0.4.
The conclusions obtained include: All QPO frequencies increase with increasing accretion rate. The theoretical relations between
HBO (LFQPO) frequency and the kHz QPO frequencies are similar to the measured empirical formula. |
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Keywords: | X-rays: accretion disks stars neutron X-rays: stars |
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