On The Low Frequency Quasi Periodic Oscillations of X-ray Sources

Details On The Low Frequency Quasi Periodic Oscillations of X-ray Sources On The Low Frequency Quasi Periodic Oscillations of X-ray Sources

2001-11-22

arxiv.org/abs/astro-ph/0111435v3

Astrophys.Space Sci. 299 (2005) 203-210

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, accepted by APSS, 2004

Scientific paper

10.1007/s10509-005-5901-1

Based on the interpretation of the twin kilohertz Quasi Periodic Oscillations (kHz QPOs) of X-ray spectra of Low Mass X-Ray Binaries (LMXBs) to the Keplerian and the periastron precession frequencies at the magnetosphere-disk of X-ray neutron star (NS) respectively, we ascribe the low frequency 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. The obtained conclusions include: all QPO frequencies increase with increasing the accretion rate. The obtained theoretical relations between HBO (LFQPO) frequency and the kHz QPO frequency are similar to the measured empirical formula. Further, the possible dynamical mechanism for QPO production is discussed.

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