The Magneto Hydro Dynamical Model of KHz Quasi Periodic Oscillations in Neutron Star Low Mass X-ray Binaries (II)
arXiv:1406.6986 · doi:10.1088/0004-637X/791/1/16
Abstract
We study the kilohertz quasi-periodic oscillations (kHz QPOs) in neutron star low mass X-ray binaries (LMXBs) with a new magnetohydrodynamics (MHD) model, in which the compressed magnetosphere is considered. The previous MHD model (Shi \& Li 2009) is re-examined and the relation between the frequencies of the kHz QPOs and the accretion rate in LMXBs is obtained. Our result agrees with the observations of six sources (4U 0614+09, 4U 1636--53, 4U 1608--52, 4U 1915--15, 4U 1728--34, XTE 1807--294) with measured spins. In this model the kHz QPOs originate from the MHD waves in the compressed magnetosphere. The single kHz QPOs and twin kHz QPOs are produced in two different parts of the accretion disk and the boundary is close to the corotation radius. The lower QPO frequency in a frequency-accretion rate diagram is cut off at low accretion rate and the twin kHz QPOs encounter a top ceiling at high accretion rate due to the restriction of innermost stable circular orbit.
24 pages, 8 figures, 1 table. Accepted for publication in The Astrophysical Journal and tentatively scheduled for the August 10, 2014, V791 - 1 issue
References in corpus (6)
- Accretion disc viscosity: how big is alpha?
- X-ray time variability across the atoll source states of 4U 1636--53
- The coherence of kHz quasi-periodic oscillations in the X-rays from accreting neutron stars
- A model for the waveform behavior of accreting millisecond pulsars: Nearly aligned magnetic fields and moving emission regions
- Timing Features of the Accretion--driven Millisecond X-Ray Pulsar XTE J1807--294 in 2003 March Outburst
- Quasi-periodic oscillations: Resonant shear Alfv`en waves in neutron star magnetospheres
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- The influence of galaxy surface brightness on the mass-metallicity relation
- A possible explanation of the parallel tracks in kilohertz quasi-periodic oscillations from low-mass-X-ray binaries
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