The highest frequency kHz QPOs in neutron star low-mass X-ray binaries
نویسندگان
چکیده
منابع مشابه
The Beat-Frequency Interpretation of Kilohertz QPOs in Neutron Star Low-Mass X-ray Binaries
Pairs of quasi-periodic oscillations (QPOs) at kilohertz frequencies are a common phenomenon in several neutron-star low-mass X-ray binaries. The frequency separation of the QPO peaks in the pair appears to be constant in many sources and directly related to the neutron star spin frequency. However, in Sco X-1 and possibly in 4U 1608−52, the frequency separation of the QPOs decreases with incre...
متن کاملSONIC-POINT MODEL FOR HIGH-FREQUENCY QPOs IN NEUTRON STAR LOW-MASS X-RAY BINARIES
Quasi-periodic brightness oscillations (QPOs) with frequencies in the range 300– 1200 Hz have been detected from at least nine neutron star low-mass X-ray binaries. Here we summarize the sonic-point model for these brightness oscillations, which we present in detail elsewhere. If the sonic-point interpretation of kilohertz QPOs is confirmed, measurements of kilohertz QPO frequencies in low-mass...
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We investigate the suggestion that the frequencies of the kilohertz and other QPOs in the emission from neutron stars in low-mass X-ray binaries are generated by geodesic motion of gas clumps around the star. First we assume, following previous work, that the dominant frequencies produced by such motions are the azimuthal frequency ν K , the apsidal precession frequency ν AP , and the first ove...
متن کاملOn the kHz QPO frequency correlations in bright neutron star X-ray binaries
We re-examine the correlation between the frequencies of upper and lower kHz quasiperiodic oscillations (QPO) in bright neutron-star low-mass X-ray binaries. By including the kHz QPO frequencies of the X-ray binary Cir X-1 and two accreting millisecond pulsars in our sample, we show that the full sample does not support the class of theoretical models based on a single resonance, while models b...
متن کاملPrecession of Magnetically Driven Warped Disks and Low-Frequency QPOs in Low-Mass X-Ray Binaries
An accretion disk around a rotating magnetized star is subjected to magnetic torques which induce disk warping and precession. These torques arise generically from interactions between the stellar field and the induced surface currents on the disk. Applying these new effects to weakly magnetized (B ∼ 107-109 G) neutron stars in low-mass X-ray binaries, we study the global hydrodynamical warping...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2018
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/sty1404