APT2 - Extreme Properties of Neutron Stars Observations and Theory |
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Speaker |
Zhang, Chengmin |
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Talk Title |
kHz QPOs and their relations to spin frequencies of neutorn stars |
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Abstract |
The correlations between spin frequencies and kilohertz quasi-periodic oscillations (kHz QPOs) in neutron star low mass X-ray binaries are discussed. Some kHz QPO models are mentioned. The updated data of kHz QPOs and spin frequencies are statistically analyzed. We also found that the average kHz QPO peak separation in 6 Atoll sources anti-correlates with the spin frequency in the form of inverse relation. If we shifted this correlation in the direction of the peak separation by a factor of 1.5, this correlation matches the data points of the two accretion powered millisecond X-ray pulsars, SAX J1808.4-3658 and XTE J1807-294. |
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