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The kHz QPOs of Neutron Stars and Millisecond Pulsars and Implications

Published online by Cambridge University Press:  21 February 2013

Chengmin Zhang  and
Dehua Wang
Chengmin Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Dehua Wang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
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Abstract

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The kilohertz quasi-periodic oscillations (kHz QPOs) have been found in neutron star low mass X-ray binaries (NS-LMXBs), which present the millisecond timing phenomena close to the surface of the compact objects. We briefly summarize the following contents: (1). The correlations and distributions of twin kHz QPOs; (2). The relations of high-low frequency QPOs; (3). The QPO properties of NS Atoll and Z sources; (4). No clear direct correlations between NS spins and QPOs; (5). The mechanisms of kHz QPOs; (6). The implications of kHZ QPOs, e.g., NS mass and radius, disk thickness and magnetic field of Atoll and Z source.

Keywords

Low mass X-ray binaryneutron staraccretion discs

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