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The emission positions of kHz QPOs and Kerr spacetime influence 被引量:1

The emission positions of kHz QPOs and Kerr spacetime influence
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摘要 Based the Alfven wave oscillation model(AWOM) and relativistic precession model(RPM) for twin kHz QPOs,we estimate the emission positions of most detected kHz QPOs to be at r=18+/-3 km(R/15 km),except Cir X-1 at r-30+/-5 km(R/15 km).For the proposed Keplerian frequency as an upper limit to kHz QPO,the spin effects in Kerr Spacetime are discussed,which have about a 5%(2%) modification for that of the Schwarzchild case for the spin frequency of 1000(400) Hz.The application to the four typical QPO sources,Cir X-1,Sco X-1,SAX J1808.4-3658 and XTE 1807-294,is mentioned. Based the Alfven wave oscillation model(AWOM) and relativistic precession model(RPM) for twin kHz QPOs,we estimate the emission positions of most detected kHz QPOs to be at r=18+/-3 km(R/15 km),except Cir X-1 at r-30+/-5 km(R/15 km).For the proposed Keplerian frequency as an upper limit to kHz QPO,the spin effects in Kerr Spacetime are discussed,which have about a 5%(2%) modification for that of the Schwarzchild case for the spin frequency of 1000(400) Hz.The application to the four typical QPO sources,Cir X-1,Sco X-1,SAX J1808.4-3658 and XTE 1807-294,is mentioned.
出处 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2010年第S1期114-116,共3页 中国科学:物理学、力学、天文学(英文版)
基金 supported by the National Basic Research Program of China (Grant No. 2009CB824800) the National Natural Science Foundation of China (Grant No. 10773017)
关键词 KHZ QPO neutron star LOW-MASS X-ray BINARIES kHz QPO neutron star low-mass X-ray binaries
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