In the radiation-hydrodynamics model,the time lag and fractional root-mean-squared(rms) amplitude as a function of emitted photon energy should show a minimum on the normal branch oscillations.This has been seen in th...In the radiation-hydrodynamics model,the time lag and fractional root-mean-squared(rms) amplitude as a function of emitted photon energy should show a minimum on the normal branch oscillations.This has been seen in the Z-sources Cyg X-2 and GX 5-1.Here,using the observations from the Rossi X-ray Timing Explorer(RXTE),we study the energy dependence of normal branch QPOs in the peculiar Z-source Cir X-1.We discuss the results in the context of radiation-hydrodynamics and the Comptonization model.展开更多
基金supported by the National Basic Research Program of China (Grant No. 2009CB824800)the National Natural Science Foundation of China (Grant No. 10773017)+1 种基金the Natural Science Foundation of Xinjiang Uygur Autonomous Region of China (Grant No. 200821164)the Program of the Light in Chinese Western Region (LCWR) (Grant No. LHXZ 200802)
文摘In the radiation-hydrodynamics model,the time lag and fractional root-mean-squared(rms) amplitude as a function of emitted photon energy should show a minimum on the normal branch oscillations.This has been seen in the Z-sources Cyg X-2 and GX 5-1.Here,using the observations from the Rossi X-ray Timing Explorer(RXTE),we study the energy dependence of normal branch QPOs in the peculiar Z-source Cir X-1.We discuss the results in the context of radiation-hydrodynamics and the Comptonization model.
