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A model of low-frequency quasi-periodic oscillations in black hole X-ray binaries
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作者 zhi-yun wang Chang-Yin Huang +1 位作者 Ding-Xiong wang Jiu-Zhou wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2012年第6期661-670,共10页
A model of low-frequency quasi-periodic oscillations (LFQPOs) of black hole X-ray binaries (BHXBs) is proposed based on the perturbed magnetohydrody- namic equations of an accretion disk. It turns out that the LFQ... A model of low-frequency quasi-periodic oscillations (LFQPOs) of black hole X-ray binaries (BHXBs) is proposed based on the perturbed magnetohydrody- namic equations of an accretion disk. It turns out that the LFQPO frequencies of some BHXBs can be fitted by the frequencies of the toroidal Alfv6n wave oscillation cor- responding to the maximal radiation flux. In addition, the positive correlation of the LFQPO frequencies with the radiation flux from an accretion disk is well interpreted. 展开更多
关键词 ACCRETION accretion disks -- black hole physics -- magnetic fields --stars: individual (XTE J1550-564 GRO J1655--40)
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A magnetic reconnection model for quasi-periodic oscillations in black hole systems
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作者 Chang-Yin Huang Ding-Xiong wang +1 位作者 Jiu-Zhou wang zhi-yun wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2013年第6期705-718,共14页
The quasi-periodic oscillations (QPOs) in black hole (BH) systems with different scales are interpreted based on the magnetic reconnection of large-scale mag- netic fields generated by toroidal electric currents f... The quasi-periodic oscillations (QPOs) in black hole (BH) systems with different scales are interpreted based on the magnetic reconnection of large-scale mag- netic fields generated by toroidal electric currents flowing in the inner region of the accretion disk, where the current density is assumed to be proportional to the mass density of the accreting plasma. The magnetic connection (MC) is taken into account in resolving dynamic equations describing the accretion disk, in which the MC be- tween the inner and outer disk regions, between the plunging region and the disk, and between the BH horizon and the disk are involved. It turns out that a single QPO frequency associated with several BH systems with different scales can be fitted by in- voking the magnetic reconnection due to the MC between the inner and outer regions of the disk, including the BH binaries XTE J1859+226, XTE J1650-500 and GRS 1915+105 and the massive BHs in NGC 5408 X-1 and RE J1034+396. In addition, the X-ray spectra corresponding to the QPOs for these sources are fitted based on the typical disk-corona model. 展开更多
关键词 accretion accretion disks -- black hole physics -- magnetic fields --stars individual (XTE J1859+226 XTE J1650-500 GRS 1915+105) -- galaxies:individual (NGC 5408 RE J1034+396)
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