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Speaker |
Lai, Dong |
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Co-autors |
Wen Fu |
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Talk Title |
Effects of Magnetic Fields on the Diskoseismic Modes of Accreting Black Holes |
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Abstract |
Hydrodynamical disk oscillations have been invoked to explain quasi-periodic variabilities observed in a number of accreting black hole X-ray binaries and AGNs. We study how magnetic fields affect these modes. We show that even a weak (sub-thermal) magnetic field can modify or ``destroy'' the self-trapping zone of some of the (otherwise promising) disk modes (so-called g-modes), while other modes (p-modes) are more robust and may survive in a turbulent, magnetic disk. We also discuss some new results concerning the instabilities of magnetic, rotating flows. |
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