Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-11
Astrophys.J.690:1386-1392,2009
Astronomy and Astrophysics
Astrophysics
21 pages, 5 figures, accepted for publication in ApJ
Scientific paper
10.1088/0004-637X/690/2/1386
The origin of the rapid quasi-periodic variabilities observed in a number of accreting black hole X-ray binaries is not understood. It has been suggested that these variabilities are associated with diskoseismic oscillation modes of the black hole accretion disk. In particular, in a disk with no magnetic field, the so-called g-modes (inertial oscillations) can be self-trapped at the inner region of the disk due to general relativistic effects. Real accretion disks, however, are expected to be turbulent and contain appreciable magnetic fields. We show in this paper that even a weak magnetic field (with the magnetic energy much less than the thermal energy) can modify or "destroy" the self-trapping zone of disk g-modes, rendering their existence questionable in realistic black hole accretion disks. The so-called corrugation modes (c-modes) are also strongly affected when the poloidal field approaches equal-partition. On the other hand, acoustic oscillations (p-modes), which do not have vertical structure, are not affected qualitatively by the magnetic field, and therefore may survive in a turbulent, magnetic disk.
Fu Wen
Lai Dong
No associations
LandOfFree
Effects of Magnetic Fields on the Diskoseismic Modes of Accreting Black Holes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of Magnetic Fields on the Diskoseismic Modes of Accreting Black Holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of Magnetic Fields on the Diskoseismic Modes of Accreting Black Holes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-266391