Corotational Damping of Diskoseismic C-modes in Black Hole Accretion Discs

Details Corotational Damping of Diskoseismic C-modes in Black Hole Accretion Discs Corotational Damping of Diskoseismic C-modes in Black Hole Accretion Discs

2008-10-07

arxiv.org/abs/0810.1299v3

2009, MNRAS, 393, 992-998

Astronomy and Astrophysics

Astrophysics

10 pages, 5 figures, MNRAS in press

Scientific paper

10.1111/j.1365-2966.2008.14228.x

Diskoseismic c-modes in accretion discs have been invoked to explain low-frequency variabilities observed in black-hole X-ray binaries. These modes are trapped in the inner-most region of the disc and have frequencies much lower than the rotation frequency at the disc inner radius. We show that because the trapped waves can tunnel through the evanescent barrier to the corotational wave zone, the c-modes are damped due to wave absorption at the corotation resonance. We calculate the corotational damping rates of various c-modes using the WKB approximation. The damping rate varies widely depending on the mode frequency, the black hole spin parameter and the disc sound speed, and is generally much less than 10% of the mode frequency. A sufficiently strong excitation mechanism is needed to overcome this corotational damping and make the mode observable.

Affiliated with

Also associated with

No associations

Rating

Corotational Damping of Diskoseismic C-modes in Black Hole Accretion Discs 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 Corotational Damping of Diskoseismic C-modes in Black Hole Accretion Discs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Corotational Damping of Diskoseismic C-modes in Black Hole Accretion Discs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-29182