Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..645h&link_type=abstract
Publications of the Astronomical Society of Japan, v.47, p.645-652.
Astronomy and Astrophysics
Astronomy
2
Accretion Disks, Hydrodynamics, X-Rays: Binaries
Scientific paper
The propagation properties of internal gravity waves in a rotating torus are considered. The oscillations are assumed to be axisymmetric and adiabatic. In the short-wavelength limit in the vertical direction, the gravity waves whose frequency is omega are confined in the region in which [omega -N(r)][omega -kappa (r)]<0 holds, where N and kappa are the Brunt-Vaisala frequency for vertical displacement and the epicyclic frequency, respectively, and r is the radial coordinate. We find that the gravity waves are resonantly absorbed to heat the plasma at the radius where omega equals N(r). This radius is probably located in the innermost region of the torus, where most X-rays are emitted. Some implications of this result, with respect to quasi-periodic oscillations observed from low-mass X-ray binaries, are briefly discussed.
Hirotani Kouichi
Kato Shoji
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