Absorption of Waves in Accretion Disks. II. Resonance at the Height Where Wave Frequency Matches the Epicyclic Frequency

Details Absorption of Waves in Accretion Disks. II. Resonance at the Height Where Wave Frequency Matches the Epicyclic Frequency Absorption of Waves in Accretion Disks. II. Resonance at the Height Where Wave Frequency Matches the Epicyclic Frequency

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..653h&link_type=abstract

Publications of the Astronomical Society of Japan, v.47, p.653-660.

Astronomy and Astrophysics

Astronomy

Accretion Disks, Hydrodynamics, X-Rays: Binaries

Scientific paper

We consider axisymmetric, adiabatic, and inviscid oscillations of a disk rotating around a compact object. Assuming the wavelength in the radial direction to be short compared with the typical length scale in the radial direction, we find that low-frequency waves propagating vertically are resonantly absorbed at the height where the wave frequency omega matches the epicyclic frequency kappa . As an example, we consider a weakly isentropic disk having coronae. In the equatorial cool region of the disk, low-frequency waves with omega < kappa are transmissive. Above and below the equatorial cool disk, there are supposed to be hot coronae which are nearly non-rotating (kappa ~ 0). In the coronae, low-frequency waves are no longer transmissive, because their frequency omega exceeds kappa . In the transition layer located between the equatorial cool disk and either of the coronae, there is a surface where omega matches kappa . We give a mathematical proof that waves are absorbed at this surface. Some implications of this result with respect to the time variabilities observed from X-ray stars are briefly discussed.

Affiliated with

Also associated with

No associations

Rating

Absorption of Waves in Accretion Disks. II. Resonance at the Height Where Wave Frequency Matches the Epicyclic Frequency 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 Absorption of Waves in Accretion Disks. II. Resonance at the Height Where Wave Frequency Matches the Epicyclic Frequency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absorption of Waves in Accretion Disks. II. Resonance at the Height Where Wave Frequency Matches the Epicyclic Frequency will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1356456