ISSN:
1572-946X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract One-armedglobal oscillations in a non-selfgravitating polytropic disk rotating around a star are investigated. The unperturbed disk is axisymmetric, geometrically thin, and extends infinitely in the radial direction keeping its thickness constant. Perturbations considered are inviscid and adiabatic. It is found that there are one-armed retrograde wave modes which are trapped in an inner region of the disk. The eignefrequency ω of the lowest order mode is given by ∣ω∣≲ΩK(r s)(z 0/r s)2, wherer s is the radius of the central star,z 0 is the half-thickness of the disk, and ΩK(r s) is the Keplerian angular frequency at the surface of the star.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00648825
Permalink