Saturation of the corotation resonance in a gaseous disk
Astrophysics
2009-11-07 v2
Abstract
We determine the torque exerted in a steady state by an external potential on a three-dimensional gaseous disk at a non-coorbital corotation resonance. Our model accounts for the feedback of the torque on the surface density and vorticity in the corotation region, and assumes that the disk has a barotropic equation of state and a nonzero effective viscosity. The ratio of the torque to the value given by the formula of Goldreich & Tremaine depends essentially on a single dimensionless parameter, which quantifies the extent to which the resonance is saturated. We discuss the implications for the eccentricity evolution of young planets.
Cite
@article{arxiv.astro-ph/0208363,
title = {Saturation of the corotation resonance in a gaseous disk},
author = {G. I. Ogilvie and S. H. Lubow},
journal= {arXiv preprint arXiv:astro-ph/0208363},
year = {2009}
}
Comments
23 pages, 1 figure, revised version, to be published in the Astrophysical Journal