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[11.07] Saturation of the Corotation Resonance in a Gaseous Disk

S.H. Lubow (STScI), G.I. Ogilvie (IoA)

We semi-analytically determine the torque exerted in a steady state by an external potential on a three-dimensional gaseous, viscous disk at a non-coorbital corotation resonance. We take into account the nonlinear feedback of the torque on the surface density and vorticity in the corotation region. The ratio of the torque to the value given by the formula of Goldreich and Tremaine depends essentially on a single dimensionless parameter, which quantifies the extent to which the resonance is saturated. The results have implications for the eccentricity evolution of young planets. We acknowledge support from NASA grant NAG5-10732.

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Bulletin of the American Astronomical Society, 35 #4
© 2003. The American Astronomical Soceity.