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Saturation of the corotation resonance in a gaseous disk

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arxiv astro-ph/0208363 v2 pith:O2ZQDRPX submitted 2002-08-20 astro-ph

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keywords corotationdiskresonancetorquegaseousstateaccountsassumes
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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.

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  1. Generating eccentricity from envelope stripping in the Radius Valley

    astro-ph.EP 2026-08 conditional novelty 7.0 of 10

    Envelope-stripping gas can act as a resonant torus that excites planetary eccentricity and widens multi-planet spacings, offering a dynamical explanation for the elevated eccentricities and widened pairs seen across t...

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