Tidal Dissipation in Convective Regions of Planets and Stars

Details Tidal Dissipation in Convective Regions of Planets and Stars Tidal Dissipation in Convective Regions of Planets and Stars

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.1005o&link_type=abstract

American Astronomical Society, ESS meeting #2, #10.05

Astronomy and Astrophysics

Astronomy

Scientific paper

I present two new sets of calculations relevant to determining the rate of tidal evolution of short-period extrasolar planetary systems from first principles. First, I calculate analytically a frequency-averaged rate of tidal dissipation in a simplified planetary model and show that it can depend strongly on the size of a solid or fluid core. Second, I investigate analytically the response of a three-dimensional fluid flow (such as convection) to tidal shear of high frequency and low amplitude. Numerical simulations by G. Lesur are used to calculate the frequency-dependent effective viscosity of turbulent convection and aspects of the analytical theory are confirmed. I discuss the application of these results to the survival of planets around late-type stars.

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