KLEY , W.

International audience

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Astronomy and Astrophysics, 502, pp. 679-693 (2009)

International audience

We study the torque on low-mass planets embedded in protoplanetary discs in the twodimensional approximation, incorporating non-isothermal effects. We couple linear estimates of the Lindblad (or wave) torque to a simple, but non-linear, model of adiabatic corotation torques (or horseshoe drag), resulting in a simple formula that governs type I...

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Context. Type-II migration of giant planets has a speed proportional to the disc's viscosity for values of the α viscosity parameter larger than 10−4. Previous studies based on two-dimensional simulations, have shown that, at even lower viscosities, migration can be very chaotic and is often characterised by phases of fast migration. The reason...

International audience