On type~I planetary migration in an adiabatic disk

Details On type~I planetary migration in an adiabatic disk On type~I planetary migration in an adiabatic disk

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sf2a.conf..437b&link_type=abstract

SF2A-2007: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics held in Grenoble, France, July

Astronomy and Astrophysics

Astrophysics

Scientific paper

A low mass planet embedded in a circumplanetary disk should undergo a fast orbital decay towards the central object. This process, known as type I migration, has been extensively studied analytically and numerically, assuming that the disk is either barotropic, or described with a locally isothermal equation of state. We investigate in this communication the case of an adiabatic disk, by means of two-dimensional hydrodynamic simulations. Entropy perturbations, that are advected in the planet's coorbital region, yield an excess of corotation torque that scales with the initial entropy gradient at corotation. This excess can be large enough to slow down the migration process significantly, or even stop it.

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