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2007MNRAS.377.1324C - Mon. Not. R. Astron. Soc., 377, 1324-1336 (2007/May-3)
Cavity opening by a giant planet in a protoplanetary disc and effects on planetary migration.
CRIDA A. and MORBIDELLI A.
Abstract (from CDS):
Concerning the migration of the planet, we find that classical type II migration (with speed proportional to the viscosity of the disc) occurs only if the gap opened by the planet is deep and clean. If there is still a significant amount of gas in the gap, the migration of the planet is generally slower than the theoretical type II migration rate. In some situations, migration can be stopped or even reversed. We develop a simple model that reproduces satisfactorily the migration rate observed in the simulations, for a wide range of disc viscosities and planet masses and locations relative to the inner disc edge. Our results are relevant for extrasolar planetary systems, as they explain (a) why some hot Jupiters did not migrate all the way down to their parent stars and (b) why the outermost of a pair of resonant planets is typically the most massive one.
Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS
Journal keyword(s): accretion, accretion discs - Solar system: formation - planetary systems: formation - planetary systems: protoplanetary discs
Simbad objects: 6
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