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SUMMARY:Corotation torques and type I planetary migration - Paardekooper\,
  S-J (Cambridge)
DTSTART:20090819T084000Z
DTEND:20090819T090000Z
UID:TALK19499@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:In the standard picture of planet migration\, Type I migration
  is due to a linear response of the disc to the presence of a low-mass pla
 net. This mode of migration is driven by torques generated at Lindblad res
 onances\, can be alarmingly fast\, and takes all planets up to a few times
  the mass of the Earth very close to the central star. Corotation torques\
 , in the linear picture generated at corotation resonances\, were thought 
 to play only a minor role. Recent work has shown\, however\, that this sim
 ple linear model is not correct. Corotation torques are always non-linear\
 , and can be much larger than the linear estimate\, to the extent that the
 y can even dominate over the Lindblad torques\, especially when non-barotr
 opic effects are considered. I will give an overview of the current state 
 of affairs concerning the new picture that is emerging for Type I migratio
 n\, and how this may affect planet formation in general.
LOCATION:Seminar Room 1 Newton Institute
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