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SUMMARY:Planet scattering\, eccentricity excitation and the long-term evol
 ution of planetary systems - Ford\, E (Florida)
DTSTART:20090820T090000Z
DTEND:20090820T092000Z
UID:TALK19504@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:The discovery of extrasolar planets on eccentric orbits has mo
 tivated theoretical investigations of numerous mechanisms for exciting the
  eccentricities of giant planets during the planet formation process and s
 ubsequent orbital evolution. The orbital properties of the growing number 
 of extrasolar planetary systems and multiple planet systems are beginning 
 to provide clues that constrain planet formation models. I will discuss th
 e implications of exoplanet observations for eccentricity evolution from p
 lanet-disk interactions in young planetary systems to the chaotic evolutio
 n of multiple planet systems. I will discuss the potential role of planet 
 scattering in the formation of planets in wide orbits\, such as those rece
 ntly found around A stars. I will also discuss the implications of planet 
 scattering and secular interactions for the orbits of Neptune or super-Ear
 th-mass planets. I will conclude will speculations as to why our own solar
  system has settled to a state with nearly circular orbits.
LOCATION:Seminar Room 1 Newton Institute
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