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Planet formation from planetesimals and diversity of planetary systems

Published online by Cambridge University Press:  06 January 2010

T. Montmerle ,
D. Ehrenreich ,
A.-M. Lagrange  and
S. Ida
S. Ida*
Affiliation:
Tokyo Institute of Technology, Tokyo 152-8551 I2-10, Japan
*
ida@geo.titech.ac.jp
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Abstract

Here, gravitational scattering of planetesimals(viscous stirring and dynamical friction) andtheir growth through pairwise collisions(runaway/oligarchic growth) are explained in detail.The masses of accreted protoplanets depend oninitial disk surface density and semimajor axis.When the mass of a protoplanet becomes larger than a critical valuethat is a few to ten earth masses, runaway gas accretion fromthe disk onto the planet starts.The dependence of the protoplanet massesis responsible for the diversity of extrasolar planetary systems,although orbital migrations of planetsare also important drivers to produce the diversity.

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Type
Research Article
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European Astronomical Society Publications Series , Volume 41: Physics and Astrophysics of Planetary Systems , 2010 , pp. 339 - 354
Copyright
© EAS, EDP Sciences, 2010

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