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Runaway migration in a multiple-protoplanet system

Published online by Cambridge University Press:  01 October 2007

Hui Zhang  and
Ji-Lin Zhou
Hui Zhang
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, China
Ji-Lin Zhou
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, China
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Abstract

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We investigate the migration of two giant planets embedded in a proto-stellar disk. The inner planet(initially located at R10=1) is of 1 Jupiter mass and the outer one(R20=1.5) is of 1 Saturn mass. We find that due to the existence of the inner massive planet, the outer planet can not open a clear gap. Instead of an inward migration and being captured by the mean motion resonance of the inner planet, the outer planet undergoes an outward runaway migration. We conclude that this runaway migration is caused by the co-rotation torque in the co-orbital region of the outer planet and sustained by the wave(flow) driven by the inner massive planet.

Keywords

Exoplanetmultiple planetsmigrationrunaway migration
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S249: Exoplanets: Detection, Formation and Dynamics , October 2007 , pp. 413 - 418
Copyright
Copyright © International Astronomical Union 2008

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