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Based on the conventional sequential-accretion paradigm, we have proposedthat, during the migration of first-born gas giants outside the orbits ofplanetary embryos, super Earth planets will form inside the 2:1 resonancelocation by sweeping of mean motion resonances (Zhou et al. 2005). In thispaper, we study the subsequent evolution of a super Earth (m_1) under theeffects of tidal dissipation and perturbation from a first-born gas giant (m_2)in an outside orbit. Secular perturbation and mean motion resonances(especially 2:1 and 5:2 resonances) between m_1 and m_2 excite the eccentricityof m_1, which causes the migration of m_1 and results in a hot super Earth. Thecalculated final location of the hot super Earth is independent of the tidalenergy dissipation factor Q'. The study of migration history of a Hot SuperEarth is useful to reveal its Q' value and to predict its final location in thepresence of one or more hot gas giants. When this investigation is applied tothe GJ876 system, it correctly reproduces the observed location of GJ876daround 0.02AU.

Migration and Final Location of Hot Super Earths in the Presence of Gas Giants