Institute of Astronomy

Kozai-Lidov migration in stellar binaries

SpeakerTalk DateTalk Series
Cristobal Petrovich28 July 2014Across HR 2014 Posters


We study the orbital evolution of giant planets migrating by the combination of the Kozai-Lidov (KL) mechanism in stellar binaries and tidal friction from the host star. By comparing the observed semi-major distribution of hot Jupiters with our Monte Carlo simulations, we conclude KL migration can explain the observations only if: (1) tidal dissipation in the planets is at least ~150 times more efficient than that inferred from the Jupiter-Io interaction, (2) Jupiter-like planets are tidally disrupted at separations of ~0.015 AU. Finally, we place constraints on the efficiency of this mechanism to produce: hot Jupiters, collisions with the star, and tidal disruptions, and discuss how these depend on the properties of the binary companion.