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Transforming Gas Giant Planets into Smaller Objects Through Tidal Disruption

Published online by Cambridge University Press:  29 April 2014

Shang-Fei Liu ,
James Guillochon ,
Douglas N. C. Lin  and
Enrico Ramirez-Ruiz
Shang-Fei Liu*
Affiliation:
Dept. of Astronomy and Kavli Institute for Astronomy & Astrophysics, Peking University, Beijing 100871, China
James Guillochon
Affiliation:
Dept. of Astronomy & Astrophysics, University of California, Santa Cruz, CA 95064, U.S.A.
Douglas N. C. Lin
Affiliation:
Dept. of Astronomy and Kavli Institute for Astronomy & Astrophysics, Peking University, Beijing 100871, China Dept. of Astronomy & Astrophysics, University of California, Santa Cruz, CA 95064, U.S.A.
Enrico Ramirez-Ruiz
Affiliation:
Dept. of Astronomy & Astrophysics, University of California, Santa Cruz, CA 95064, U.S.A.
*
*email: [email protected]
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Abstract

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Recent observations have revealed several Jupiter-mass planets with highly eccentric and / or misaligned orbits, which clearly suggests that dynamical processes operated in these systems. These dynamical processes may result in close encounters between Jupiter-like planets and their host stars. Using three-dimensional hydrodynamical simulations, we find that planets with cores are more likely to be retained by their host stars in contrast with previous studies which suggested that coreless planets are often ejected. We propose that after a long term evolution some gas giant planets could be transformed into super-Earths or Neptune-like planets, which is supported by our adiabatic evolution models. Finally, we analyze the orbits and structure of known planets and Kepler candidates and find that our model is capable of producing some of the shortest-period objects.

Keywords

Tidal disruptionhot Jupiterssuper-Earthsplanetary structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S293: Formation, Detection, and Characterization of Extrasolar Habitable Planets , August 2012 , pp. 356 - 361
Copyright
Copyright © International Astronomical Union 2014 

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