Exotic Earths: forming habitable worlds with giant planet migration.

Science 2006 Sep;313(5792):1413-6

Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309-0392, USA.

Close-in giant planets (e.g., "hot Jupiters") are thought to form far from their host stars and migrate inward, through the terrestrial planet zone, via torques with a massive gaseous disk. Here we simulate terrestrial planet growth during and after giant planet migration. Several-Earth-mass planets also form interior to the migrating jovian planet, analogous to recently discovered "hot Earths." Very-water-rich, Earth-mass planets form from surviving material outside the giant planet's orbit, often in the habitable zone and with low orbital eccentricities. More than a third of the known systems of giant planets may harbor Earth-like planets.

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Source
http://dx.doi.org/10.1126/science.1130461DOI Listing
September 2006

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