Exotic Earths: Forming Habitable Worlds with Giant Planet Migration

Details Exotic Earths: Forming Habitable Worlds with Giant Planet Migration Exotic Earths: Forming Habitable Worlds with Giant Planet Migration

2006-09-08

arxiv.org/abs/astro-ph/0609253v1

Science 313 (2006) 1413

Astronomy and Astrophysics

Astrophysics

13 pages, 3 figures, 1 table. Resolution of one figure has been degraded. For full-resolution images, see http://lasp.colora

Scientific paper

10.1126/science.1130461

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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