Exotic Earths: forming habitable worlds with giant planet migration.
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.
Raymond
Sean N
SN
Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309-0392, USA. raymond@lasp.colorado.edu
Mandell
Avi M
AM
Sigurdsson
Steinn
S
D055580:Astronomical Phenomena; D001256:Astronomy; D003198:Computer Simulation; D018534:Earth, Planet; D019419:Evolution, Planetary; D007501:Iron; D008433:Mathematics; D016083:Planets; D013696:Temperature; D014867:Water
D014867:Water; D007501:Iron