Can Habitable Terrestrial Planets Co-exist With Hot Jupiters?

Details Can Habitable Terrestrial Planets Co-exist With Hot Jupiters? Can Habitable Terrestrial Planets Co-exist With Hot Jupiters?

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p32a..03l&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #P32A-03

Physics

8125 Evolution Of The Earth, 5455 Origin And Evolution, 5749 Origin And Evolution, 6040 Origin And Evolution, 1060 Planetary Geochemistry (5405, 5410, 5704, 5709, 6005, 6008)

Scientific paper

``Hot jupiters,'' giant planets with orbits very close to their parent stars, are thought to most plausibly form at large orbital distances and then migrate inward via interactions with the gaseous protoplanetary disk. If a giant planet forms and migrates inward with sufficient rapidity, then terrestrial planets may form in the system. We present results of simulations of terrestrial planet formation in the presence of hot jupiters, broadly defined as having orbital radii within 0.5 AU of the parent star. We show that terrestrial planets similar to those in the Solar System can form around stars with hot jupiters, and can have water contents equal to or higher than the Earth's. For small orbital radii of hot jupiters (e.g. 0.15, 0.25 AU) potentially habitable planets can form, but for semi-major axes of 0.5 AU or greater their formation is suppressed. We show that the presence of a giant planet external to the terrestrial planet zone does not necessarily enhance the water content of the terrestrial planets, but does descrease both their formation and water delivery timescales. We speculate that asteroid belts may exist interior to the terrestrial planets in systems with hot jupiters.

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