Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.0109m&link_type=abstract
American Astronomical Society, DPS meeting #40, #1.09; Bulletin of the American Astronomical Society, Vol. 40, p.387
Astronomy and Astrophysics
Astronomy
Scientific paper
The hot Jupiter planet TrES-4 currently has a radius of 1.75 Jupiter radii, making it the largest known transiting planet. Explaining this large radius represents a theoretical challenge. Our goal is to find a self-consistent orbital and thermal evolution history of this planet that is consistent with the observed semimajor axis, eccentricity and radius. We have performed the first calculations of TrES-4's thermal evolution that incorporate the planet's tidal and orbital evolution. Tidal evolution of the planet's orbit deposits energy into the planet's interior resulting in an enlarged radius. Some previous calculations of hot Jupiter tidal evolution have ignored the change in radius of the planet, which we explicitly include here. We also investigate the future evolution of the planet and find that it may end with the planet tidally evolving into the Roche lobe of the host star and being destroyed. Our study provides constraints on the past evolution of the planet and on the present orbital and tidal parameters that can explain its current radius.
Fortney Jonathan J.
Jackson Bailey
Miller Neil
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