Three-dimensional Atmospheric Circulation of Hot Jupiters on Highly Eccentric Orbits

Details Three-dimensional Atmospheric Circulation of Hot Jupiters on Highly Eccentric Orbits Three-dimensional Atmospheric Circulation of Hot Jupiters on Highly Eccentric Orbits

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.5609k&link_type=abstract

American Astronomical Society, DPS meeting #42, #56.09; Bulletin of the American Astronomical Society, Vol. 42, p.1079

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Scientific paper

Of the 400 exoplanets detected to date, over one-tenth of these are on highly eccentric orbits (e> 0.5). Such scenarios lead to highly time-variable stellar heating on the giant planet, which has a large effect on its meteorology. However, little is known about the basic dynamical regime of such planets, and how it may compare to the dynamics of giant planets on more circular orbits. Therefore, we present three-dimensional atmospheric circulation models that include radiative transfer (the Substellar and Planetary Atmospheric Radiation and Circulation Model) for generic hot Jupiters over a wide range of eccentricities. We compare the atmospheric circulation of the planet when placed in highly circular (e=0) up to highly eccentric (e=0.75) orbits in synchronous and pseudo-synchronous rotation around their parent stars. In particular, we analyze the temperature structure of each of these cases, as well as the jet streams, waves, and interactions between the two that arise for each scenario. Furthermore, we discuss the observational implications and extent to which light curves and spectra of planets on highly eccentric orbits will allow their meteorological and orbital properties to be inferred. We will compare these results to real observations made on HD 80606b, a highly eccentric (e=0.96) exoplanet.

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