Inflating Hot Jupiters with Ohmic Dissipation

Details Inflating Hot Jupiters with Ohmic Dissipation Inflating Hot Jupiters with Ohmic Dissipation

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21631105b&link_type=abstract

American Astronomical Society, AAS Meeting #216, #311.05; Bulletin of the American Astronomical Society, Vol. 41, p.886

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We present a new, magnetohydrodynamic mechanism for inflation of close-in giant extrasolar planets. The idea behind the mechanism is that current, which is induced through interaction of atmospheric winds and the planetary magnetic field, results in significant Ohmic dissipation of energy in the interior. We develop an analytical model for computation of interior Ohmic dissipation, with a simplified treatment of the atmosphere. With conservative assumptions for wind speed and field strength, our model predicts a generated power that appears to be large enough to maintain the transit radii, opening an unexplored avenue towards solving a decade-old puzzle of extrasolar gas giant radius anomalies.

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