Obliquity Tides on Hot Jupiters

Details Obliquity Tides on Hot Jupiters Obliquity Tides on Hot Jupiters

2005-06-20

arxiv.org/abs/astro-ph/0506468v1

Astronomy and Astrophysics

Astrophysics

To appear in ApJ Letters [9 pages, 2 figures]

Scientific paper

10.1086/432834

Obliquity tides are a potentially important source of heat for extrasolar planets on close-in orbits. Although tidal dissipation will usually reduce the obliquity to zero, a nonzero obliquity can persist if the planet is in a Cassini state, a resonance between spin precession and orbital precession. Obliquity tides might be the cause of the anomalously large size of the transiting planet HD 209458b.

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