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No pseudosynchronous rotation for terrestrial planets and moons
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No pseudosynchronous rotation for terrestrial planets and moons
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We reexamine the popular belief that a telluric planet or satellite on an eccentric orbit can, outside a spin-orbit resonance, be captured in a quasi-static tidal equilibrium called pseudosynchronous rotation. The existence of such configurations was deduced from oversimplified tidal models assuming either a constant tidal torque or a torque linear in the tidal frequency. A more accurate treatment requires that the torque be decomposed into the Darwin-Kaula series over the tidal modes, and that this decomposition be combined with a realistic choice of rheological properties of the mantle. This development demonstrates that there exist no stable equilibrium states for solid planets and moons, other than spin-orbit resonances.
Forward citations
Cited by 1 Pith paper
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First JWST thermal phase curves of temperate terrestrial exoplanets reveal no thick atmosphere around TRAPPIST-1 b and c
First JWST phase curves of TRAPPIST-1 b and c rule out thick, heat-redistributing atmospheres; b is likely airless, c may retain a tenuous O2 atmosphere.
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