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NOTE: Explaining why the Uranian satellites have equatorial prograde orbits despite the large planetary obliquity

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arxiv 1208.4685 v1 pith:UCFZ7OYH submitted 2012-08-23 astro-ph.EP

Alessandro Morbidelli , Kleomenis Tsiganis , Konstantin Batygin , Aurelien Crida , Rodney Gomes This is my paper · ORCID
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keywords satellitesdiskequatorialplanetprogradecollisionalfactobliquity
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We show that the existence of prograde equatorial satellites is consistent with a collisional tilting scenario for Uranus. In fact, if the planet was surrounded by a proto-satellite disk at the time of the tilting and a massive ring of material was temporarily placed inside the Roche radius of the planet by the collision, the proto-satellite disk would have started to precess incoherently around the equator of the planet, up to a distance greater than that of Oberon. Collisional damping would then have collapsed it into a thin equatorial disk, from which the satellites eventually formed. The fact that the orbits of the satellites are prograde requires Uranus to have had a non-negligible initial obliquity (comparable to that of Neptune) before it was finally tilted to 98 degrees.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Accretion of Uranus and Neptune: confronting different giant impact scenarios

    astro-ph.EP 2024-12 conditional novelty 6.0 of 10

    Both the equal-mass-embryo scenario and the high-mass-ratio impact scenario form Uranus and Neptune analogues with comparable low probability (~0.1-1%), so neither is dynamically preferred.

  2. Dynamical formation of long-period exoplanets systems in evolving binary stars

    astro-ph.EP 2026-07 conditional novelty 4.0 of 10

    MESA+REBOUND simulations show that stellar mass loss in a wide binary destabilizes S-type multi-planet systems and pushes surviving giants to long-period orbits.

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