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Explaining why the uranian satellites have equatorial prograde orbits despite the large planetary obliquity

Morbidelli, A. and Tsiganis, K. and Batygin, K. and Crida, A. and Gomes, R. (2012) Explaining why the uranian satellites have equatorial prograde orbits despite the large planetary obliquity. Icarus, 219 (2). pp. 737-740. ISSN 0019-1035. doi:10.1016/j.icarus.2012.03.025. https://resolver.caltech.edu/CaltechAUTHORS:20120711-122936061

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Abstract

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°.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.icarus.2012.03.025DOIArticle
http://www.sciencedirect.com/science/article/pii/S0019103512001182PublisherArticle
https://arxiv.org/abs/1208.4685arXivDiscussion Paper
ORCID:
AuthorORCID
Batygin, K.0000-0002-7094-7908
Additional Information:© 2012 Elsevier Inc. Received 16 November 2011; Revised 23 March 2012; Accepted 27 March 2012; Available online 3 April 2012.
Subject Keywords:Uranus; Uranus, Satellites; Satellites, Formation; Satellites, Dynamics
Issue or Number:2
DOI:10.1016/j.icarus.2012.03.025
Record Number:CaltechAUTHORS:20120711-122936061
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120711-122936061
Official Citation:A. Morbidelli, K. Tsiganis, K. Batygin, A. Crida, R. Gomes, Explaining why the uranian satellites have equatorial prograde orbits despite the large planetary obliquity, Icarus, Volume 219, Issue 2, June 2012, Pages 737-740, ISSN 0019-1035, 10.1016/j.icarus.2012.03.025. (http://www.sciencedirect.com/science/article/pii/S0019103512001182)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32354
Collection:CaltechAUTHORS
Deposited By: Aucoeur Ngo
Deposited On:11 Jul 2012 20:29
Last Modified:09 Nov 2021 21:26

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