Obliquity evolution of the minor satellites of Pluto and Charon

Alice C. Quillen, Fiona Nichols-Fleming, Yuan Yuan Chen, Benoît Noyelles

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

New Horizons mission observations show that the small satellites Styx, Nix, Kerberos and Hydra, of the Pluto–Charon system, have not tidally spun-down to near synchronous spin states and have high obliquities with respect to their orbit about the Pluto–Charon binary (Weaver, 2016). We use a damped mass-spring model within an N-body simulation to study spin and obliquity evolution for single spinning non-round bodies in circumbinary orbit. Simulations with tidal dissipation alone do not show strong obliquity variations from tidally induced spin-orbit resonance crossing and this we attribute to the high satellite spin rates and low orbital eccentricities. However, a tidally evolving Styx exhibits intermittent obliquity variations and episodes of tumbling. During a previous epoch where Charon migrated away from Pluto, the minor satellites could have been trapped in orbital mean motion inclination resonances. An outward migrating Charon induces large variations in Nix and Styx's obliquities. The cause is a commensurability between the mean motion resonance frequency and the spin precession rate of the spinning body. As the minor satellites are near mean motion resonances, this mechanism could have lifted the obliquities of all four minor satellites. The high obliquities need not be primordial if the minor satellites were at one time captured into mean motion resonances.

langueAnglais
Pages94-113
Nombre de pages20
journalIcarus
Volume293
Les DOIs
étatPublié - 1 sept. 2017

Empreinte digitale

Charon
Pluto (planet)
Pluto
obliquity
Nix
orbits
metal spinning
New Horizons mission
Hydra
orbitals
eccentricity
precession
inclination
dissipation
simulation
time measurement
causes

Citer ceci

Quillen, A. C., Nichols-Fleming, F., Chen, Y. Y., & Noyelles, B. (2017). Obliquity evolution of the minor satellites of Pluto and Charon. Icarus, 293, 94-113. DOI: 10.1016/j.icarus.2017.04.012
Quillen, Alice C. ; Nichols-Fleming, Fiona ; Chen, Yuan Yuan ; Noyelles, Benoît. / Obliquity evolution of the minor satellites of Pluto and Charon. Dans: Icarus. 2017 ; Vol 293. p. 94-113
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Quillen, AC, Nichols-Fleming, F, Chen, YY & Noyelles, B 2017, 'Obliquity evolution of the minor satellites of Pluto and Charon' Icarus, VOL. 293, p. 94-113. DOI: 10.1016/j.icarus.2017.04.012

Obliquity evolution of the minor satellites of Pluto and Charon. / Quillen, Alice C.; Nichols-Fleming, Fiona; Chen, Yuan Yuan; Noyelles, Benoît.

Dans: Icarus, Vol 293, 01.09.2017, p. 94-113.

Résultats de recherche: Contribution à un journal/une revueArticle

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Quillen AC, Nichols-Fleming F, Chen YY, Noyelles B. Obliquity evolution of the minor satellites of Pluto and Charon. Icarus. 2017 sept. 1;293:94-113. Disponible �, DOI: 10.1016/j.icarus.2017.04.012