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Title: The Dynamical History of Chariklo and Its Rings

Abstract

Chariklo is the only small solar system body confirmed to have rings. Given the instability of its orbit, the presence of rings is surprising, and their origin remains poorly understood. In this work, we study the dynamical history of the Chariklo system by integrating almost 36,000 Chariklo clones backward in time for 1 Gyr under the influence of the Sun and the four giant planets. By recording all close encounters between the clones and planets, we investigate the likelihood that Chariklo’s rings could have survived since its capture to the Centaur population. Our results reveal that Chariklo’s orbit occupies a region of stable chaos, resulting in its orbit being marginally more stable than those of the other Centaurs. Despite this, we find that it was most likely captured to the Centaur population within the last 20 Myr, and that its orbital evolution has been continually punctuated by regular close encounters with the giant planets. The great majority (>99%) of those encounters within 1 Hill radius of the planet have only a small effect on the rings. We conclude that close encounters with giant planets have not had a significant effect on the ring structure. Encounters within the Roche limit ofmore » the giant planets are rare, making ring creation through tidal disruption unlikely.« less

Authors:
 [1]; ;  [2];  [3]
  1. Hazard Community and Technical College, Community College Drive, Hazard, KY 41701 (United States)
  2. Computational Engineering and Science Research Centre, University of Southern Queensland, West Street, Toowoomba, QLD 4350 (Australia)
  3. Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22663630
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 153; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTEROIDS; CHAOS THEORY; ORBITS; ORIGIN; PLANETS; RINGS; SATELLITES; SOLAR SYSTEM; STABILITY; SUN

Citation Formats

Wood, Jeremy, Horner, Jonti, Marsden, Stephen C., and Hinse, Tobias C., E-mail: jeremy.wood@kctcs.edu. The Dynamical History of Chariklo and Its Rings. United States: N. p., 2017. Web. doi:10.3847/1538-3881/AA6981.
Wood, Jeremy, Horner, Jonti, Marsden, Stephen C., & Hinse, Tobias C., E-mail: jeremy.wood@kctcs.edu. The Dynamical History of Chariklo and Its Rings. United States. doi:10.3847/1538-3881/AA6981.
Wood, Jeremy, Horner, Jonti, Marsden, Stephen C., and Hinse, Tobias C., E-mail: jeremy.wood@kctcs.edu. Thu . "The Dynamical History of Chariklo and Its Rings". United States. doi:10.3847/1538-3881/AA6981.
@article{osti_22663630,
title = {The Dynamical History of Chariklo and Its Rings},
author = {Wood, Jeremy and Horner, Jonti and Marsden, Stephen C. and Hinse, Tobias C., E-mail: jeremy.wood@kctcs.edu},
abstractNote = {Chariklo is the only small solar system body confirmed to have rings. Given the instability of its orbit, the presence of rings is surprising, and their origin remains poorly understood. In this work, we study the dynamical history of the Chariklo system by integrating almost 36,000 Chariklo clones backward in time for 1 Gyr under the influence of the Sun and the four giant planets. By recording all close encounters between the clones and planets, we investigate the likelihood that Chariklo’s rings could have survived since its capture to the Centaur population. Our results reveal that Chariklo’s orbit occupies a region of stable chaos, resulting in its orbit being marginally more stable than those of the other Centaurs. Despite this, we find that it was most likely captured to the Centaur population within the last 20 Myr, and that its orbital evolution has been continually punctuated by regular close encounters with the giant planets. The great majority (>99%) of those encounters within 1 Hill radius of the planet have only a small effect on the rings. We conclude that close encounters with giant planets have not had a significant effect on the ring structure. Encounters within the Roche limit of the giant planets are rare, making ring creation through tidal disruption unlikely.},
doi = {10.3847/1538-3881/AA6981},
journal = {Astronomical Journal (Online)},
number = 6,
volume = 153,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}
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