On the orbital (in)stability of Trojan asteroids in the solar system

Lykawka, Patryk Sofia and Horner, Jonathan and Mueller, Thomas (2013) On the orbital (in)stability of Trojan asteroids in the solar system. Spaceguard Research, 5. pp. 13-16.


Jupiter and Neptune have currently large populations of asteroids orbiting about their L4 and L5 Lagrange points, also called Trojan asteroids. Because Trojans can evolve on stable orbits with lifetimes over Gyr, the study of these objects can provide crucial insights into the history of the solar system. We performed numerical simulations to investigate the origin and long term evolution of Trojans of the four giant planets. All giant planets were able to capture disk planetesimals as Trojans at the end of planet migration. However, only 25% and 1-5% of captured Jupiter and Neptune Trojans survived after 4 Gyr of dynamical evolution, respectively, while all captured Trojan populations of Saturn and Uranus were lost during that period. In addition, a non-negligible population of observed Trojans have been leaking out from the Trojan clouds, as evidenced by the dynamical states of (1173) Anchises (Jovian Trojan), and 2001 QR322 and 2008 LC18 (Neptunian Trojans).

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 19 Jul 2017 01:30
Last Modified: 14 Sep 2017 04:18
Uncontrolled Keywords: solar system; Jupiter; Neptune; Trojans; asteroids; planet migration
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020199 Astronomical and Space Sciences not elsewhere classified
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5199 Other physical sciences > 519999 Other physical sciences not elsewhere classified
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
URI: http://eprints.usq.edu.au/id/eprint/32747

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