Frequencies and resonances around L4 in the elliptic restricted three-body problem

R. Rajnai, I. Nagy, B. Érdi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

More and more Trojan asteroids are discovered in our Solar system, suggesting that they are probably a common spinoff of planet formation and evolution. Till date we know thousands of Trojan followers of Jupiter, and Trojan asteroids and moons of other major planets have also been discovered. The large number of such celestial bodies can mean that Trojan companions to extrasolar planets may also be common. Trojan celestial bodies are examples for the Lagrangian triangular solutions of the three-body problem. In this paper, the stability of the Lagrangian point L4 is investigated in the elliptic restricted three-body problem by using Floquet's theory. Stable and unstable domains are determined in the parameter plane of the mass parameter and the eccentricity by computing the characteristic exponents. Frequencies of motion around L4 have been determined both in the stable and unstable domains, and fitting functions for the frequencies are derived depending on the mass parameter and the eccentricity. Resonances between the frequencies are studied in the whole parameter plane. It is shown that the 1:1 resonances are not restricted only to single curves but extend to the whole unstable domain. In the unstable domains, longer escape times of the test particle from the neighbourhood of L4 are related to certain resonances, but changing the parameters the same resonances may lead to faster escape.

Original languageEnglish
Pages (from-to)1988-1998
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume443
Issue number3
DOIs
Publication statusPublished - 2014

Fingerprint

three body problem
Trojan asteroids
celestial bodies
planet
eccentricity
asteroid
escape
planets
natural satellites
extrasolar planets
Jupiter (planet)
Jupiter
solar system
Moon
parameter
exponents
curves

Keywords

  • Celestial mechanics
  • Methods: analytical
  • Methods: numerical
  • Planets and satellites: dynamical evolution and stability

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Frequencies and resonances around L4 in the elliptic restricted three-body problem. / Rajnai, R.; Nagy, I.; Érdi, B.

In: Monthly Notices of the Royal Astronomical Society, Vol. 443, No. 3, 2014, p. 1988-1998.

Research output: Contribution to journalArticle

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