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Mimas And Enceladus Coorbitals: Where Are They?

Authors: Christou, Apostolos; M.H.M. Morais; Namouni, F.

Ref.: American Astronomical Society, DDA meeting #37, #16.03 (2006)

Abstract: Trojan companions of planetary satellites are currently known to exist for the two saturnian moons Tethys and Dione but not for nearby Mimas and Enceladus. To investigate the origin and causes of these observations, we have carried out long term numerical simulations of the saturnian satellites, both with and without tides, while we follow the evolution of an ensemble of test particles located in and around the satellites' coorbital regions. These simulations have provided vital clues on the mechanisms that help stabilise/destabilise coorbitals with the satellites Mimas, Enceladus, Tethys and Dione as well as the timescales over which these mechanisms operate. As a byproduct of this work, we have also measured the sensitivity of the Mimas-Tethys and Enceladus-Dione resonances to the integration parameters. We will discuss these results and their implications for the existence and origin of trojan satellites in the saturnian system.

URL: cdsads.u-strasbg.fr