Other
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dda....40.0305a&link_type=abstract
American Astronomical Society, DDA meeting #40, #3.05; Bulletin of the American Astronomical Society, Vol. 41, p.897
Other
Scientific paper
We present the results of numerical simulations of particles lying in the recently-discovered arcs and rings associated with Anthe, Methone and Pallene. These small Saturnian satellites reside between the orbits of Mimas and Enceladus, and are resonantly confined by these satellites. Recent images from Cassini have shown arcs associated with the moons Anthe and Methone and an inclined ring associated with Pallene (Hedman et al. 2009). Mimas confines Anthe in an 11:10 co-rotation resonance and Methone in both the 15:14 Lindbad resonance and the 15:14 co-rotation eccentricity resonance with Mimas (Hedman et al. 2009). Previous work (Spitale et al. 2006) had found that Pallene was in a third-order resonance with Enceladus. We present the correct resonant argument of this 19:16 resonance. The stronger first-order resonances occupied by Anthe and Methone are able to constrain the particles in longitude. On the other hand, the weaker third-order resonance affecting the orbit of Pallene cannot maintain an arc.
Our simulations using SWIFT and RK7 routines for a period or 25 years show that the arcs and ring, which are made of small dust particles, exhibit complex dynamics around their moons and in their orbits. They share the main resonances that their parent moons are in. They are also in nearby resonances. Our simulation results include the gravity of Saturn and six major Saturnian moons, Saturn's oblateness and non-gravitational forces.
Agarwal Manish
Burns Jason
Hedman Matthew M.
Tiscareno Matthew
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