Other
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2407m&link_type=abstract
American Astronomical Society, DPS meeting #42, #24.07; Bulletin of the American Astronomical Society, Vol. 42, p.958
Other
Scientific paper
The satellite system of Saturn is the only one known to have coorbital satellites. In general they are small bodies librating around the lagrangian points of a larger satellite. Dione has Helene librating around L4 and Polideuces around L5. Tethys has Calipso and Telesto around L4 and L5, respectively. There is also the pair Janus-Epimetheus with similar masses in horseshoe orbits. In these intrincated satellite systems it is also well known that there are other mean motion resonances between Enceladus and Dione and between Mimas and Tethys. In the present study we examine the necessary conditions to form coorbital satellite systems generated from disruption caused by impacts during the early age of Saturn's satellite system. We considered the following scenario: A parent satellite suffers a light collision, which remove fragments from it, generating a cloud of smaller bodies that escape from its surface. Then, a small coorbital satellite might be the outcome from the dynamical evolution of the cloud of fragments, where the mutual gravitational interactions and even collisions are taken into account. In this work, we simulated sets of fragments with a wide range of different mass and velocity distribution. The first results are given in terms of the values of these parameters in order to get temporary coorbital systems. Then, collision and/or strong interaction between fragments were considered to remove energy from the system in order to get permanent coorbital systems. Finaly, we found sets of adequate conditions in a space of initial conditions and parameters.
Cabo Winter Othon
Mourão Décio
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