Dynamical friction: effect of chaotic orbits

Details Dynamical friction: effect of chaotic orbits Dynamical friction: effect of chaotic orbits

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998larm.confe.107c&link_type=abstract

"IX Latin American Regional IAU Meeting, "Focal Points in Latin American Astronomy", held in Tonantzintla, Mexico, Nov 9-13, 199

Astronomy and Astrophysics

Astronomy

Scientific paper

We use numerical experiments to investigate the orbital decay, caused by dynamical friction, of a rigid satellite which moves within a larger stellar system (a galaxy); the self gravity of the particles that make up the galaxy is neglected. We study the influence on dynamical friction of chaotic orbits, present in non-integrable systems. Previous studies suggest that the presence of these orbits could enhance the effect of the dynamical friction; our goal is to verify this hypothesis, since, as much as we know, there are not simulations of this kind made by other authors. The influence of chaos is studied considering pairs of comparable models (similar density distributions) with different percentages of regular and chaotic orbits. For this purpose, we consider a Satoh modified potential to represent the galaxy, that is allowed to move on a circular orbit in a logarithmic potential; the rotation induces the appearence of chaotic orbits.

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