The Large Scale Structures in the Outer Solar System: II. Resonant Dust Belts Associated With the Orbits of Four Giant Planets

Details The Large Scale Structures in the Outer Solar System: II. Resonant Dust Belts Associated With the Orbits of Four Giant Planets The Large Scale Structures in the Outer Solar System: II. Resonant Dust Belts Associated With the Orbits of Four Giant Planets

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dda....31.0104g&link_type=abstract

American Astronomical Society, DDA meeting #31, #01.04

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We present the numerical results on distribution of dust produced by real cometary sources (such as Jupiter-family comets, the Kuiper belt, and Centaur objects) as well as fictitious sources taken from our sample of simulated comets with pericenters between Jupiter and Neptune. The following processes that influence the dust particle dynamics are taken into account: 1) gravitational scattering on four giant planets; 2) planetary resonances; and 3) the Poynting-Robertson (P-R) and solar wind drags. We find that the dust distribution is highly non-uniform, with most of the dust concentrated into four belts associated with the orbits of four giant planets. Typically, a belt has a sharp rise in density on both its edges (depending on the size of particles), especially at the innermost part of the belt. We reveal a rich and sophisticated resonant structure of these belts containing families of resonant particlres and gaps. A dissipative nature of the P-R drag results in specific features of particle capture into, and evolution in, the resonances. The most remarkable part of the simulated circumsolar dust belts is Neptune's non-axisymmetric resonant belt, very dense and flat in the range of 24-67 AU. Its formation is due to the capture of dust particles into the 2:1, 3:2, and other resonances with Neptune. Based on our simulations, we expect a new, quasi-stationary dust population to exist in the belts near Jupiter and Saturn, wich is highly inclined and possesses large eccentricities. This population is basically non-resonant and is an important addition to otherwise resonant dust belts. The simulated dust is likely the main source of the zodiacal light in the outer Solar system, which will be analyzed in our futher work.

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