Computer Science – Graphics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.5809m&link_type=abstract
American Astronomical Society, DPS meeting #40, #58.09; Bulletin of the American Astronomical Society, Vol. 40, p.504
Computer Science
Graphics
1
Scientific paper
We have simulated migration in cold debris disks caused by planets interacting with a planetesimal disk. Using an N-body integrator optimized for near-Keplerian motion that runs in parallel on a video graphics card, all pair-wise gravitational interactions between 104 bodies are computed. We see differences between simulations of self-gravitating disks compared to those that lack interactions between planetesimals. Namely, we note that the capture of planetesimals into mean motion resonances is reduced when interactions between the planetesimals are computed. Also, we see that variation in both the mass and number density of planetesimals residing in an initially cold disk changes the migration rate when the disk mass is both constant and non-constant. Migrations rates quickly decreased with reductions in the number of equal mass planetesimals, and shows a powerlaw trend when comparing semi-major axis and number of planetesimals or mass. Migration rates also increased according to a power law when disk mass was held constant and planetesimal mass was manipulated sufficiently to retain a Jupiter's mass worth of material regardless of number of planetesimals. We also find that the migration rate is very sensitive to the mass ratio of the disk compared to that of the migrating planet and the giant planet driving the migration.
Moore Alexander John
Quillen Alice
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