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| Paper: |
Effects of the Smoothing Factor in the Potential of a Protoplanet |
| Volume: |
294, Scientific Frontiers in Research on Extrasolar Planets |
| Page: |
339 |
| Authors: |
Koller, J.; Li, H. |
| Abstract: |
We study the nonlinear evolution of an inviscid gaseous disk with a protoplanet on a fixed circular orbit using 2D hydro simulations. We find that flow dynamics in the co-orbital region depend sensitively on the smoothing factor adopted in the protoplanet's potential. Besides the mixing and flattening of the potential vorticity profile through the co-orbital region, we observe the production of isolated vortices out of the protoplanet's Roche lobe when the smoothing length is small. These vortices are localized higher density ``blobs'' and they propagate in the co-orbital region. They also impart significant torques on the protoplanet, both in magnitude and time variation. |
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