Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability

Details Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability

2007-06-22

arxiv.org/abs/0706.3404v1

Astronomy and Astrophysics

Astrophysics

~ 30 pages, Ap. J. in press

Scientific paper

10.1086/521012

We use a multi-dimensional hydrodynamics code to study the gravitational interaction between an embedded planet and a protoplanetary disk with emphasis on the generation of vortensity (potential vorticity) through a Baroclinic Instability and subsequent development of Rossby-Wave-Instability (RWI). It is found that the generation of potential vorticity is very common and effective in non-barotropic disks through the Baroclinic Instability, especially within the coorbital region. Our results also complement previous studies by \citet{KLL03} that non-axisymmetric RWIs are likely to develop at local minima of potential vorticity distribution that are generated by the interaction between a planet and a inviscid barotropic disk. This second instability appears to be very common and robust, regardless of the equation of state, initial density distribution, and rotational law of the disk. The development of RWIs results in non-axisymmetric density blobs, which exert stronger torques onto the planet when they travel in the vicinity of the planet. As a result of that, large amplitude oscillations are introduced to the time behavior of the total torque acted on the planet by the disk. In our current simulations, RWIs do not change the overall picture of inward orbital migration but bring in a non-monotonic behavior to the migration speed. As a side effect, RWIs also introduce interesting structures into the disk. These structures may help the formation of Earth-like planets in the Habitable Zone or Hot Earths interior to a close-in giant planet.

Affiliated with

Also associated with

No associations

Rating

Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk-Planet Interaction Simulations: (I) Baroclinic Generation of Vortensity and Non-Axisymmetric Rossby-Wave-Instability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-177916