Baroclinic Generation of Potential Vorticity in an Embedded Planet-Disk System

Details Baroclinic Generation of Potential Vorticity in an Embedded Planet-Disk System Baroclinic Generation of Potential Vorticity in an Embedded Planet-Disk System

2008-05-20

arxiv.org/abs/0805.3009v2

IAU Symposium 249. Cambridge: Cambridge University Press, 2008, pp.407-412

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, accepted to IAU 249. Proceeding of IAU S249: Exoplanets: Detection, Formation and Dynamics, in press

Scientific paper

10.1017/S1743921308016918

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 or PV) through a Baroclinic Instability. We show that the generation of PV is very common and effective in non-barotropic disks through the Baroclinic Instability, especially within the coorbital region. Our results also complement previous work that non-axisymmetric Rossby-Wave Instabilities (RWIs, Lovelace et al. 1999) are likely to develop at local minima of PV distribution that are generated by the interaction between a planet and an inviscid barotropic disk. The development of RWIs results in non-axisymmetric density blobs, which exert stronger torques onto the planet when they move to the vicinity of the planet. Hence, large amplitude oscillations are introduced to the time behavior of the total torque acted on the planet by the disk. In current simulations, RWIs do not change the overall picture of inward orbital migration but cause 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

Baroclinic Generation of Potential Vorticity in an Embedded Planet-Disk System 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 Baroclinic Generation of Potential Vorticity in an Embedded Planet-Disk System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Baroclinic Generation of Potential Vorticity in an Embedded Planet-Disk System will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-299920