A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion

Details A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion

2010-07-28

arxiv.org/abs/1007.4964v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

12 pages, 8 figures, accepted for publication in MNRAS

Scientific paper

We study the effects of diffusion on the non-linear corotation torque, or horseshoe drag, in the two-dimensional limit, focusing on low-mass planets for which the width of the horseshoe region is much smaller than the scale height of the disc. In the absence of diffusion, the non-linear corotation torque saturates, leaving only the Lindblad torque. Diffusion of heat and momentum can act to sustain the corotation torque. In the limit of very strong diffusion, the linear corotation torque is recovered. For the case of thermal diffusion, this limit corresponds to having a locally isothermal equation of state. We present some simple models that are able to capture the dependence of the torque on diffusive processes to within 20% of the numerical simulations.

Affiliated with

Also associated with

No associations

Rating

A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion 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 A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-74267