Modelling the differential rotation of F stars

Physics – Fluid Dynamics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

4

Stars: Interiors, Stars: Rotation

Scientific paper

We model stellar differential rotation based on the mean-field theory of fluid dynamics. DR is mainly driven by Reynolds stress, which is anisotropic and has a non-diffusive component because the Coriolis force affects the convection pattern. Likewise, the convective heat transport is not strictly radial but slightly tilted towards the rotation axis, causing the polar caps to be slightly warmer than the equator. This drives a flow opposite to that caused by differential rotation and so allows the system to avoid the Taylor-Proudman state. Our model reproduces the rotation pattern in the solar convection zone and allows predictions for other stars with outer convection zones. The surface shear turns out to depend mainly on the spectral type and only weakly on the rotation rate. We present results for stars of spectral type F which show signs of very strong differential rotation in some cases. Stars just below the mass limit for outer convection zones have shallow convection zones with short convective turnover times. We find solar-type rotation and meridional flow patterns at much shorter rotation periods and horizontal shear much larger than on the solar surface, in agreement with recent observations.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Modelling the differential rotation of F stars 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 Modelling the differential rotation of F stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modelling the differential rotation of F stars will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1526645

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.