Modeling of differential rotation in rapidly rotating solar-type stars
Hideyuki Hotta,Takaaki Yokoyama +1 more
TLDR
In this article, the authors investigated differential rotation in rapidly rotating solar-type stars by means of an axisymmetric mean field model that was previously applied to the sun and found that stellar rotation approaches the Taylor-Proudman state when stellar rotation is faster than so- lar rotation.Abstract:
We investigate differential rotation in rapidly rotating solar-type stars by means of an axisymmetric mean field model that was previously applied to the sun. This allows us to calculate the latitudinal entropy gradient with a rea- sonable physical basis. Our conclusions are as follows: (1) Differential rotation approaches the Taylor-Proudman state when stellar rotation is faster than so- lar rotation. (2) Entropy gradient generated by the attached subadiabatic layer beneath the convection zone becomes relatively small with a large stellar angu- lar velocity. (3) Turbulent viscosity and turbulent angular momentum transport determine the spatial difference of angular velocity $\Delta \Omega$. (4) The results of our mean field model can explain observations of stellar differential rotation.read more
Citations
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Meridional Circulation in Solar and Stellar Convection Zones
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References
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Book ChapterDOI
Chromospheric variations in main-sequence stars
TL;DR: The work described here is still in progress as discussed by the authors, hence this paper will be a brief sampling of the results to date, as well as a summary of the work described in this paper.
Journal ArticleDOI
A Babcock-Leighton Flux Transport Dynamo with Solar-like Differential Rotation
Mausumi Dikpati,P. Charbonneau +1 more
TL;DR: In this article, the authors investigate the properties of a kinematic -ux transport solar dynamo model, which is characterised by a solar-like internal diUerential rotation, a single-cell meridional -ow in the convective envelope that is directed poleward at the surface, and a magnetic diUusivity that is constant within the envelope but decreases sharply at the core-envelope interface.
Journal ArticleDOI
The Internal Rotation of the Sun
TL;DR: In this paper, a detailed observational picture has been built up of the internal rotation of our nearest star, showing that the radiative interior is found to rotate roughly uniformly, unlike the predictions of stellar evolution models, which had been that the rotation rate would depend primarily on the distance from the rotation axis.
Journal ArticleDOI
Large-Scale Dynamics of the Convection Zone and Tachocline
TL;DR: In this article, the authors review observational, theoretical, and computational investigations of global-scale dynamics in the solar interior and highlight what they have learned from them and how they may be improved.
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