Meridional circulation in rotating stars. V - Cooling white dwarfs

Details Meridional circulation in rotating stars. V - Cooling white dwarfs Meridional circulation in rotating stars. V - Cooling white dwarfs

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...267..334t&link_type=abstract

Astrophysical Journal, Part 1, vol. 267, Apr. 1, 1983, p. 334-339.

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21

Hydrodynamics, Meridional Flow, Stellar Rotation, Stellar Temperature, White Dwarf Stars, Atmospheric Circulation, Boundary Conditions, Boundary Value Problems, Computational Fluid Dynamics, Flow Velocity, Stellar Atmospheres, Stellar Envelopes, Turbulent Boundary Layer

Scientific paper

The large-scale meridional circulation and concomitant differential rotation in a cooling white dwarf that does not greatly depart from spherical symmetry are discussed. It is found that the circulation velocities are utterly negligible in the degenerate interior as well as in the thin nondegenerate envelope, where the presence of a (turbulent) viscous boundary layer allows the velocity to satisfy all of the surface boundary conditions. There are no 1/rho singularities in the meridional flow. The back reaction of the circulatory currents on the overall rotation rate is not very large either, thus implying at most a mild differential rotation when departure from sphericity is small.

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