Rotational evolution of solar-type stars

Details Rotational evolution of solar-type stars Rotational evolution of solar-type stars

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..79..367g&link_type=abstract

Astrophysics and Space Science, vol. 79, no. 2, Oct. 1981, p. 367-378.

Astronomy and Astrophysics

Astrophysics

6

Stellar Evolution, Stellar Rotation, Astrophysics, Euler Equations Of Motion, Polytropic Processes, Stellar Models, Sun, Torque, Viscosity

Scientific paper

The aim of the present investigation has been to consider the rotational evolution of solar-type stars simulated by a polytropic model that possesses differential rotation of Clement's type. A properly defined reduction factor moderates the effects of such a rotation. The present treatment is based upon the general Eulerian equation, governing nonuniform (i.e., nonrigid-body) rotation. Nonconservative terms, arising when the stellar wind torque is under consideration, are taken into account. Data available for the viscosity of the sun are used to construct a plausible viscosity model. Certain assumptions are made that remove the mathematical difficulties and simplify the physical ground. The obtained results are compared to corresponding estimates of recent observations.

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