Differential rotation of a spherical polytropic star

Details Differential rotation of a spherical polytropic star Differential rotation of a spherical polytropic star

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990maggi........3b&link_type=abstract

Magnitnaia Gidrodinamika (ISSN 0025-0015), Oct.-Dec. 1990, p. 3-9. In Russian.

Physics

Polytropic Processes, Stellar Magnetic Fields, Stellar Rotation, Electromagnetic Fields, Rigid Structures, Spherical Coordinates

Scientific paper

The problem of the motion and electromagnetic field in a rotating polytropic spherical star is considered, and it is shown that, in the case of Hphi not equal to zero, it is possible to obtain an even set of solutions. In this case, differential rotation can occur within the star but that its surface undergoes rigid-body rotation. Also considered is the case of Hphi = 0, where differential rotation of the star surface can occur. It is concluded that this rotation is unexplainable within the framework of the polytropic approximation.

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