On some geometric features of the Kramer interior solution for a rotating perfect fluid

Details On some geometric features of the Kramer interior solution for a rotating perfect fluid On some geometric features of the Kramer interior solution for a rotating perfect fluid

1999-09-15

arxiv.org/abs/gr-qc/9909048v1

Class.Quant.Grav. 16 (1999) 3823-3834

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LaTeX, 15 pages with 4 Poscript figures. To be published in Classical and Quantum Gravity

Scientific paper

10.1088/0264-9381/16/12/305

Geometric features (including convexity properties) of an exact interior gravitational field due to a self-gravitating axisymmetric body of perfect fluid in stationary, rigid rotation are studied. In spite of the seemingly non-Newtonian features of the bounding surface for some rotation rates, we show, by means of a detailed analysis of the three-dimensional spatial geodesics, that the standard Newtonian convexity properties do hold. A central role is played by a family of geodesics that are introduced here, and provide a generalization of the Newtonian straight lines parallel to the axis of rotation.

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