A Rotating Incompressible Perfect Fluid Space-time as Source for the nut Metric

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

A rigidly rotating incompressible perfect fluid solution of the Einstein's gravitational equations is given. The Petrov type is D and the metric admits a four-parameter isometry group. The Gaussian curvature of the instantaneous constant-pressure surfaces is positive and they have two ring-shaped cusps. The perfect fluid solution is matched along the hypersurfaces of vanishing pressure with the stationary region of the Taub-NUT space-time, thus the interpretation as the core for a negative mass NUT metric is immediate. The matching procedure leaves one parameter in the global solution.

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