Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gregr..14..569k&link_type=abstract
General Relativity and Gravitation, vol. 14, June 1982, p. 569-571.
Astronomy and Astrophysics
Astronomy
11
Astronomical Coordinates, Gravitational Fields, Schwarzschild Metric, Spheres, Computer Programs, Invariance, Particle Acceleration, Tensors
Scientific paper
Passage of the Schwarzschild radius is shown to be locally measurable by a sign change in a certain scalar. In the Kerr solution this scalar changes sign at the stationary limit. This is an example of the use of a coordinate-invariant method, based on the curvature tensor and a finite number of its covariant derivatives, for investigating gravitational fields.
Aman Jan E.
Karlhede Anders
Lindstrom Ulf
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