Comparing Criteria for Circular Orbits in General Relativity

Details Comparing Criteria for Circular Orbits in General Relativity Comparing Criteria for Circular Orbits in General Relativity

2002-10-16

arxiv.org/abs/gr-qc/0210052v2

Phys.Rev. D66 (2002) 107501

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages; to appear in PRD as a Brief Report; added and corrected references

Scientific paper

10.1103/PhysRevD.66.107501

We study a simple analytic solution to Einstein's field equations describing a thin spherical shell consisting of collisionless particles in circular orbit. We then apply two independent criteria for the identification of circular orbits, which have recently been used in the numerical construction of binary black hole solutions, and find that both yield equivalent results. Our calculation illustrates these two criteria in a particularly transparent framework and provides further evidence that the deviations found in those numerical binary black hole solutions are not caused by the different criteria for circular orbits.

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