Asymptotic expansions of the Cotton-York tensor on slices of stationary spacetimes

Details Asymptotic expansions of the Cotton-York tensor on slices of stationary spacetimes Asymptotic expansions of the Cotton-York tensor on slices of stationary spacetimes

2004-02-05

arxiv.org/abs/gr-qc/0402033v2

Class.Quant.Grav. 21 (2004) 3237-3250

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Revised version to appear in Class. Quantum Grav. with 13 pages. Section 2 regarding multipolar expansions of stationary space

Scientific paper

10.1088/0264-9381/21/13/009

We discuss expansions for the Cotton-York tensor near infinity for arbitrary slices of stationary spacetimes. From these expansions it follows directly that a necessary condition for the existence of conformally flat slices in stationary solutions is the vanishing of a certain quantity of quadrupolar nature (obstruction). The obstruction is nonzero for the Kerr solution. Thus, the Kerr metric admits no conformally flat slices. An analysis of higher orders in the expansions of the Cotton-York tensor for solutions such that the obstruction vanishes suggests that the only stationary solution admitting conformally flat slices are the Schwarzschild family of solutions.

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