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arxiv: 1107.5250 · v3 · pith:ISS5NNNUnew · submitted 2011-07-26 · 🌀 gr-qc · math-ph· math.MP

Observables for bound orbital motion in axially symmetric space-times

classification 🌀 gr-qc math-phmath.MP
keywords observablesaxiallyboundexpressionsmotionnskiorbitalspace-time
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The periastron shift and the Lense-Thirring effect of bound orbital motion in a general axially symmetric space-time given by Pleba\'nski and Demia\'nski are analyzed. We also define a measure for the conicity of the orbit and give analytic expressions for all three observables in terms of hyperelliptic integrals and Lauricella's $F_D$ function. For an interpretation of these analytical expressions, we perform a post-Schwarzschild and a post-Newton expansion of these quantities. This clearly shows the influence of the different space-time parameters on the considered observables and allows to characterize Kerr, Taub-NUT, Schwarzschild-de Sitter, or other space-times.

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