Gravitational lensing in the Kerr-Randers optical geometry |
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Authors: | M C Werner |
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Institution: | 1. Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8583, Japan 2. Department of Mathematics, Duke University, Durham, NC, 27708, USA
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Abstract: | A new geometric method to determine the deflection of light in the equatorial plane of the Kerr solution is presented, whose optical geometry is a surface with a Finsler metric of Randers type. Applying the Gauss–Bonnet theorem to a suitable osculating Riemannian manifold, adapted from a construction by Naz?m, it is shown explicitly how the two leading terms of the asymptotic deflection angle of gravitational lensing can be found in this way. |
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