Effective refractive index tensor for weak field gravity

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dc.creatorBoonserm, Petarpa
dc.creatorCattoen, Celine
dc.creatorFaber, Tristan
dc.creatorVisser, Matt
dc.creatorWeinfurtner, Silke
dc.date2004-11-08
dc.date2005-03-18
dc.date.accessioned2026-07-07T06:33:05Z
dc.date.available2026-07-07T06:33:05Z
dc.descriptionGravitational lensing in a weak but otherwise arbitrary gravitational field can be described in terms of a 3 x 3 tensor, the "effective refractive index". If the sources generating the gravitational field all have small internal fluxes, stresses, and pressures, then this tensor is automatically isotropic and the "effective refractive index" is simply a scalar that can be determined in terms of a classic result involving the Newtonian gravitational potential. In contrast if anisotropic stresses are ever important then the gravitational field acts similarly to an anisotropic crystal. We derive simple formulae for the refractive index tensor, and indicate some situations in which this will be important.
dc.descriptionV1: 8 pages, no figures, uses iopart.cls. V2: 13 pages, no figures. Significant additions and clarifications. This version to appear in Classical and Quantum Gravity
dc.identifierhttps://arxiv.org/abs/gr-qc/0411034
dc.identifierhttp://arxiv.org/abs/gr-qc/0411034
dc.identifierClass.Quant.Grav. 22 (2005) 1905-1916
dc.identifierdoi:10.1088/0264-9381/22/11/001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/99079
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.titleEffective refractive index tensor for weak field gravity
dc.typetext

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