Etherington’s Distance Duality with Birefringence
Jul 5, 20178 pages
Published in:
- Universe 3 (2017) 3, 52
- Published: Jul 6, 2017
e-Print:
- 1707.01261 [gr-qc]
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Abstract: (arXiv)
We consider light propagation in a spacetime whose kinematics allow weak birefringence, and whose dynamics have recently been derived by gravitational closure. Revisiting the definitions of luminosity and angular diameter distances in this setting, we present a modification of the Etherington distance duality relation in a weak gravitational field around a point mass. This provides the first concrete example of how the non-metricities implied by gravitational closure of birefringent electrodynamics affect observationally testable relations.Note:
- Invited paper for special issue `Gravitational Lensing and Astrometry' of Universe, accepted for publication
- Etherington distance duality
- modified gravity
- gravitational lensing
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