Constraints on non-minimally coupled curved space electrodynamics from astrophysical observations

Abstract

We study interactions of electro-magnetic fields with the curvature tensor of the form $\lambda R_{\mu \nu \alpha \beta }{F}^{\mu \nu }{F}^{\alpha \beta }$. Such coupling terms though are invariant under general coordinate transformation and CPT, however violate the Einstein equivalence principle. These couplings do not cause any energy dependent dispersion of photons but they exhibit birefringence. We put constraints on the coupling constant $\lambda$ using results from solar system radar ranging experiments and millisecond-pulsar observations. We find that the most stringent constraint comes from pulsar observations and is given by $\lambda <10^{11}c{m}^2$ obtained from the timing of binary pulsar PSR B1534+12.

9 pages latex, accepted in CQG

References in corpus (7)

• Potential Sensitivity of Gamma-Ray Burster Observations to Wave Dispersion in Vacuo
• Signals for Lorentz Violation in Electrodynamics
• The Confrontation between General Relativity and Experiment
• Cosmological Constraints on Lorentz Violation in Electrodynamics
• Studies of the Relativistic Binary Pulsar PSR B1534+12: I. Timing Analysis
• Measurement of Relativistic Orbital Decay in the PSR B1534+12 Binary System
• Gravity's Rainbow: Limits for the applicability of the equivalence principle

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