Electromagnetic tail radiation in nonflat spacetimes

  • Thomas W. Noonan


The Green's function of the electromagnetic wave equation in an arbitrary space-time is expanded in geodesic coordinates in order to evaluate the tail—the part of the Green's function which does not propagate on the null cone. It is concluded that, to first order in the Riemann tensor, the tail contribution is constant. The electromagnetic power radiated from an accelerated charged particle follows the null cone, i.e., satisfies Huygens' principle, and is the same as if the Riemann tensor were zero. Electromagnetic radiation from compact sources such as neutron stars and black-hole accretion disks may suffer the usual gravitational distortions of the null cone, but none of it arrives slower than “the speed of light.”


Wave Equation Charged Particle Electromagnetic Wave Neutron Star Huygens 
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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • Thomas W. Noonan
    • 1
  1. 1.Physics DepartmentBrockport State CollegeBrockportNew York

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