Physics Letters B (Dec 2016)

Aspherical photon and anti-photon surfaces

  • G.W. Gibbons,
  • C.M. Warnick

DOI
https://doi.org/10.1016/j.physletb.2016.10.033
Journal volume & issue
Vol. 763
pp. 169 – 173

Abstract

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In this note we identify photon surfaces and anti-photon surfaces in some physically interesting spacetimes, which are not spherically symmetric. All of our examples solve physically reasonable field equations, including for some cases the vacuum Einstein equations, albeit they are not asymptotically flat. Our examples include the vacuum C-metric, the Melvin solution of Einstein–Maxwell theory and generalisations including dilaton fields. The (anti-)photon surfaces are not round spheres, and the lapse function is not always constant.