Wave Optics in Spacetimes with Compact Gravitating Object
arXiv:1905.01793 · doi:10.1103/PhysRevD.100.064037
Abstract
We investigate the wave optics in spherically symmetric spacetimes: Schwarzschild black hole, spherical star with a perfect absorbing surface, and massless/massive Ellis wormholes. Assuming a point wave source, wave pattern and power spectrums for scattering waves are obtained by solving the scalar wave equation numerically. We found that the power spectrum at the observer in the forward direction shows oscillations with two characteristic periods determined by the interference effect associated with the photon sphere and the diffraction effect due to the absorbing boundary condition inside of the photon sphere.
arXiv comment24 pages, accepted version in Phys. Rev. D
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