Wave optics in spacetimes with compact gravitating object

Yasusada Nambu; Sousuke Noda; Yuichiro Sakai

doi:10.1103/PhysRevD.100.064037

Wave optics in spacetimes with compact gravitating object

Yasusada Nambu, Sousuke Noda, Yuichiro Sakai

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

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 patterns 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.

Original language	English
Article number	064037
Journal	Physical Review D
Volume	100
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.100.064037
Publication status	Published - Sept 20 2019
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.100.064037

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title = "Wave optics in spacetimes with compact gravitating object",

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 patterns 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.",

author = "Yasusada Nambu and Sousuke Noda and Yuichiro Sakai",

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AU - Noda, Sousuke

AU - Sakai, Yuichiro

N1 - Funding Information: Y. N. was supported in part by JSPS KAKENHI Grant No. 15K05073, and S. N. was supported by JSPS KAKENHI Grant No. 17J10770. Publisher Copyright: © 2019 American Physical Society.

PY - 2019/9/20

Y1 - 2019/9/20

N2 - 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 patterns 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.

AB - 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 patterns 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.

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Wave optics in spacetimes with compact gravitating object

Abstract

All Science Journal Classification (ASJC) codes

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