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- W4206635240 abstract "Considering a Schwarzschild black hole surrounded by a fully ionized hydrogen plasma, we study the refractive effect and the pure gravitational effect of the plasma on the shadow. The effects are treated in a unified formalism but characterized by two independent parameters. For semi-realistic values of parameters, we find their corrections to the shadow radius are both negligible, and the gravitational correction can overtake the refractive correction for active galactic nuclei of masses larger than $10^9M_{odot}$. Since the refractive effect is induced by the electromagnetic interaction, this result is in sharp contrast to the textbook knowledge that the ratio of the gravitational force to the electromagnetic force is $Gm_em_p/e^2=4.4times10^{-40}$ in a hydrogen atom. With unrealistically large values of parameters, we illustrate the two effects on the light trajectories and the intensity map." @default.
- W4206635240 created "2022-01-26" @default.
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- W4206635240 date "2022-01-01" @default.
- W4206635240 modified "2023-09-26" @default.
- W4206635240 title "Gravitational effect of plasma particles on the shadow of Schwarzschild black holes" @default.
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- W4206635240 doi "https://doi.org/10.1140/epjc/s10052-021-09959-z" @default.
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