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- W3100347130 abstract "We study the equivalence principle, regarded as the cornerstone of general relativity, by analyzing the deformation observable of black hole shadows. Such deformation can arise from new physics and may be expressed as a phenomenological violation of the equivalence principle. Specifically, we assume that there is an additional background vector field that couples to the photons around the supermassive black hole. This type of coupling yields impact on the way the system depends on initial conditions, and affects the black hole shadow at different wavelengths by a different amount, and therefore observations of the shadow in different wavelengths could constrain such couplings. This can be tested by future multi-band observations. Adopting a specific form of the vector field, we obtain constraints on model parameters from Event Horizon Telescope observations and measurements of gas/stellar orbits." @default.
- W3100347130 created "2020-11-23" @default.
- W3100347130 creator A5006901831 @default.
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- W3100347130 date "2020-05-13" @default.
- W3100347130 modified "2023-10-16" @default.
- W3100347130 title "Testing the equivalence principle via the shadow of black holes" @default.
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- W3100347130 doi "https://doi.org/10.1103/physrevresearch.2.023164" @default.
- W3100347130 hasPublicationYear "2020" @default.
- W3100347130 type Work @default.