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Upper bound on the GUP parameter using the black hole shadow

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arxiv 1906.11735 v2 pith:IOYAZ2WA submitted 2019-06-27 gr-qc hep-th

classification gr-qchep-th
keywords parameterblackholeshadowboundcircularitydeviationrecent
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

An upper bound on the parameter that provides a generalized uncertainty principle (GUP) is obtained from the black hole shadow. With the aid of a recent constraint between regular black holes and the GUP parameter, it is indicated a relation between this parameter and the deviation from circularity of the black hole shadow. In the case of the recent announcement of the M87* results from the Event Horizon Telescope collaboration, a deviation from circularity $\lesssim 10\%$ imposes a GUP parameter $\beta_0 <10^{90}$.

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  1. Generalized Uncertainty Principle mimicking dynamical Dark Energy: matter perturbations and gravitational wave data analysis

    gr-qc 2025-02 reject novelty 5.0 of 10

    In a GUP-modified cosmology, matter fluctuations grow more slowly and the primordial gravitational wave spectrum is enhanced at high frequencies, leading to a claimed bound β ≲ 10^39.

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