History of the Universe History

Черепащук, А. М.

doi:10.3367/ufne.0183.201305i.0535

Cited by 17 publications

(1 citation statement)

References 75 publications

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“…5). Many authors (including T. Shmaonov) claimed that neither in Shmaonov's entourage nor in the Soviet scientific astronomical and physical community did anyone know about the interpretation of this discovery as an evidence of the validity of the hot Universe model proposed by Gamow, see for instance, [40][41][42]. But this statement does not seem to me to be completely accurate (as it was firstly noted in [43]).…”

Section: S E Khaikin As One Of the Brightest Representative Of The Ma...mentioning

confidence: 99%

Constraints on a Tidal Charge of the Supermassive Black Hole in M87* with the EHT Observations in April 2017

Zakharov

2022

Universe

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More than two years ago the Event Horizon Telescope collaboration presented the first image reconstruction around the shadow for the supermassive black hole in M87*. It gives an opportunity to evaluate the shadow size. Recently, the Event Horizon Telescope collaboration constrained parameters (“charges”) of spherical symmetrical metrics of black holes from an estimated allowed interval for shadow radius from observations of M87* in 2017. Earlier, analytical expressions for the shadow radius as a function of charge (including a tidal one) in the case of Reissner–Nordström metric have been obtained. Some time ago, Bin-Nun proposed to apply a Reissner–Nordström metric with a tidal charge as an alternative to the Schwarzschild metric in Sgr A*. If we assume that a Reissner–Nordström black hole with a tidal charge exists in M87*, therefore, based on results of the shadow size evaluation for M87* done by the Event Horizon Telescope collaboration we constrain a tidal charge. Similarly, we evaluate a tidal charge from shadow size estimates for Sgr A*.

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Section: S E Khaikin As One Of the Brightest Representative Of The Ma...mentioning

confidence: 99%