Shadows around Sgr A* and M87* as a tool to test gravity theories

Understand

In the framework of Randall -- Sundrum theory with extra dimension Reissner -- Nordstr\"om black hole solutions with a tidal charge have been found.

• The shadow around the supermassive black hole in M87 was reconstructed in 2019 based on observations with the Event Horizon Telescope (EHT) in April 2017.
• In May 2022 the EHT Collaboration presented results of a shadow reconstruction for our Galactic Center.
• Earlier, for Reissner -- Nordstr\"om metric we derived analytical expressions for shadow size as a function of charge and later generalized these results for a tidal charge case.