Black holes in dRGT massive gravity with the signature of EHT observations of M87*

TL;DR

This paper analyzes the optical features and shadow of charged rotating black holes in dRGT massive gravity, comparing theoretical predictions with EHT observations of M87* to constrain model parameters.

Contribution

It introduces a rotating black hole solution in dRGT massive gravity and compares its shadow with EHT data to restrict the theory's parameters.

Findings

The shadow shape depends on the black hole's rotation and parameters.

Constraints on dRGT massive gravity parameters are derived from EHT observations.

Energy emission rates are affected by rotation and model parameters.

Abstract

The recent Event Horizon Telescope (EHT) observations of the M87* have led to a surge of interest in studying the shadow of black holes. Besides, investigation of time evolution and lifetime of black holes helps us to veto/restrict some theoretical models in gravitating systems. Motivated by such exciting properties, we study optical features of black holes, such as the shadow geometrical shape and the energy emission rate in modified gravity. We consider a charged AdS black hole in dRGT massive gravity and look for criteria to restrict the free parameters of the theory. The main goal of this paper is to compare the shadow of the mentioned black hole in a rotating case with the EHT data to obtain the allowed regions of the model parameters. Therefore, we employ the Newman-Janis algorithm to build the rotating counterpart of static solution in dRGT massive gravity. We also calculate the energy emission rate for the rotating case and discuss how the rotation factor and other parameters affect the emission of particles around the black holes.