Effect of higher dimensions on rotating black holes shadow

Abstract

The gravitation lensing features are different for gravities with the extra dimensions, hence, there is an opportunity to find the sign of extra dimension in the supermassive black hole. In new of then, we investigate the shadow cast by the higher-dimensional rotating black hole and demonstrate the higher-dimensional effect on rotating black hole shadow. The shape and size of the higher-dimensional black hole shadow is mainly characterized by its mass parameter (M), spin parameter (a) and spacetime dimensions (D). For the increasing values of the spin parameter a and spacetime dimensions D, the effective size of the black hole shadow decreases, and the shape gets more deformed. Our study includes the shadow observables in higher dimensions with the data of M87 black hole. We also calculate the energy emission rate for the higher-dimensional rotating black hole which increases with the spacetime dimensions D.