Shadow cast by a rotating charged black hole in quintessential dark energy

TL;DR

This paper investigates how quintessential dark energy influences the shadow and light deflection around a Kerr-Newman black hole, revealing effects of spin, charge, and dark energy on observable phenomena.

Contribution

It provides a detailed analysis of the impact of quintessential dark energy on black hole shadows and light deflection, incorporating the effects of spin, charge, and dark energy parameters.

Findings

Black hole spin elongates the shadow along the rotational axis.

Charge reduces the size of the shadow and light deflection angle.

Quintessence parameter increases shadow radius and decreases distortion at high charge and spin.

Abstract

The existence of quintessential dark energy around a black hole has considerable consequences on its spacetime geometry. Hence, in this article, we explore its effect on horizons and the silhouette generated by a Kerr-Newman black hole in quintessential dark energy. Moreover, to analyze the deflection angle of light, we utilize the Gauss-Bonnet theorem. The obtained result demonstrates that, due to the dragging effect, the black hole spin elongates its shadow in the direction of the rotational axis, while increases the deflection angle. On the other hand, the black hole charge diminishing its shadow, as well as the angle of lights deflection. Besides, both spin and charge significantly increase the distortion effect in the black hole's shadow. The quintessence parameter \gamma, increases the shadow radius, while decreases the distortion effect at higher values of charge and spin parameters.