Shadow of Kerr-Taub-NUT black hole

TL;DR

This paper investigates how a nonvanishing gravitomagnetic charge affects the shape and size of a Kerr-Taub-NUT black hole's shadow, revealing that it enlarges the shadow and reduces deformation compared to a standard Kerr black hole.

Contribution

It introduces the effect of gravitomagnetic charge on black hole shadows and provides numerical analysis of shadow deformation and size changes.

Findings

Gravitomagnetic charge enlarges the black hole shadow.

It reduces the shadow's deformation caused by rotation.

The study includes analysis of particle capture cross sections.

Abstract

The shadow of a rotating black hole with nonvanishing gravitomagnetic charge has been studied. It was shown that in addition to the angular momentum of black hole the gravitomagnetic charge term deforms the shape of the black hole shadow. From the numerical results we have obtained that for a given value of the rotation parameter, the presence of a gravitomagnetic charge enlarges the shadow and reduces its deformation with respect to the spacetime without gravitomagnetic charge. Finally we have studied the capture cross section for massive particles by black hole with the nonvanishing gravitomagnetic charge.