Shadow cast by a Kaluza-Klein spinning dilaton black hole

TL;DR

This paper investigates the shadow of a rotating Kaluza-Klein black hole, analyzing how its size and shape depend on parameters like charge, mass, and angular momentum, revealing differences from Kerr-Newman black holes.

Contribution

It provides a detailed analysis of the shadow characteristics of Kaluza-Klein black holes, highlighting how rotation and charge influence the shadow's size and deformation.

Findings

Shadow size increases with rotation parameter

Shadow size decreases with electric charge

Shadow is less deformed than Kerr-Newman black holes

Abstract

We examine the shadow of a rotating Kaluza-Klein black hole in Einstein gravity coupled to a Maxwell field and a dilaton. The size and the shape of the shadow depend on the mass, the charge, and the angular momentum of the compact object. For a given mass, the size increases with the rotation parameter and decreases with the electric charge. The distortion with respect to the non rotating case grows with the charge and the rotation parameter. For fixed values of these parameters, the shadow is slightly larger and less deformed than in the Kerr-Newman case.