Shadow of a Kaluza-Klein rotating dilaton black hole

TL;DR

This paper analyzes the shadow of a rotating Kaluza-Klein black hole, revealing how its size and shape depend on physical parameters and comparing it to the Kerr-Newman black hole.

Contribution

It provides the first detailed study of the shadow of a Kaluza-Klein black hole in Einstein-Maxwell-dilaton gravity, highlighting differences from Kerr-Newman black holes.

Findings

Shadow size increases with charge and angular momentum.

Shadow shape is less deformed compared to Kerr-Newman black holes.

Shadow characteristics depend on mass, charge, and spin parameters.

Abstract

We study the shadow produced by a spinning 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. We find that, for fixed values of these parameters, the shadow is slightly larger and less deformed than for its Kerr-Newman counterpart.