Superentropic AdS Black Hole Shadows

TL;DR

This paper investigates the unique shadow features of superentropic AdS black holes, revealing elliptical shapes and deformations, and explores the shadows of naked singularities in these exotic spacetime configurations.

Contribution

It provides a detailed analysis of black hole shadows in superentropic AdS black holes using Hamilton-Jacobi formalism, highlighting novel geometric shapes and horizonless limits.

Findings

Black hole shadows are elliptical and deformed.

Size and shape depend on mass and cosmological parameters.

Naked singularities produce distinct shadow features.

Abstract

We study shadow aspects of superentropic black holes in four dimensions. Using Hamilton-Jacobi formalism, we first get the null geodesic equations. In the celestial coordinate framework relying on fixed positions of observers, we investigate the shadow behaviors in terms of the mass and the cosmological scale variation parameters. Among others, we obtain ellipse shaped geometries contrary to usual black hole solutions. Modifying the ordinary relations describing geometrical observables, we discuss the size and the shape deformation parameters of these non-trivial geometric forms. Due to horizonless limits associated with certain mass values, we explore the shadow of the naked singularity of such black holes.