Superentropic AdS Black Hole Shadows

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.

Latex, 16 pages, 7 figures. Accepted for publication in PLB(2021)

References in corpus (8)

• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• Measurement of the Kerr Spin Parameter by Observation of a Compact Object's Shadow
• QED Effect on Black Hole Shadow
• Are ultra-spinning Kerr-Sen-AdS${}_4$ black holes always super-entropic ?
• Notes on thermodynamics of super-entropic AdS black holes
• On the approximation of the black hole shadow with a simple polar curve

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• Deflection angle and shadow of the Reissner-Nordström black hole with higher-order magnetic correction in Einstein-nonlinear-Maxwell fields
• Shadow and Photon Sphere of Black Hole in Clouds of Strings and Quintessence
• Effects of Born-Infeld electrodynamics on black hole shadows
• Signatures of the accelerating black holes with a cosmological constant from the ${\text{Sgr A}}^{\star }$ and ${\text{M87}}^{\star }$ shadow prospects
• Light Deflection Angle by Superentropic Black Holes
• Shadow thermodynamics of non-linear charged Anti-de Sitter black holes
• Optical Shadows of Rotating Bardeen AdS Black Holes
• Superentropic Black Hole Shadows in Arbitrary Dimensions
• Constructing Regular Lovelock Black Holes with degenerate vacuum and $\Lambda <0$, using the gravitational tension. Shadow analysis
• Dimensional structure of thermodynamic topology in ultraspinning Kerr-AdS black holes