Shadowless rapidly rotating yet not ultraspinning Kerr-AdS${}_4$ and Kerr-Newman-AdS${}_4$ black holes

Abstract

We find that the Kerr-(Newman)-AdS${}_4$ black hole will be shadowless if its rotation parameter is larger than a critical value and the shadowless-ness may be related to the appearance of the null hypersurface caustics (NHC) both inside the Cauchy horizon and outside the event horizon for the black hole with the rotation parameter beyond the critical value. Our studies also further confirm that whether an ultraspinning black hole is super-entropic or not is unrelated to the existence of the NHC outside the event horizon.

5 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:2104.10476

References in corpus (17)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• 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
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Observation of gravitational waves from two neutron star-black hole coalescences
• Black Hole Enthalpy and an Entropy Inequality for the Thermodynamic Volume
• First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
• First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
• Are ultra-spinning Kerr-Sen-AdS${}_4$ black holes always super-entropic ?
• Notes on thermodynamics of super-entropic AdS black holes
• The correspondence between thermodynamic curvature and isoperimetric theorem from ultraspinning black hole
• Ultra-Spinning Gauged Supergravity Black Holes and their Kerr/CFT Correspondence
• Null hypersurface caustics for high dimensional superentropic black holes
• Null Hypersurface Caustics, Closed Null Curves, and Super-Entropy

Cited by in corpus (4)

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• Dimensional structure of thermodynamic topology in ultraspinning Kerr-AdS black holes