The shadow of regular black holes with asymptotically Minkowski core

Abstract

We investigate the shadow cast by a sort of new regular black holes which are characterized by an asymptotically Minkowski core and the Sub-Planckian curvature. Firstly, we extend the metric with spherical symmetry to the one of rotating Kerr-like black holes and derive the null geodesics with circular orbit near the horizon of the black hole, and then plot the shadow of black holes with different values of the deviation parameter. It is found that the size of the shadow shrinks with the increase of the deviation parameter, while the shape of the shadow becomes more deformed. In particular, by comparing with the shadow of Bardeen black hole and Hayward black hole with the same values of parameters, we find that in general the shadow of black holes with Minkowski core has a larger deformation than that with de Sitter core, which potentially provides a strategy to distinguish these two sorts of regular black holes with different cores by astronomical observation in future.

21 pages, 9 figures

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Cited by in corpus (11)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Regular black holes: A short topic review
• Quasinormal modes and gray-body factors of regular black holes in asymptotically safe gravity
• Quasinormal modes-shadow correspondence for rotating regular black holes
• Regular black holes with sub-Planckian curvature
• New black-to-white hole solutions with improved geometry and energy conditions
• Dynamics of null particles and shadow for general rotating black hole
• Symmetric black-to-white hole solutions with a cosmological constant
• Image of Quantum Improved Regular Kerr Black Hole and Parameter Constraints from EHT Observations
• Gravitational waveforms from periodic orbits around a novel regular black hole
• GEMS embeddings of Hayward regular black holes in massless and massive gravities