Titlebook: Regular Black Holes; Towards a New Paradi Cosimo Bambi Book 2023 The Editor(s) (if applicable) and The Author(s), under exclusive license t

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Book 2023tter and today wehave a body of observational evidence supporting theexistence of black holes in the Universe. However, generalrelativity predicts that at the center of black holes there arespacetime singularities, where predictability is lost andstandard physics breaks down. It is widely believed t

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Regular Rotating Black Holes and Solitons with the de Sitter/Phantom Interiors,sipative self-gravitating compact objects replacing naked singularities. Geometry of these objects is described by the axially symmetric metrics, obtained from spherical metrics of the Kerr-Schild class with using the Gürses-Gürsey formalism which includes the Newman-Janis algorithm. They have the i

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,Regular Black Holes Sourced by Nonlinear Electrodynamics,ty where the source of gravity is represented by nonlinear electromagnetic fields with the Lagrangian function . depending on the single invariant . or on two variables: either .(., .), where ., where . is the Hodge dual of ., or .(., .), where .. A number of no-go theorems are discussed, revealing

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Black Holes in Asymptotically Safe Gravity and Beyond,ore, even the deep quantum gravity regime, that is expected to determine the true structure of the core of black holes, is described by a spacetime metric. The essence of asymptotic safety lies in a new symmetry of the theory – quantum scale symmetry – which characterizes the short-distance regime o

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Regular Black Holes in Palatini Gravity,his framework have their field equations obtained as independent variations of the action with respect to the metric, the affine connection, and the other fields. In this Invited chapter for the edited book “Regular Black Holes: A New Paradigm of Gravitational Collapse” (Ed. C. Bambi, Springer Singa

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Singularity-Free Gravitational Collapse: From Regular Black Holes to Horizonless Objects,ion. However, it is widely expected that singularities should be generically avoided by quantum gravitational effects. Here we shall explore both the minimum requirements to avoid singularities in a gravitational collapse as well as discuss, without relying on a specific quantum gravity model, the p

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