Cosmological constant effect on charged and rotating black hole shadows
A. Belhaj, M. Benali, A. El Balali, W. El Hadri, H. El Moumni
Abstract
Motivated by recent astrophysical observations, we investigate the shadow behaviors of four-dimensional charged rotating black holes with a cosmological constant. This study is made in terms of a reduced moduli space parameterized by the charge and the rotation parameters. For fixed observers, we analyse in some details the shadow behaviors and the corresponding naked singularities of Kerr–Newman and Kerr–Sen four-dimensional black holes in Anti-de Sitter backgrounds. Then, a comparative discussion is provided by computing the geometrical observables and the energy emission rate.
Topics & Concepts
PhysicsNaked singularityBlack hole (networking)Cosmological constantGravitational singularityShadow (psychology)De Sitter universeConstant (computer programming)Rotating black holede Sitter–Schwarzschild metricCharged black holeObservableClassical mechanicsModuli spaceTheoretical physicsAngular momentumSchwarzschild radiusAstrophysicsQuantum mechanicsGeometryGravitationUniverseRouting protocolPsychologyComputer networkPsychotherapistLink-state routing protocolProgramming languageComputer scienceMathematicsRouting (electronic design automation)Astrophysical Phenomena and ObservationsBlack Holes and Theoretical PhysicsPulsars and Gravitational Waves Research