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RESEARCH PRODUCT
Black hole formation from a null fluid in extended Palatini gravity
Jesus Martinez-asencioGonzalo J. OlmoDiego Rubiera-garciasubject
PhysicsHigh Energy Physics - TheoryNuclear and High Energy PhysicsWhite holeAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)Charged black holeGeneral Relativity and Quantum CosmologyBlack holeGeneral Relativity and Quantum CosmologyClassical mechanicsHigh Energy Physics - Theory (hep-th)Rotating black holeExtremal black holeBlack braneSchwarzschild radiusMathematical physicsHawking radiationdescription
We study the formation and perturbation of black holes by null fluxes of neutral matter in a quadratic extension of General Relativity formulated a la Palatini. Working in a spherically symmetric space-time, we obtain an exact analytical solution for the metric that extends the usual Vaidya-type solution to this type of theories. We find that the resulting space-time is formally that of a Reissner-Nordstrom black hole but with an effective charge term carrying the wrong sign in front of it. This effective charge is directly related to the luminosity function of the radiation stream. When the ingoing flux vanishes, the charge term disappears and the space-time relaxes to that of a Schwarzschild black hole. We provide two examples that illustrate the formation of a black hole from Minkowski space and the perturbation by a finite pulse of radiation of an existing Schwarzschild black hole.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-09-15 |