Primordial black holes from CDM isocurvature perturbations
Samuel Passaglia, Misao Sasaki
Abstract
We show that primordial black holes can be produced from the collapse of large isocurvature perturbations of the cold dark matter. We develop a novel procedure to compute the resulting black hole abundance by studying matched perturbations of matter-only universes, and we use our procedure to translate observational constraints on black hole abundances into model-independent constraints on cold dark matter isocurvature perturbations over a wide range of scales. The constraint on the typical amplitude of the primordial perturbations weakens slightly slower than linearly on small scales.
Topics & Concepts
PhysicsPrimordial black holeCold dark matterDark matterAmplitudeAstrophysicsBlack hole (networking)Range (aeronautics)Perturbation (astronomy)Binary black holeAstronomyGravitational waveQuantum mechanicsRouting (electronic design automation)Routing protocolMaterials scienceComposite materialComputer scienceComputer networkLink-state routing protocolCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsPulsars and Gravitational Waves Research