CMB and BBN constraints on evaporating primordial black holes revisited
Sandeep Kumar Acharya, Rishi Khatri
Abstract
We derive new CMB anisotropy power spectrum and BBN constraints for evaporating primordial black holes by explicitly solving the electromagnetic particle cascades of emitted particles and the deposition of this emitted energy to the background baryon-photon plasma. We show that the CMB anisotropies can provide stronger constraints compared to BBN and CMB spectral distortions on black holes with masses as small as $M_{\rm BH}=1.1\times 10^{13}$g, a slightly smaller mass than what has been considered in literature until now. We also show that, with more up-to-date data on abundances of deuterium and helium-3, BBN constraints are strengthened significantly.
Topics & Concepts
PhysicsCosmic microwave backgroundAstrophysicsPrimordial black holeInflation (cosmology)Big Bang nucleosynthesisBig Bang (financial markets)PlanckCosmic background radiationAnisotropyHawking radiationAstronomyBinary black holeNucleosynthesisGravitational waveQuantum mechanicsStarsFinanceEconomicsCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsGalaxies: Formation, Evolution, Phenomena