Primordial black hole evolution in two-fluid cosmology

Abstract

Several processes in the early universe might lead to the formation of primordial black holes with different masses. These black holes would interact with the cosmic plasma through accretion and emission processes. Such interactions might have affected the dynamics of the universe and generated a considerable amount of entropy. In this paper we investigate the effects of the presence of primordial black holes on the evolution of the early universe. We adopt a two-fluid cosmological model with radiation and a primordial black hole gas. The latter is modelled with different initial mass functions taking into account the available constraints over the initial primordial black hole abundances. We find that certain populations with narrow initial mass functions are capable to produce significant changes in the scale factor and the entropy.

8 pages, 7 figures. Modified to match the published version

References in corpus (4)

• GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
• Primordial Black Holes as Dark Matter
• Constraints on Primordial Black Holes with Extended Mass Functions
• Baryogenesis from Hawking Radiation

Cited by in corpus (5)

• Gravitational Wave Production right after a Primordial Black Hole Evaporation
• Evaporation of Primordial Black Holes in the Early Universe: Mass and Spin Distributions
• Redshift Effects in Particle Production from Kerr Primordial Black Holes
• Scalar spectral index in the presence of Primordial Black Holes
• Neutrino Emission and Plasma Heating from Primordial Black Holes: An Improved Approach to $N_{\mathrm{eff}}$ Constraints