Exploring evaporating primordial black holes with gravitational waves

Primordial black holes (PBHs) from the early Universe have been connected with the nature of dark matter and can significantly affect cosmological history. We show that coincidence dark radiation and density fluctuation gravitational wave signatures associated with evaporation of less than or similar to 10(9) g PBHs can be used to explore and obtain important hints about the formation mechanisms of spinning and non-spinning PBHs spanning orders of magnitude in mass-range, which is challenging to do otherwise. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

Primordial black holes from the early Universe can significantly affect cosmological history. Exploring the formation mechanisms of these black holes can be done through coincidental dark radiation and density fluctuation gravitational wave signatures.