Constraints on primordial black holes

• Published in: Reports on progress in physics Vol. 84; no. 11; pp. 116902 - 116954
• Main Authors: Carr, Bernard, Kohri, Kazunori, Sendouda, Yuuiti, Yokoyama, Jun’ichi
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.11.2021
• Subjects: dark matter; early Universe; Hawking radiation; primordial black holes

We update the constraints on the fraction of the Universe that may have gone into primordial black holes (PBHs) over the mass range 10 −5 to 10 50  g. Those smaller than ∼10 15  g would have evaporated by now due to Hawking radiation, so their abundance at formation is constrained by the effects of...