Maximum PBH Mass and Primordiality
Abstract
In order to avoid unacceptable μ-distortions inconsistent with observational data on the Cosmic Microwave Background, Primordial Black Holes (PBHs) must be less massive than 1012 M, quite closely above the highest black hole mass yet observed. This comparableness leads us to posit that all supermassive black holes originate as PBHs.
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