Heavy primordial black holes from strongly clustered light black holes

Abstract

We show that heavy primordial black holes may originate from much lighter ones if the latter are strongly clustered at the time of their formation. While this population is subject to the usual constraints from late-time universe observations, its relation to the initial conditions is different from the standard scenario and provides a new mechanism to generate massive primordial black holes even in the absence of efficient accretion, opening new scenarios, e.g. for the generation of supermassive black holes.

6 pages, 2 figures. v2: matching version published in PRL

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Cited by in corpus (11)

• The Science of the Einstein Telescope
• Primordial black holes from null energy condition violation during inflation
• Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves
• Distinguishing the impact and signature of black holes from different origins in early cosmic history
• The Irrelevance of Primordial Black Hole Clustering in the LVK mass range
• Primordial Black-Hole-Based Pathways to Little Red Dots
• Revisiting primordial black holes formation from preheating instabilities: the case of Starobinsky inflation
• Clustering and Runaway Merging in a Primordial Black Hole Dominated Universe
• What happens when supercooling is terminated by curvature flipping of the effective potential?
• Smoluchowski Coagulation Equation and the Evolution of Primordial Black Hole Clusters
• The Dark Side of the Moon: Listening to Scalar-Induced Gravitational Waves