Aug 12 – 13, 2026
Laurentian University
Canada/Eastern timezone

Primordial Black Hole-Induced Radiative Suppression of H2 for Direct Collapse Supermassive Black Hole Formation

Aug 13, 2026, 11:24 AM
12m
C-203 (Laurentian University)

C-203

Laurentian University

Session VI Presentations

Speaker

Kayla Payne (Queen's University)

Description

In order for gas clouds in the early universe to undergo direct collapse, cooling via H2 must be suppressed. We are exploring the effect of the Hawking radiation from small PBHs by computing the expected photon spectrum from black hole evaporation and its effect on supporting H2 suppression in a surrounding gas cloud. Our goal is to determine the density and mass distribution of PBHs needed to generate a photon flux in the low UV/Gamma range that would enable direct collapse of the gas cloud into a SMBH seed at redshifts consistent with the James Webb Space Telescope’s Little Red Dot observations.

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Author

Kayla Payne (Queen's University)

Presentation materials