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Breakdown of hawking evaporation opens new mass window for primordial black holes as dark matter candidate

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Thoss,  Valentin
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Burkert,  Andreas
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Thoss, V., Burkert, A., & Kohri, K. (2024). Breakdown of hawking evaporation opens new mass window for primordial black holes as dark matter candidate. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 532(1), 451-459. doi:10.1093/mnras/stae1098.


Cite as: https://hdl.handle.net/21.11116/0000-0010-6D8F-4
Abstract
The energy injection through Hawking evaporation has been used to put strong constraints on primordial black holes as a dark matter candidate at masses below 10(17) g. However, Hawking's semiclassical approximation breaks down at latest after half-decay. Beyond this point, the evaporation could be significantly suppressed, as was shown in recent work. In this study we review existing cosmological and astrophysical bounds on primordial black holes, taking this effect into account. We show that the constraints disappear completely for a reasonable range of parameters, which opens a new window below 10(10) g for light primordial black holes as a dark matter candidate.