Speaker
Description
Primordial black holes (PBHs) remain a viable candidate for Dark matter. The goal of this work is to constrain their parameter space with a new fundamental probe, the Lyman-alpha forest, which depends on two parameters, the reionization history and thermal history of the universe. We adopt extended mass functions for the PBH mass distribution. To implement the effect of PBHs in cosmological simulations we enhance the small-scale power spectrum in the initial conditions to reproduce the expected effect of the discreteness of mass on massive PBHs and the alternative models of inflation that produce them. These models are run using a quick lyman-alpha version of the SWIFT code and compared to DESI data. To avoid numerical artifacts, we ran several fiducial models and computed the ratio between the PBH and CDM predictions, and between CDM and observations.
| Other topic / keywords: | Primordial Black Holes |
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