Speaker
Description
The abundance of primordial black holes is constrained by observations of the Cosmic Microwave Background (CMB): these compact objects would accrete matter and emit high-energy photons, altering the statistical properties of the CMB. The presence of dense dark matter mini-halos around the PBHs has been used to further tighten the bounds, as these would boost the accretion rates. In this poster, I discuss how radiative feedback affects CMB constraints. In particular, I argue that the local increase in temperature around PBHs can prevent dark matter mini-halos from strongly enhancing the accretion process, in some cases significantly weakening previously derived constraints.
Based on https://arxiv.org/abs/2403.18895, in collaboration with D. Agius, R. Essig, D. Gaggero, G.Suczewski, M. Valli.
| Would you be interested in presenting a poster? (this will not impact the decision on your talk) | yes |
|---|
