2 papers
astro-ph.CO2025
Stupendously Large Primordial Black Holes from the QCD axion
Miguel Faria, Ricardo Z. Ferreira, Fabrizio Rompineve
The inflationary diffusion of (pseudo-)scalar fields with discrete symmetries can seed the formation of a gas of closed domain walls after inflation, when the distance between dege…
hep-ph2024
Lighten up Primordial Black Holes in the Galaxy with the QCD axion: Signals at the LOFAR Telescope
Ricardo Z. Ferreira, Ángel Gil Muyor
In this work, we study the luminosity that results from the conversion of QCD axion particles into photons in the magnetic field of the plasma accreting onto black holes (BHs). For…