In the last few years the case that primordial black holes make up a significant fraction of the dark matter has received steadily increasing support from a wide variety of observations. If indeed this is the case then there are a number of observational consequences to be expected. In this talk I shall describe situations where such a population of compact bodies should betray their...
Understanding the evolution of primordial black hole (PBH) populations across cosmic history is critical for reconciling observational data with theoretical formation models. Previous studies showed that gas accretion can significantly alter the mass and spin distributions of PBH binaries from their formation time to the low-redshift universe where gravitational wave signals are observed....
The 21cm signal, soon to be probed by upcoming experiments, is a powerful late-time cosmological tool for constraining Primordial Black Holes (PBHs). Some of the most stringent limits on PBH abundance in the solar mass range are derived using 21cm forecasts. In this talk, I will critically re-examine these forecasts, highlighting the impact of astrophysical uncertainties on the derived...
If primordial black holes (PBHs) of asteroidal mass make up the entire dark matter, they could be detectable through their gravitational influence in the solar system. In this work, we study the perturbations that PBHs induce on the orbits of planets. Detailed numerical simulations of the solar system, embedded in a halo of PBHs, are performed. We find that the gravitational effect of the PBHs...
In this talk, we present our study of the cosmic antiproton and antideuteron fluxes produced by the evaporation of galactic primordial black holes (PBHs) with lognormal initial mass distributions. The antimatter production spectra were obtained using our modified version of the BlackHawk code, which incorporates the new CosmiXs hadronization spectra and a state‐of‐the‐art Wigner function...
Quasi-normal modes are a crucial feature of black holes and their study is fundamental to understanding these objects. These excitations are not only linear but it has been shown to have a relevant non-linear counterpart, in general difficult to calculate.
The Penrose limit connects a plane wave geometry to the photon ring of a black hole, where the quasi-normal modes are located in the...
Observation of an exploding black hole would provide the first direct evidence of primordial black holes, of Hawking radiation, and provide definitive information on the particle spectrum of nature. However, indirect constraints suggest that direct observation of an exploding Schwarzschild black hole is implausible. We introduce a dark-QED toy model consisting of a dark photon and a heavy...
