| Description: | Stupendously large primordial black holes (PBHs) with masses of more than 10^11 solar masses have only recently become an interesting field of study. In this talk, I will extend this idea by adding extreme charges to such extremely massive PBHs, inspired by the idea that such extremely charged and massive PBHs could explain a major part of the so-far elusive dark matter or even dark energy. While the extreme nature of these objects suggests a rather disruptive effect on their environment, e.g. potentially inducing proton decay, I will show that this is not the case, so that their existence cannot be easily refuted on these grounds. Subsequently, I will derive observable consequences that can lead to the discovery of such objects with galaxy-scale to galaxy-cluster-scale masses, if they exist. In particular, perturbations to spectra of neutral gas clouds, rotation measures of plasma clouds, and strong gravitational lensing signatures seem to be good candidate phenomena to be searched for in upcoming sky surveys from radio over infra-red to optical bands. |
