Kavli Affiliate: Gordan Krnjaic
| First 5 Authors: Dan Hooper, Aurora Ireland, Gordan Krnjaic, ,
| Summary:
The origin of our universe’s cosmological magnetic fields remains a mystery.
In this study, we consider whether these magnetic fields could have been
generated in the early universe by a population of charged, spinning primordial
black holes. To this end, we calculate the strength of the magnetic fields
generated by this population, and describe their evolution up to the current
epoch. We find that extremal black holes in the mass range $ M sim 10^{28}
-10^{36} , {rm g}$ could potentially produce magnetic fields with present day
values as large as $B sim 10^{-20} – 10^{-15} , {rm G}$. While we remain
largely agnostic as to the origin of these spinning, charged black holes, we do
briefly discuss how new physics may have induced a chemical potential which
could have briefly maintained the black holes in an electrically charged state
in the early universe.
| Search Query: ArXiv Query: search_query=au:”Gordan Krnjaic”&id_list=&start=0&max_results=10