Black holes and gravitational waves in models of minicharged dark matter

摘要: In viable models of minicharged dark matter, astrophysical black holes might be charged under a hidden $U(1)$ symmetry and are formally described by the same Kerr-Newman solution Einstein-Maxwell theory. These objects unique probes matter photons. We show that recent gravitational-wave detection binary black-hole coalescence aLIGO provides various observational bounds on hole's charge, regardless its nature. The pre-merger inspiral phase can used to constrain dipolar emission (ordinary dark) photons, whereas quasinormal modes set an upper limit final charge. By using toy model point charge plunging into Reissner-Nordstrom hole, we also in dynamical processes (hidden) electromagnetic object excited considerable amplitude spectrum only when hole is nearly extremal. produces burst low-frequency photons which provide possible counterpart mergers these scenarios.