2021-10-22 11:00  Online

Correlated gravitational wave and microlensing signals of macroscopic dark matter

Po-Yen Tseng

Fermion dark matter particles can aggregate to form extended dark matter structures via a first-order phase transition in which the particles get trapped in the false vacuum. We study {it Fermi balls} created in a phase transition induced by a generic quartic thermal effective potential. We show that for Fermi balls of mass, $3 imes10^{-12}M_odot lsim M_{ m FB} lsim 10^{-5}M_odot$, correlated observations of gravitational waves produced during the phase transition (at SKA/THEIA/$mu$Ares), and gravitational microlensing caused by Fermi balls (at Subaru-HSC), can be made.