Refractive lensing of scintillating FRBs by subparsec cloudlets in the multiphase CGM

In this work, we theoretically demonstrate a method by which fast radio bursts (FRBs) that are scintillated by scattering in the Milky Way interstellar medium can be used to constrain physical properties of the diffuse circumgalactic medium (CGM) surrounding other galaxies. Essentially, we explicated the ways in which different models of the CGM predict scattering that can modify the amplitude of observed scintillation. As a larger population of scintillating FRBs are detected, this method will shed light on the physical state of the CGM, which contains a substantial fraction of all the baryons in the universe.