Carlos Hervías-Caimapo, Ari J. Cukierman, Patricia Diego-Palazuelos, Kevin M. Huffenberger, and Susan E. Clark
Phys. Rev. D 111, 083532 (2025) - Published 15 April, 2025
The detection of rotation of linearly polarized cosmic microwave background photons, which is called cosmic birefringence, may suggest new parity-violating physics. However, scattering by dust can also mimic this same effect. In this paper, the authors extend a pre-existing dust filament model to compute this effect to make a forecast for future CMB experiments and assess the effect of this dust on present isotropic measurements of cosmic birefringence.