https://arxiv.org/abs/2411.13499 also the question of an equivalent of MOND for modified electromagnetism remains open. Same for the possible bennet pinch effect in cosmic filaments also wonder if related to cosmic birefringence
The Faraday Rotation Measure (RM) is a measure of the polarization angle rotation by birifrangence of the two circular polarization states, produced when a polarized radiation trav- els trough a magneto-ionic medium with a magnetic field and populated with free electrons (a plasma).
also some properties of RM evolve with redshift btw POSSUM seems to be the next gen survey dedicated to rotation measures https://arxiv.org/abs/2403.15668
https://www.researchgate.net/publication/356740862_Testing_the_Theory_That_Interstellar_Filaments_Are_Formed_by_the_Bennett_Pinch_With_Recent_Data https://iopscience.iop.org/article/10.3847/2041-8213/ac3cc1
also distinct from the RM: https://arxiv.org/abs/2106.05989 btw some pinches might allow catalysis of nuclear fusion! https://en.wikipedia.org/wiki/Z-pinch#:~:text=to%20controlled%20fusion.-,Sheared%2Dflow%20stabilized,-%5Bedit%5D