Magnetospheric birefringence breaks the rotating-vector model and depolarises X-ray pulsarstranslating…

arXiv:2608.27699v1 Announce Type: new Abstract: Accreting X-ray pulsars have long been expected to show large linear polarisation below the cyclotron resonance. In the standard picture, this follows from two facts: radiative opacities in the strongly magnetised neutron star…