Complex rotational dynamics of the neutron star in Hercules X-1 revealed by X-ray polarization
Nature Astronomy, Published online: 18 June 2024; doi:10.1038/s41550-024-02295-8 IXPE has revealed how the spin of the accreting neutron star Hercules X-1 changes in three dimensions. The spin axis of the star moves both through the star and across the sky,