IXPE data on magnetar 1E 1547.0-5408 show high linear polarization from a small hot spot whose phase-dependent angle is fit by a rotating vector model, with a marginal energy-dependent dip in polarization degree that may indicate vacuum resonance but does not constitute compelling evidence for biref
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Simulations of subcritical X-ray pulsar accretion channels show vacuum polarization dominating plasma birefringence, enhancing cyclotron features and radiative deceleration, producing a polarization sign change above resonance, and a positive correlation between cyclotron centroid energy and accret
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The long quest for vacuum birefringence in magnetars: 1E 1547.0-5408 and the elusive smoking gun
IXPE data on magnetar 1E 1547.0-5408 show high linear polarization from a small hot spot whose phase-dependent angle is fit by a rotating vector model, with a marginal energy-dependent dip in polarization degree that may indicate vacuum resonance but does not constitute compelling evidence for biref
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Vacuum polarization and cyclotron resonance effects on radiative transfer and plasma deceleration in subcritical X-ray pulsars
Simulations of subcritical X-ray pulsar accretion channels show vacuum polarization dominating plasma birefringence, enhancing cyclotron features and radiative deceleration, producing a polarization sign change above resonance, and a positive correlation between cyclotron centroid energy and accret