Radiative back-reaction makes charged particles under an attractive Lorentz force fall onto a magnetized neutron star, while under a repulsive force they either widen their orbits or fall, depending on the starting latitude.
High magnetic field neutron stars and magnetars in binary systems
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abstract
Situation with highly magnetized neutron stars in binary systems is not yet certain. On the one hand, all best studied magnetars seem to be isolated objects. On the other, there are many claims based on model-dependent analysis of spin properties or/and luminosity of neutron stars in X-ray binaries in favour of large fields. In addition, there are a few results suggesting a magnetar-like activity of neutron stars in close binary systems. Most of theoretical considerations do not favour even existence, not speaking about active decay, of magnetar-scale fields in neutron stars older than $\sim10^6$~yrs. However, alternative scenarios of the field evolution exist. I provide a brief review of theoretical and observational results related to the presence of neutron stars with large magnetic field in binaries and discuss perspectives of future studies.
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Radiative Back-Reaction on Charged Particle Motion in the Dipole Magnetosphere of Neutron Stars
Radiative back-reaction makes charged particles under an attractive Lorentz force fall onto a magnetized neutron star, while under a repulsive force they either widen their orbits or fall, depending on the starting latitude.