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Magnetosphere of Oscillating Neutron Star. Nonvacuum Treatment

A. N. Timokhin·G. S. Bisnovatyi-Kogan·H. C. Spruit
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Abstract

We generalize a formula for the Goldreich-Julian charge density (ρ), originally derived for rotating neutron star, for arbitrary oscillations of a neutron star with arbitrary magnetic field configuration under assumption of low current density in the inner parts of the magnetosphere. As an application we consider toroidal oscillation of a neutron star with dipole magnetic field and calculate energy losses. For some oscillation modes the longitudinal electric field can not be canceled by putting charged particles in the magnetosphere without a presence of strong electric current j = (c/(ωr))ρc. It is shown that the energy losses are strongly affected by plasma in the magnetosphere, and cannot be described by vacuum formulas.

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A. N. Timokhin, G. S. Bisnovatyi-Kogan, H. C. Spruit. 2000-03-02. Magnetosphere of Oscillating Neutron Star. Nonvacuum Treatment. https://doi.org/10.1046/j.1365-8711.2000.03535.x

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