Magnetosphere of Oscillating Neutron Star. Nonvacuum Treatment
Abstract
We generalize a formula for the Goldreich-Julian charge density (\rho), 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/(\omega r))\rho c. It is shown that the energy losses are strongly affected by plasma in the magnetosphere, and cannot be described by vacuum formulas.
Keywords
Cite
@article{arxiv.astro-ph/9909354,
title = {Magnetosphere of Oscillating Neutron Star. Nonvacuum Treatment},
author = {A. N. Timokhin and G. S. Bisnovatyi-Kogan and H. C. Spruit},
journal= {arXiv preprint arXiv:astro-ph/9909354},
year = {2009}
}
Comments
submited to MNRAS (22 pages, 12 figures; revised version: minor conceptual changes and corrections)