Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238.1081j&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, June 15, 1980, p. 1081-1087.
Astronomy and Astrophysics
Astrophysics
5
Boundary Conditions, Boundary Value Problems, Electric Fields, Plasma Dynamics, Polarization Characteristics, Pulsars, Stellar Atmospheres, Electrical Resistivity, Equations Of Motion, Magnetohydrodynamics, Relaxation Time, Stellar Magnetic Fields, Stellar Structure
Scientific paper
Boundary conditions for the electric field of pulsars are considered. Attention is given to the physical mechanisms by which polarization can be established in isolated rotating systems, and the problem of the coupled dynamics in the crust and the atmosphere. It is found that the boundary condition of Pacini (1968) and Goldreich-Julian (1969) can only be prescribed in the limit of the electron-lattice relaxation time approaching zero, which is the limit of zero conductivity rather than the more realistic infinite conductivity limit. It is argued that the only proper boundary condition for the plasma is that the electric and magnetic fields must be continuous at any outer (plasma-vacuum) surface of the atmosphere.
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