Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.207..247a&link_type=abstract
In ESA Plasma Astrophys. p 247-250 (SEE N85-22270 12-90)
Astronomy and Astrophysics
Astrophysics
Astronomical Models, Earth Magnetosphere, Pulsars, Rotating Plasmas, Stellar Magnetic Fields, Cold Plasmas, Force-Free Magnetic Fields, Particle Motion, Plasma Potentials, Vacuum Effects
Scientific paper
The possibility for a magnetospheric cold, force free, finite, non corotating plasma to be separated from a corotating plasma (including the neutron star) by a vacuum gap limited by two force-free surfaces is examined. It is concluded that axisymmetric vacuum bubbles cannot exist. Beams of particles which propagate up and down, along the magnetic dipole field lines, between the stellar surface and a non force-free surface located at a finite distance, beyond which vacuum exists are considered. There is no vacuum potential that can be linked to such a plasma potential. An alternative configuration is studied. Exchange of particles between the neutron star surface and a force-free magnetospheric plasma is possible if the resultant beams propagate into a magnetospheric plasma which has a positive charge density.
Asseo Estelle
Beaufils D.
Pellat Rene
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