Plasma-wave interaction in non-aligned pulsar models

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cold Plasmas, Plasma-Electromagnetic Interaction, Pulsar Magnetospheres, Pulsars, Radio Transmission, Stellar Atmospheres, Stellar Models, Cylindrical Bodies, Relativistic Particles, Rotating Cylinders

Scientific paper

The equations for a cold, nondissipative plasma in the zero rest-mass limit are applied to rotating systems with simple geometries, and with the magnetic and rotation axes nonaligned. The only solutions that are nonsingular at the light cylinder and the equator do not propagate energy across the light cylinder, and require a reflector at infinity. It is conjectured that in realistic models of pulsar magnetospheres, with a Sommerfeld boundary condition at infinity, a quasi-steady state is reached only when the particles have been accelerated to energies high enough for inertial terms to be important: the plasma modifies the vacuum wave, and the wave accelerates the particles to highly relativistic energies. A few comments are made also on current axisymmetric models.

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