Particle acceleration in pulsar magnetospheres

Computer Science

Scientific paper

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Charged Particles, Particle Acceleration, Pulsar Magnetospheres, Pulsars, Stellar Magnetic Fields, Stellar Radiation, Computer Programs, Green'S Functions, Magnetospheric Electron Density, Pair Production, Plasma Density

Scientific paper

The structure of pulsar magnetospheres and the acceleration mechanism for charged particles in the magnetosphere was studied using a pulsar model which required large acceleration of the particles near the surface of the star. A theorem was developed which showed that particle acceleration cannot be expected when the angle between the magnetic field lines and the rotation axis is constant (e.g. radial field lines). If this angle is not constant, however, acceleration must occur. The more realistic model of an axisymmetric neutron star with a strong dipole magnetic field aligned with the rotation axis was investigated. In this case, acceleration occurred at large distances from the surface of the star. The magnitude of the current can be determined using the model presented. In the case of nonaxisymmetric systems, the acceleration is expected to occur nearer to the surface of the star.

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