Relativistic coherent curvature radiation

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Charged Particles, Coherent Radiation, Particle Acceleration, Pulsars, Relativistic Plasmas, Stellar Magnetic Fields, Magnetic Field Configurations, Plasma Waves, Pulsar Magnetospheres, Stellar Radiation

Scientific paper

The objections raised by Kirk (1980) to the formalism describing the coherent curvature radiation of charged particles proposed by Benford and Buschauer (1977) are examined. It is shown that Kirk's results arise from qualitative calculations of boundary effects. Exact calculations are presented which show that the non-curvature radiation comes from the body of the plasma due to the longitudinal acceleration it is experiencing. In general, it is found that the introduction of moving plasma waves into relativistic systems will increase the emitted power and broaden the spectrum. These results are applicable to the coherent radio pulsar emission which may come from plasma columns moving along the curved magnetic fields lines of pulsar magnetospheres.

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