Coherent radiation from pulsars

Details Coherent radiation from pulsars Coherent radiation from pulsars

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..734c&link_type=abstract

Astrophysical Journal, Part 1, vol. 229, Apr. 15, 1979, p. 734-741.

Astronomy and Astrophysics

Astronomy

4

Coherent Radiation, Electron Radiation, Plasma-Particle Interactions, Pulsars, X Ray Sources, Fourier Transformation, Gamma Rays, Luminous Intensity, Particle Energy, Plasma Density, Radio Frequencies, Radio Sources (Astronomy), Relativistic Particles

Scientific paper

An analysis is performed which demonstrates that an electron (or positron) stream can propagate through a plasma parallel to a very strong magnetic field only if its length is less than some critical length. It is argued that this natural limitation on stream length and the concomitant charge distributions induced by the stream in the background plasma are responsible for the bunch formation that can account for the coherence of pulsar radiation. This theory implies that pulsar radiation should consist of two widely separated frequency components, a coherently produced LF component in the microwave or radio range and an incoherent HF component in the X-ray or gamma-ray range, so that a typical pulsar should appear to emit simultaneously a very luminous radio pulse and a much less luminous gamma-ray pulse, with little or no radiation emitted at intermediate frequencies. The number of coherently radiating plasma particles per bunch is estimated to be around 10 to the 14th to 10 to the 15th, which is of the order required to explain the high radio luminosities of typical pulsars.

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