Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199..219s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 199, Apr. 1982, p. 219-228. Research supported by the Science Research
Astronomy and Astrophysics
Astronomy
5
Light Emission, Particle Flux Density, Pulsars, Relativistic Particles, Stellar Magnetic Fields, Stellar Radiation, Synchrotron Radiation, Astronomical Models, Electron Plasma, Electron-Positron Plasmas, Lasers, Positrons, Wave Propagation
Scientific paper
Particles streaming relativistically along magnetic field lines through a slower-moving electron-positron plasma gain finite pitch angles by the two-stream instability. Synchrotron radiation from these particles can be amplified for appropriate particle distributions. A synchrotron laser operating along the open magnetic field lines at a distance of 35 million cm from the surface is suggested as the optical emission mechanism for the Crab pulsar. The presence of the electron-positron plasma gives linearly polarized emission when the optical depths for the two linearly polarized natural modes are different. Saturation of the laser produces a constant optical profile provided the flux of particles from the pulsar which provides the population inversion is suitably constant.
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