Curvature mechanism of generation of longitudinal waves in the magnetosphere of a neutron star

Details Curvature mechanism of generation of longitudinal waves in the magnetosphere of a neutron star Curvature mechanism of generation of longitudinal waves in the magnetosphere of a neutron star

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981afz....17..749s&link_type=abstract

(Astrofizika, vol. 17, Oct.-Dec. 1981, p. 749-763.) Astrophysics, vol. 17, no. 4, Apr. 1982, p. 407-416. Translation.

Astronomy and Astrophysics

Astrophysics

8

Longitudinal Waves, Magnetically Trapped Particles, Magnetospheric Instability, Particle Trajectories, Pulsars, Relativistic Particles, Stellar Atmospheres, Stellar Magnetospheres, Stellar Radiation, Wave Amplification, Cerenkov Radiation, Optical Thickness, Plasma Waves, Pulsar Magnetospheres, Relativistic Electron Beams, Stellar Magnetic Fields

Scientific paper

The magnetic drift curvature mechanism for generation of longitudinal waves whose refractive index is approximately equal to 1, where the absolute value of 1 - n is much less than 1, due to the motion of a charged relativistic particle along a magnetic field's curved lines of force, is investigated along with the reabsorption of the longitudinal waves by a stream of charged particles moving along a curved trajectory. It is shown that the reabsorption coefficient may be negative for waves with n values above or below 1, and that effective amplification is possible when the longitudinal waves propagate in either a nonrelativistic or relativistic plasma. An estimate is obtained for the optical thickness of magnetic drift absorption under conditions characteristic of a pulsar's magnetosphere, and a criterion of applicability is established for the treatment of a plasma whose dispersion properties vary along the trajectory of the charged particle stream.

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