Electrodynamics of inhomogeneous relativistic electron-positron plasma and radio emission of pulsars

Details Electrodynamics of inhomogeneous relativistic electron-positron plasma and radio emission of pulsars Electrodynamics of inhomogeneous relativistic electron-positron plasma and radio emission of pulsars

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.251..411b&link_type=abstract

In ESA Proceedings of the Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics p 411-415 (SEE N87-

Physics

Plasma Physics

Electrohydrodynamics, Electron-Positron Plasmas, Pulsars, Radio Emission, Relativistic Plasmas, Stellar Radiation, Cerenkov Radiation, Magnetohydrodynamic Stability, Permittivity, Plasma Oscillations, Plasma Physics, Pulsar Magnetospheres

Scientific paper

The dielectric permeability tensor of an inhomogeneous electron-positron plasma is derived. Natural modes of electromagnetic oscillations and their polarization are found. Their increments and amplification coefficients are determined. The trajectories of propagation of the amplified modes and their connection with the observed radio wave going to infinity are calculated. It is shown that a relativistic plasma moving along a strong curvilinear magnetic field is unstable. The instability which leads to generation of electromagnetic waves is hydrodynamic. It is related to Cerenkov excitation of curvature radiation and has high increments. In pulsar magnetospheres, the instability stimulates intense excitation of field and plasma oscillations in the region of open field lines. At a distance (10 to 100) R from a neutron star these oscillations are transformed into ordinary radio emission with a frequency range 0.01 to 10 GHz.

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