The stability of isotropic distribution functions of relativistic electrons. II - Oblique propagating Langmuir waves in an electron-proton plasma

Details The stability of isotropic distribution functions of relativistic electrons. II - Oblique propagating Langmuir waves in an electron-proton plasma The stability of isotropic distribution functions of relativistic electrons. II - Oblique propagating Langmuir waves in an electron-proton plasma

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..427l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 427-434.

Astronomy and Astrophysics

Astrophysics

6

Distribution Functions, Electron Plasma, Electrostatic Waves, Oblique Shock Waves, Relativistic Electron Beams, Active Galactic Nuclei, Compton Effect, Inverse Scattering, Plasma Dynamics, Protons, Spontaneous Emission, Synchrotron Radiation

Scientific paper

By using a monoenergetic isotropic distribution function for relativistic electrons, an instability which excites Langmuir waves with large phase velocities and a large growth rate is found. This strong source for plasma waves may occur in the vicinity of accreting objects, especially in active galactic nuclei with moderate magnetic fields about 1 G. The waves may influence the macroscopic dynamics of the plasma (strong heating) and the relativistic electrons (acceleration). Additionally, the Langmuir waves can be scattered to higher frequencies by inverse Compton scattering with relativistic electrons. This may explain the spectral variations of active galactic nuclei. The condition for the onset of this instability is obtained, and it is shown that the excitation of Langmuir waves by magnetized electrons is special case of synchroton emission.

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