Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pazh...15..353k&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 15, April 1989, p. 353-357. In Russian.
Astronomy and Astrophysics
Astronomy
3
Chromosphere, Electron Beams, Electron Plasma, Solar Flares, Solar X-Rays, Cerenkov Radiation, Plasmons, Solar Magnetic Field, Solar Wind
Scientific paper
The stability of an electron beam in the solar chromosphere plasma is studied theoretically, and it is shown that the Cerenkov resonance condition is satisfied for slow extraordinary waves for mean values of the magnetic field, plasma concentration and beam velocity (v = 0.3 c). Beam stabilization occurs due to induced scattering of plasmons by thermal electrons; this stabilization occurs at different times for electrons of different energies. It is noted that the leading front of solar-flare X-rays can be explained by the beam stabilization mechanism described here. This provides indirect evidence that hard X-rays are generated by fast-electron beams.
Charikov Iu. E.
Kudriavtsev I. V.
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