Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...477..293l&link_type=abstract
Astronomy and Astrophysics, Volume 477, Issue 1, January I 2008, pp.293-298
Astronomy and Astrophysics
Astrophysics
1
Sun: Solar Wind, Sun: Radio Radiation, Shock Waves
Scientific paper
Aims:We investigate the characteristics of energetic electron beams, plasma turbulence and radio emission from interplanetary shock waves. Methods: Numerical calculations of spectra and Landau damping of hot plasma eigen oscillations in the magnetic field are used. Results: It is shown that the longitudinal wave spectrum, excited in the solar wind plasma, extends with the increase of the refractive index n over range of values n>10. This result allows us to explain the broad band of emission, the constant value of the average ratio of frequency-band to radio emission frequency from interplanetary shock wave fronts, and to estimate the electron beam density and amplitude of Langmuir waves at the shock. It is shown that a spectrum of radio emission is determined by the spectrum of Langmuir waves excited upstream of the interplanetary shock wave by heated electrons escaping from the shock wave front.
Aguilar-Rodriguez Ernesto
Ledenev V. G.
Tirsky V. V.
Tomozov V. M.
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