Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62..973b&link_type=abstract
(Astronomicheskii Zhurnal, vol. 62, Sept.-Oct. 1985, p. 973-982) Soviet Astronomy (ISSN 0038-5301), vol. 29, Sept.-Oct. 1985, p.
Astronomy and Astrophysics
Astronomy
Broadband, Solar Radio Bursts, Electron Acceleration, Electrostatic Waves, Magnetic Field Reconnection, Type 3 Bursts, Type 4 Bursts, Wave Scattering
Scientific paper
Observations of high-resolution dynamic spectra of solar broad-band 'spike' bursts (BSB), consisting of the instantaneous brightening of the continuum in the entire spectrograph range of 175-235 MHz, are reported. In noise storms events of the BSB type are rarely encountered and have the form of individual bursts with an average duration of 0.1-0.2 sec or groups of such bursts connected with type III bursts at lower frequencies. Series of aperiodic BSB structures unconnected with type III bursts and observed together with one-second pulsations and fiber bursts, predominate in type IV bursts. In noise storms BSB bursts can be emitted by electrons accelerated instantaneously as a result of the reconnection of magnetic fields, both in a small source (about 10 to the 8th cm) with a broad velocity dispersion and in an extended source (about 5 x 10 to the 9th cm). Structures of the BSB type in type IV bursts may be the result of the scattering of Langmuir waves on whistlers in a large height range.
Bakunin L. M.
Chernov Gennady P.
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