On the Envelope Soliton - Like Fine Structure in Solar Radio Emission

Details On the Envelope Soliton - Like Fine Structure in Solar Radio Emission On the Envelope Soliton - Like Fine Structure in Solar Radio Emission

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap%26ss.288..293w&link_type=abstract

Astrophysics and Space Science, v. 288, Issue 3, p. 293-303 (2003).

Astronomy and Astrophysics

Astrophysics

Scientific paper

Several quasi-periodic, milliseconds fine structures in the metric wave band occurring during the evolution of solar type IV bursts have been observed by Yunnan Radio Telescope, Trieste Radio Telescope and IZMIRAN dynamic spectrometer. The envelope of these quasi-period modulational fine structures have a soliton pattern, so it is called an envelope soliton-like fine structure. A modulational instability model of electromagnetic wave has been adopted here. It is found that the longitudinal modulational instability can occur only in the solar coronal region of low magnetic field and high temperature, as well as high density plasma, which will give rise to the envelope soliton-like fine structures in the solar metric and decimetric radio emission. The propagation effects of envelope soliton-like fine structure from corona to the observer on the Earth have been briefly considered.

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