Radio observation of sudden shock wave deceleration above solar flare

Details Radio observation of sudden shock wave deceleration above solar flare Radio observation of sudden shock wave deceleration above solar flare

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982baicz..33...72k&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin, vol. 33, no. 2, 1982, p. 72-75.

Astronomy and Astrophysics

Astronomy

7

Deceleration, Radio Astronomy, Shock Wave Propagation, Solar Flares, Type 2 Bursts, Broadband, Magnetohydrodynamic Turbulence, Propagation Velocity, Radio Frequencies, Solar Corona, Solar Magnetic Field

Scientific paper

Sudden changes in frequency drift accompanied by broadening of the frequency spectra and herringbone structure were observed in the initial phase in three different cases of type II burst observations. The phenomenon is interpreted as a sudden shock wave deceleration, which is found to be the limiting factor for the existence of fast shock waves under coronal conditions, and which may be connected with the second phase of acceleration in the flare. Type II bursts with a frequency ratio of about 1.5 and occasionally with a herringbone structure, correspond to shock waves in turbulent states, while the laminar stage corresponds to a narrow-band type II burst.

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