A solar radio burst with a strong decimeter component has been observed on
February 11, 2000, with a high time- and spectral resolution.
The spectrum was recorded using the new 48 channel spectrometer with
0.01 s time resolution which supplements the regularly observed 40-800
MHz spectra during special observing campaigns.
It operates in the automatic solar radio observing station of the AIP
in Tremsdorf near Potsdam (see also the
Solar Radio web-page )
The left panel shows the spectrum, right panel its time derivative.
Intensities are logarithmically scaled and color coded.
Time parallel lines are terrestrial transmitters.
Our data invite to discuss the role played by nonthermal electrons in
the flare loops.
The flare-accelerated electron streams move along field lines turning in some
1000 km height above the photosphere and draw partly radio pulsations,
partly fiber bursts and radio spikes as shown nicely in the right panel.
The event is remarkable due to the strength and sharpness of the pattern.
( credit: H. Aurass ).
