Special fine structures of solar radio bursts on April 15 1998
Z. Ning 1,2,3,
Q. Fu 1,3 and
Q. Lu 2
Received 9 July 2000 / Accepted 11 August 2000
The 2.60-3.80 GHz spectrometer in Beijing Astronomical Observatory (BAO) recorded two remarkable "decimetric pulsation" events (DCIM) around the time 1998 0415 0800 UT. High resolution dynamic spectra revealed various new fine structures during the rising phase of the second DCIM, which seem different from "zebra patterns" well known at lower frequencies. The high frequency limit of the second DCIM is delineated by 1 to 3 narrow and continuous emission bands whose frequencies fluctuate in parallel, and which occasionally split and merge. They look like the "evolving emission line" (EEL) reported by Chernov et al. (1998) at lower frequencies. It is the second time that such a feature has been recorded, and the first time above 1 GHz.
Key words: Sun: activity Sun: radio radiation
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© European Southern Observatory (ESO) 2000
Online publication: January 29, 2001