Radio observations of the July 13, 2000 transequatorial eruptive prominence
Abstract
Using the 17 and 34 GHz Nobeyama Radioheliograph observations the July 13, 2000 transequatorial eruptive prominence was studied. It was found that the eruption started near the bright equatorial feature, which reappeared in the post-eruption phase. During 7 hours of observations of this feature periodic variations of its brightness temperature were recognized, e.g. in the initial phase of the prominence eruption their characteristic period was about of 12 minutes. Circular loops and helical structures of different scales, indicating the presence of electric currents were observed during the whole prominence eruption. The velocity of the upper boundary of the prominence in the image plane, along the chosen line was estimated as 24 km s-1 in the first 15 minutes of the eruption and about of 66 km s-1 in following times. Finally, the observations are shortly discussed.
- Publication:
-
Solar Variability: From Core to Outer Frontiers
- Pub Date:
- December 2002
- Bibcode:
- 2002ESASP.506..657K
- Keywords:
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- Eruptive Prominence;
- Radio Images