Double Loop Configuration of a Flaring Region from Microwave, EUV and X-ray Imaging Data

Details Double Loop Configuration of a Flaring Region from Microwave, EUV and X-ray Imaging Data Double Loop Configuration of a Flaring Region from Microwave, EUV and X-ray Imaging Data

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sp51a04g&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SP51A-04

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7519 Flares, 7534 Radio Emissions

Scientific paper

We present the results of a study of a flare of importance M1.7 that was observed with the Nobeyama Radio Heliograph (NoRH), SOHO/EIT and MDI and Yohkoh/HXT & SXT. The flare ocurred in a complex of two active regions AR~8741 and AR~8739, which were separated by ~ 3 arc min. The main flaring region was AR~8741, which consisted of two compact oppositely polarized components as judged by MDI magnetogram data. 17~GHz and 34~GHz microwave emissions as well as EUV, and hard and soft X-ray emissions from the flare originated primarily from the vicinity of the compact components of opposite polarity in AR~8741. There was some 17~GHz flaring emission from AR~8739. Clearly, we are dealing with a large magnetic loop connecting AR~8741 and AR~8739, as well as a compact loop in AR~8741 which was the main flare site. One of the magnetic components of the compact loop increased in field strength approximately 1 hour prior to the flare onset. MDI magnetograms showed some other changes in the magnetic fields associated with the compact loop. We suggest that the interaction of the compact loop with the large loop was responsible for causing the flare. The radio source structures at 17 and 34 GHz along with EUV, hard and soft X-ray source structures of the flaring region will be presented.

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