Intersecting Flaring Loops in Microwaves: Possible Radio Evidence for Magnetic Reconnection

Details Intersecting Flaring Loops in Microwaves: Possible Radio Evidence for Magnetic Reconnection Intersecting Flaring Loops in Microwaves: Possible Radio Evidence for Magnetic Reconnection

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sp51a05k&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SP51A-05

Physics

7519 Flares, 7534 Radio Emissions

Scientific paper

We present possible radio evidence of magnetic reconnection in a solar flare - an LDE event of GOES class M3.2 that was observed on 1999 February 16 on the disk. Our evidence is based upon the facts that we observed a bright microwave source - a bright blob at 17 and 34~GHz near the intersection of two apparently intersecting flaring loops or as a loop-top source above one flaring loop. The bright microwave source is clearly nonthermal and its time profile is similar to those of the flaring footpoint microwave sources, and in the late decay phase of the event the microwave source structure is similar to that of the corresponding SXR source. The loop-top microwave source shows a movement of order 10 km/s, similar to that observed by Yohkoh in soft X-rays in one LDE event which was considered to be a reconnection event. It is important to note that in the late decay phase this event was associated with CGRO/BATSE 100-300 keV energy electrons which appear to originate primarily from the footpoints of one flaring loop. There are data available in Hα from Hida observatory in Japan which show an ejection during this apparent reconnection event.

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