VLA observations of interacting flaring loops

Details VLA observations of interacting flaring loops VLA observations of interacting flaring loops

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..134..315k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 134, Aug. 1991, p. 315-327.

Physics

2

Coronal Loops, Solar Flares, Solar Radio Bursts, Very Large Array (Vla), H Alpha Line, Microwaves, Solar Spectra, Solar X-Rays, Synchrotron Radiation

Scientific paper

This study presents 4.9 GHz observations of an impulsive radio burst observed at the VLA on May 16, 1981. The flare occurred in a complex active region containing several spots. The radio burst lay at the edge of an active-region microwave source, close to a neutral line. The compact burst showed morphological evidence for the presence of two loops in the rise phase, with the subsequent burst peak lying between these loops. This suggests that interaction between the loops played some role in the initiation of the flare. The flare spectrum is consistent with thermal gyrosynchrotron emission. The main microwave peak was displaced from the nearest H-alpha kernels by about 10 arcsec, but there is strong evidence for post-flare loops coincident with the H-alpha kernels during the later stages of the event.

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