Physics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...86..205k&link_type=abstract
(Japan Society for the Promotion of Science and National Science Foundation, U.S.-Japan Seminar on the Recent Advances in the Un
Physics
17
Centimeter Waves, Coronal Loops, Solar Flares, Solar Radio Bursts, Astronomical Maps, Current Sheets, Energy Transfer, Magnetic Flux, Polarimetry, Solar Magnetic Field, Very Large Array (Vla)
Scientific paper
The spatial characteristics of microwave bursts are examined in relation to impulsive and post-burst phases using data collected by the Very Large Array and the Westerbork Synthesis Radio Telescope. The existence of a gradual and a spiky component in the impulsive phase is examined using high time and spatial resolution observations. It is proposed that homologous flares exist at 6 cm, based on the similarity of their spatial structure and their temporal evolution. Preflare changes in microwave active regions are studied in terms of newly emerging flux at the flare site. High spatial resolution observations of the structure of microwave flaring loops are interpreted in terms of arcades of loops at the sites of primary energy release. The relative timing of the peaks of impulsive hard X-ray and microwave bursts is analyzed. The role of the emergence of new flux and of the current sheet formed between closed loops in producing impulsive energy release at centimeter wavelengths is examined.
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