Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apjs...57..621k&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 57, March 1985, p. 621-630.
Astronomy and Astrophysics
Astronomy
20
Solar Flares, Solar Radio Emission, Ultraviolet Astronomy, H Alpha Line, Magnetic Signatures, Microwave Emission
Scientific paper
The results of high-resolution observations of the solar preflare activity of June 25, 1980 are analyzed. The observations were carried out simultaneously in the UV microwave, and H-alpha wavelengths using the VLA, the Ottawa River photoheliograph, and the Solar Max spectrometer and polarimeter instruments. Increases were observed in the intensitiy and polarization of compact sources at a wavelength of 6-cm during the preflare hour. The increases were associated with rising and twisting motions in the magnetic loops near the sight of the subsequent flare. Consistent with this process, analysis of the transverse and Doppler motions observed in the H-alpha filament before disruption showed that the filament was activated internally by the motions of evolving magnetic flux patterns. Ultraviolet data for C IV brightenings and upflows at the first appearance of the H-alpha filament indicated the presence of rising magnetic loops and material rising within the loops. The complete VLA, microwave and H-alpha data sets are given.
Gaizauskas Victor
Jones Philip H.
Kundu Mukul R.
Schmahl Ed. J.
Shine Richard
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