Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...258..388v&link_type=abstract
Astrophysical Journal, Part 1, vol. 258, July 1, 1982, p. 388-392.
Astronomy and Astrophysics
Astronomy
26
Centimeter Waves, Polarized Electromagnetic Radiation, Radio Astronomy, Solar Radio Bursts, Brightness Temperature, Magnetic Field Configurations, Solar Flares, Solar Magnetic Field
Scientific paper
Evolutionary changes in the total intensity and polarization structure of a 6 cm radio burst source have been observed with the VLA, over time scales ranging from 10 s to several minutes. This burst was associated with a 2B/M1 flare observed on 1980 May 14. The 6 cm burst consisted of a gradual phase of 30 minutes duration and a strong impulsive phase of duration less than two minutes. Synthesized maps of total intensity and polarization were obtained with spatial resolution of 2 x 3 arcsec and with temporal resolutions of five minutes during the gradual phase and 10 s during the impulsive phase. The sequence of polarization maps suggests a complex magnetic field structure undergoing rapid changes. Most importantly, they show the development of two bipolar regions or quadrupole structure just prior to the impulsive energy release.
Kundu Mukul R.
Velusamy Thangasamy
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