Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321..593k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 321, Oct. 1, 1987, p. 593-605.
Astronomy and Astrophysics
Astrophysics
10
Centimeter Waves, Solar Flares, Solar Spectra, Very Large Array (Vla), Astronomical Maps, Magnetic Field Configurations, Nonthermal Radiation, Plasma Heating, Solar Magnetic Field, Solar Radiation, Synchrotron Radiation
Scientific paper
VLA observations of a solar active region and a flare are discussed. The event was observed at wavelengths of 2 and 6 cm simultaneously. Radio maps prior to the flare delineate the most important magnetic structures in the region. Interaction between these structures apparently led to preheating of plasma above the active region some 30 minutes prior to the flare. The 2 and 6 cm flare positions were coincident, and the time profiles of the burst at the two wavelengths were almost identical, implying that the same population of electrons was responsible for emission at the two wavelengths. Emission was probably nonthermal gyrosynchrotron radiation, and the physical conditions in the burst source are derived using this assumption.
Kundu Mukul R.
Velusamy Thangasamy
White Stephen M.
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