Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265.1084k&link_type=abstract
Astrophysical Journal, Part 1, vol. 265, Feb. 15, 1983, p. 1084-1089.
Astronomy and Astrophysics
Astrophysics
23
Centimeter Waves, Coronal Loops, H Alpha Line, Solar Flares, Solar Radio Bursts, Solar Spectra, Brightness Temperature, Chromosphere, Microwave Emission, Microwave Spectra, Solar Electrons, Solar Magnetic Field
Scientific paper
Three subflares were observed at 6 cm λ and at Hα (6563 Å) with the VLA and the Solar Observing Optical Network high resolution telescopes. Synthesized maps with integration times of 10 and 30 s show that most of the 6 cm burst emission originated in ≡10arcsec - 15arcsec features coincident with or adjacent to Hα flare kernels. During the onset of one of the subflares 6 cm emission was discovered in a loop stretching >105 km from the primary flare site; this emission was associated with faint Hα flarelike brightness at the remote footpoint of the loop. Assuming that the energy for the distant brightening originated at the primary flare site, it is found that ≡4 × 1024 ergs s-1 propagated along the connecting magnetic loop at a velocity of ≥ 6000 km s-1. Various possible mechanisms for the distant activation are discussed.
Bobrowsky Matthew
Kundu Mukul R.
Rust David Maurice
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