Very large array observations of coronal loops and related observations of solar type stars

Physics

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Coronal Loops, Solar Activity, Solar Corona, Solar Observatories, Stars, Very Large Array (Vla), Arrays, Infrared Photography, Magnetic Fields, Predictions, Telecommunication, Temperature

Scientific paper

Observations of solar active regions with the Very Large Array (V.L.A.) led to a new understanding of the origin and prediction of the solar bursts which disrupt communication systems and interfere with high-flying aircraft. The V.L.A. was used to delineate the temperature and magnetic structure at different heights in coronal loops, and the magnetic field strength was also determined. Much of the visible solar disk was resolved at 20 cm wavelength with 2.6 in. angular resolution. Snapshot maps at intervals of 3 seconds were used to specify changes in the temperature and the magnetic field before and during solar bursts. These snapshot maps were used to investigate the flow of plasma within coronal loops during solar bursts. Postflare loop systems were similarly investigated. Our V.L.A. observations provided new information on coronal heating and emerging magnetic loops that may trigger the emission of solar bursts.

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