Radio imaging of solar flares using the very large array - New insights into flare process

Details Radio imaging of solar flares using the very large array - New insights into flare process Radio imaging of solar flares using the very large array - New insights into flare process

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...108..188k&link_type=abstract

Astronomy and Astrophysics, vol. 108, no. 1, Apr. 1982, p. 188-194. Research supported by the University of Maryland

Astronomy and Astrophysics

Astronomy

48

Astronomical Photography, Coronal Loops, Microwave Emission, Radio Telescopes, Solar Flares, Solar Radio Bursts, Very Large Array (Vla), Current Sheets, Particle Acceleration, Radio Astronomy, Relativistic Electron Beams, Solar Magnetic Field, Topology

Scientific paper

An interpretation of VLA observations of microwave bursts is presented in an attempt to distinguish between certain models of flares. The VLA observations provide information about the pre-flare magnetic field topology and the existence of mildly relativistic electrons accelerated during flares. Examples are shown of changes in magnetic field topology in the hour before flares. In one case, new bipolar loops appear to emerge, which is an essential component of the model developed by Heyvaerts et al. (1977). In another case, a quadrupole structure, suggestive of two juxtaposed bipolar loops, appears to trigger the flare. Because of the observed diversity of magnetic field topologies in microwave bursts, it is believed that the magnetic energy must be dissipated in more than one way. The VLA observations are clearly providing means for sorting out the diverse flare models.

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