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Radio imaging of solar flares using the very large array - New insights into flare processAn 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.
Document ID
19820047223
Document Type
Reprint (Version printed in journal)
Authors
Kundu, M. R.
(Maryland Univ. College Park, MD, United States)
Schmahl, E. J.
(Maryland Univ. College Park, MD, United States)
Vlahos, L.
(Maryland, University College Park, MD, United States)
Velusamy, T.
(Maryland Univ. College Park, MD, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Astronomy and Astrophysics
Volume: 108
Issue: 1, Ap
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NSF ATM-78-21762
CONTRACT_GRANT: NSG-5320
CONTRACT_GRANT: NGR-21-001-199
CONTRACT_GRANT: NAGW-81
Distribution Limits
Public
Copyright
Other
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