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Optical properties of bipolar flare kernels associated with asymmetric magnetic loops

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Abstract

Observations are presented for nine flares containing two principal patches of emission, or kernels, in which the kernel associated with weaker magnetic field has the greater Hα line width. The observations are interpreted in terms of an asymmetric bipolar magnetic loop from which high energy electrons precipitate predominantly at the loop footpoint of weaker field. Calculations are presented which indicate that, for an isotropic distribution of electron velocity vectors at their initial point of injection, the observations are consistent with a location for the injection in the upper part of the loop. The same type of model predicts the associated microwave burst to be stronger near the opposite (strong field) footpoint (Kundu and Vlahos, 1979).

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Authors and Affiliations

  1. Air Force Geophysics Laboratory, Sacramento Peak Observatory, 88349, Sunspot, NM, U.S.A.

    Donald F. Neidig

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  1. Donald F. Neidig
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Operated by the Association of Universities for Research in Astronomy, Inc. under contract with the National Science Foundation.

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Neidig, D.F. Optical properties of bipolar flare kernels associated with asymmetric magnetic loops. Sol Phys 70, 129–135 (1981). https://doi.org/10.1007/BF00154396

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  • DOI: https://doi.org/10.1007/BF00154396

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