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The fine structure of the velocity field in a 2B/M2.3 importance flare

  • Solar Physics
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Abstract

This paper investigates the velocity field in the flare region during the impulsive phase of the 2B/M2.3 importance solar flare of June 26, 1999. Spectral H α observations of the flare with high temporal and spatial resolution were made with the KG-2 coronograph of the Crimean Astrophysical Observatory. Velocities are estimated by the bisector method. The velocity field in the flare region and flare kernel during the impulsive phase are found to be very complex, have a fine structure, and alter rapidly with time. Different elements of the flare exhibit line shifts of different magnitude and even different directions. This means that there are local Doppler motions in the fine structural elements of the flare.

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Authors and Affiliations

  1. Research Institute Crimean Astrophysical Observatory, Nauchnyi, Crimea, 98409, Ukraine

    A. N. Babin & A. N. Koval’

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  1. A. N. Babin
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  2. A. N. Koval’
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Original Russian Text © A.N. Babin, A.N. Koval’, 2010, published in Kinematika i Fizika Nebesnykh Tel, 2010, Vol. 26, No. 3, pp. 50–57.

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Babin, A.N., Koval’, A.N. The fine structure of the velocity field in a 2B/M2.3 importance flare. Kinemat. Phys. Celest. Bodies 26, 130–134 (2010). https://doi.org/10.3103/S0884591310030049

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