Motions of chromospheric and photospheric material in a solar flare

Physics

Scientific paper

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Scientific paper

The line-of-sight velocity of the motions of chromospheric and photospheric matter during the solar flare of September 7, 1990 is analyzed. The spectrograms were obtained using the horizontal solar telescope ATsU-26 of the Terskol Observatory. The chromospheric line alpha and the Fraunhofer lines formed in the upper and middle photospheric layers are used for measurements. A downflow motions with height-dependent velocities were observed in the chromosphere and photosphere during the flare. The largest velocity were measured in the chromospheric layers.

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