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The oscillating loop prominence of July 17, 1981

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Abstract

Oscillatory motions of a loop prominence observed on July 17, 1981 are analysed. The oscillations were mainly horizontal, with a period of 8 min. Restoring force was a result of magnetic tension, and assuming a simplified magnetic field configuration the expression for frequencies of oscillations is derived and compared with the observations. Taking the observed period, the strength of the magnetic field permeating the prominence is estimated as 45 G. Finally, the stability of the prominence is discussed.

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  1. Hvar Observatory, Faculty of Geodesy, University of Zagreb, Zagreb, Yugoslavia

    B. Vršnak

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  1. B. Vršnak
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Vršnak, B. The oscillating loop prominence of July 17, 1981. Sol Phys 94, 289–297 (1984). https://doi.org/10.1007/BF00151319

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  • DOI: https://doi.org/10.1007/BF00151319

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