Magnetic field and doppler velocity correlation in quiescent solar prominences |
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Authors: | V Yu Klepikov |
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Institution: | 1. Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moscow Region
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Abstract: | Analyzing statistically the magnetic and Doppler velocity data for 85 quiescent prominences observed in 1983–1987 by Nikolsky's magnetograph, we came to the following preliminary conclusions: The average longitudinal magnetic field of the prominence determines the dynamic velocity of the latter: the stronger magnetic fields correspond to the higher Doppler velocities. A longitudinal magnetic field less than 25 G allows the material to move with arbitrary velocity within the limits of several kilometers per second. A magnetic field higher than 25 G suppresses such movements. The horizontal length of the flux tube exceeds its vertical part by 1.5 orders of magnitude (the upper limit). There is an angle of 10°between the horizontal component of the velocity vector in quiescent prominences and the long axis of the filament. The maximum velocity in quiescent prominences is about 7 km/s. |
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