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Magnetic field and doppler velocity correlation in quiescent solar prominences
Authors:V Yu Klepikov
Institution:1. Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moscow Region
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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