Physics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...77..109j&link_type=abstract
Solar Physics, vol. 77, Apr. 1982, p. 109-119.
Physics
5
Energy Spectra, K Lines, Maxwell-Boltzmann Density Function, Normal Density Functions, Solar Prominences, Velocity Distribution, Calcium, Least Squares Method, Line Of Sight, Magnetohydrodynamic Turbulence, Spectral Resolution
Scientific paper
Data from a large quiescent prominence (May 30, 1978 at 55 deg N, 90 deg E) are utilized to show that the observed line-of-sight velocity component distributions may be interpreted in terms of Gaussian distributions of velocities in the frame of reference of the prominence. Maxwell distributions for speed and for one component of the velocity are derived and an expression for the energy spectrum of the longitudinal component is stated. The range in observed velocities varies considerably among the prominences, and considerable deviations from Gaussian distributions are apparent for the smallest velocities. This distortion is apparent in the slope of the energy spectrum, a parameter that may be used as a rough measure of spectral resolution. If there is MHD turbulence, a characteristic relationship should exist between velocity and eddy size. When supersonic velocities are present, compressibility effects may severely alter this relationship. The possibility of observational confirmation is discussed.
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