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- W2553560328 abstract "Formation of small-scale fluctuations in plasma density of turbulent flows in active regions (plages) of the photosphere and dependence of their characteristics on the magnetic field strength B are considered in the present paper. The process is described in the framework of three-fluid approach. Taking into account a low degree of ionization of the gas in the photosphere, we assume that ion-electron plasma is embedded in the flow of gas and has no influence on its motion. We also assume that the statistics of random velocity field of gas corresponds to the Kolmogorov turbulence. For analysis of the effect of magnetic field on the plasma density fluctuations, analytic expressions describing their spatial spectrum and RMS level are derived. Estimations of the spectral shape and the fluctuation level are made for the photosphere near 300 km altitude under the strength B from 100 to 1000 G. It is shown that the RMS amplitude of fluctuations (with length-scales smaller than 100 km) around the mean plasma density has to increase from 8.23 to 8.79 % with the magnetic field strength. The spatial spectrum can be approximated by a power law and the power index has to increase from -1.57 (B=100 G) to -1.20 (B=1000 G)." @default.
- W2553560328 created "2016-11-30" @default.
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- W2553560328 date "2012-08-01" @default.
- W2553560328 modified "2023-10-17" @default.
- W2553560328 title "Plasma Density Fluctuations in Turbulent Flows of Active Regions at the Solar Photosphere" @default.
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