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EP: Fachverband Extraterrestrische Physik

EP 9: Sonne und Heliosphäre II

EP 9.5: Talk

Friday, March 1, 2013, 10:30–10:45, HS 9

On the heating and acceleration of the solar wind due to modified plasma wave spectra — Bidzina Shergelashvili and •Horst Fichtner — Ruhr-Universität Bochum, Institut für Theoretische Physik IV, Universitätsstrasse 150, 44780 Bochum

A new aspect of the turbulent heating and acceleration of the solar wind is investigated. A physical meaning of the lower boundary of the Alfven wave turbulent spectra in the solar atmosphere and the solar wind is studied and its significance is demonstrated. Via an analytical and quantitative treatment of the problem we show that a truncation of the wave spectra from the lower frequency side, which is a consequence of the solar magnetic field structure and its cyclic changes, results in a significant reduction of the heat production and acceleration rates, particularly at low heliographic latitudes being consistent with slow solar wind emanating from these regions.