On the low-frequency boundary of Sun-generated MHD turbulence in the slow solar wind

Details On the low-frequency boundary of Sun-generated MHD turbulence in the slow solar wind On the low-frequency boundary of Sun-generated MHD turbulence in the slow solar wind

2012-04-14

arxiv.org/abs/1204.3189v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

12 pages, 4 figures, Accepted to ApJ

Scientific paper

New aspects of the slow solar wind turbulent heating and acceleration are investigated. A physical meaning of the lower boundary of the Alfv\'en wave turbulent spectra in the solar atmosphere and the solar wind is studied and the significance of this natural parameter 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. An appropriate analysis is presented regarding the link of the considered problem with existing observational data and slow solar wind initiation scenarios.

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