期刊
ASTROPHYSICAL JOURNAL
卷 743, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/743/2/197
关键词
solar wind; Sun: corona; turbulence; waves
资金
- NASA [NNX11AJ37G]
- NSF [AGS-0851005, ATM-0752503]
- NSF/DOE [AGS-1003451, PHY-0812811]
- DOE [DE-FG02-07-ER46372]
- Direct For Mathematical & Physical Scien [0812811] Funding Source: National Science Foundation
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [1003451] Funding Source: National Science Foundation
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [0851005] Funding Source: National Science Foundation
- Division Of Physics [0812811] Funding Source: National Science Foundation
We develop a one-dimensional solar-wind model that includes separate energy equations for the electrons and protons, proton temperature anisotropy, collisional and collisionless heat flux, and an analytical treatment of low-frequency, reflection-driven, Alfven-wave (AW) turbulence. To partition the turbulent heating between electron heating, parallel proton heating, and perpendicular proton heating, we employ results from the theories of linear wave damping and nonlinear stochastic heating. We account for mirror and oblique firehose instabilities by increasing the proton pitch-angle scattering rate when the proton temperature anisotropy exceeds the threshold for either instability. We numerically integrate the equations of the model forward in time until a steady state is reached, focusing on two fast-solar-wind-like solutions. These solutions are consistent with a number of observations, supporting the idea that AW turbulence plays an important role in the origin of the solar wind.
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