Self-consistent Simulations of Alfven Wave Driven Winds from the Sun and Stars

Abstract

We review our recent results of Alfven wave-driven winds. First, we present the result of a self-consistent 1D MHD simulations for solar winds from the photosphere to interplanetary region. Here, we emphasize the importance of the reflection of Alfven waves in the density stratified corona and solar winds. We also introduce the recent HINODE observation that might detect the reflection signature of transverse (Alfvenic) waves by Fujimura & Tsuneta (2009). Then, we show the results of Alfven wave-driven winds from red giant stars. We explain the change of the atmosphere properties from steady coronal winds to intermittent chromospheric winds and discuss how the wave reflection is affected by the decrease of the surface gravity with stellar evolution. We also discuss similarities and differences of accretion disk winds by MHD turbulence.

26 pages, 12 figures, submitted to special issue (BUKS 2009) of Space Science Review

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Cited by in corpus (7)

• Damping of Alfven waves by Turbulence and its Consequences: from Cosmic-Rays Streaming to Launching Winds
• Multi-fluid approach to high-frequency waves in plasmas. III. Nonlinear regime and plasma heating
• Nonlinear evolution of short-wavelength torsional Alfven waves
• Stirring the Base of the Solar Wind: On Heat Transfer and Vortex Formation
• The detection of upwardly propagating waves channelling energy from the chromosphere to the low corona
• Rotational evolution of young-to-old stars with data-driven three-dimensional wind models
• The winds of young Solar-type stars in Coma Berenices and Hercules-Lyra