An Alfven wave-driven solar wind

Details An Alfven wave-driven solar wind An Alfven wave-driven solar wind

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spub.reptq....j&link_type=abstract

Conference Paper, Sao Paulo Univ. Brazil Inst. Astronomico e Geofisico.

Astronomy and Astrophysics

Astronomy

Interplanetary Medium, Magnetohydrodynamic Waves, Solar Wind, Spectrum Analysis, Energy Spectra, Solar Corona, Solar Flux Density, Stellar Structure, Solar Wind Velocity, Sun, Plasma Turbulence, Astronomical Spectroscopy, Plasma Temperature

Scientific paper

Observations of the solar wind show magnetohydrodynamic waves in the Interplanetary Medium (IM), that may be locally generated, or come from the Sun. An analysis of the spectra gives the second option as the most acceptable near the Sun, but a fraction can be generated locally. We suggest that an energy flux spectrum, initially a power law, evolves into the IM. As we damp the flux in order to produce a corona near the Sun we expect that this damping gives rise also to the evolution of the flux spectrum. Our results show a spectral break for the wave flux, and magnetic fluctuations, in accordance with the observations. We modify the model in order to obtain a dependence on the gas mixtures. This simple model produces a coronal temperature, solar wind velocity, spectral break, and a power density compatible with observations.

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