Surface Alfven Wave Damping in a 3D Simulation of the Solar Wind

Details Surface Alfven Wave Damping in a 3D Simulation of the Solar Wind Surface Alfven Wave Damping in a 3D Simulation of the Solar Wind

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh51b1600e&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH51B-1600

Physics

7509 Corona, 7524 Magnetic Fields, 7959 Models

Scientific paper

It is known that a source of additional momentum is needed to drive the solar wind. Here we investigate the effect of surface Alfvén wave damping in solar minima and solar maxima conditions. The surface Alfvén wave damping length L depends on the superradial expansion factor S of magnetic field lines. We calculate S for Carrington Rotation 1912 with a steady state solar background generated with the Space Weather Modeling Framework, and compare with estimates by Dobrzycka et al. 1999 using SOHO observations. We estimate the surface Alfvén wave damping for active regions, quiet sun, and the border between open and closed magnetic field lines. We address how our results can be incorporated in a MHD thermally driven-wind model.

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