A 3D MHD Solar Wind Model With Pickup Protons: Comparison With Voyager Data

Details A 3D MHD Solar Wind Model With Pickup Protons: Comparison With Voyager Data A 3D MHD Solar Wind Model With Pickup Protons: Comparison With Voyager Data

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh51a1201u&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH51A-1201

Physics

2134 Interplanetary Magnetic Fields, 2152 Pickup Ions, 2164 Solar Wind Plasma

Scientific paper

We compute the global three-dimensional steady-state structure of the solar wind and interplanetary magnetic field from the base of solar corona to 100~AU and compare the simulated plasma and magnetic field parameters with Voyager~1 and 2 measurements. Our tilted-dipole model of the solar corona and solar wind is appropriate for solar minimum conditions and assumes a uniform distribution of neutral hydrogen throughout the heliosphere. The inclusion of the pickup protons causes a deceleration of the solar wind and an increase in average plasma temperature with heliocentric distance. The three-dimensional character of the model allows us to study both radial and latitudinal effects. The model is consistent with the changes in the proton temperature observed by Voyager~2 as it moves to higher southern latitudes in the outer heliosphere.

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