HR: 0800h
AN: SH51A-1201    [Abstracts]
TI: A 3D MHD Solar Wind Model With Pickup Protons: Comparison With Voyager Data
AU: * Usmanov, A V
EM: arcadi.usmanov@gsfc.nasa.gov
AF: University of Delaware, Bartol Research Institute, Newark, DE 19716 United States
AU: * Usmanov, A V
EM: arcadi.usmanov@gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 612.2, Greenbelt, MD 20771 United States
AU: Goldstein, M L
EM: melvyn.l.goldstein@nasa.gov
AF: NASA Goddard Space Flight Center, Code 612.2, Greenbelt, MD 20771 United States
AB: 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.
DE: 2134 Interplanetary magnetic fields
DE: 2152 Pickup ions
DE: 2164 Solar wind plasma
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005