Physics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9518781w&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Nov. 1, 1990, p. 18781-18790.
Physics
6
Ion Temperature, Shock Heating, Shock Wave Propagation, Solar Corona, Coronal Holes, Magnetohydrodynamic Flow, Rankine-Hugoniot Relation
Scientific paper
The coronal slow shock has been predicted to exist embedded in large coronal holes at 4-10 solar radii. In this paper, a three-fluid model is used to study the jumps in minor ion properties across a slow shock such as the coronal slow shock. The jump conditions are formulated in the de Hoffmann-Teller frame of reference. The Rankine-Hugoniot solution determines the MHD flow and the magnetic field across the shocks. For each minor ion species, the fluid equations for the conservation of mass, momentum, and energy can be solved to determine the velocity and the temperature of the ions across the shock. Also obtained is a similarity solution for heavy ions. The results show that, on the downstream side of the slow shock, the ion temperatures are nearly proportional to the ion masses for He, O, Si, and Fe, in agreement with observed ion temperatures in the inner solar wind. This indicates that the possibly existing coronal slow shock can be responsible for the observed heating of minor ions in the solar wind.
Ogilvie Keith. W.
Whang Yun C.
Zhao Xuepu
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