Two problems regarding slow shocks in the solar wind will be studied. The first deals with the formation of shocks associated with coronal mass ejections (CME). Under various coronal conditions, it should be possible to learn from the formation process about the nature of CME associated shocks, whether they are slow shocks, fast shocks, or a combination of both. It will be shown that the nature of the shocks and the shock strengths are functions of a dimensionless momentum impact parameter lamda, the plasma beta value and the shock angle theta. The next step will be a systematic study of MHD shocks in the lamda, beta, theta space using a planar shock geometry. The final step will be a study of the formation of MHD shocks with curved shock geometries. The second problem concerns the three dimensional slow shock reconnection process. The third dimension of the model adds a new degree of freedom to the flow system, such that it is possible to obtain exact numerical solutions to the MHD equations for the slow shock reconnection. The existence of exact solutions means that the reconnection configuration is consistent with the governing equations of magnetohydrodynamics, and from the exact solutions, one can derive quantitative relationships among various parameters such as the rate of reconnection, the plasma beta value, etc. ***

Agency
National Science Foundation (NSF)
Institute
Division of Atmospheric and Geospace Sciences (AGS)
Application #
9012366
Program Officer
Kenneth H. Schatten
Project Start
Project End
Budget Start
1990-08-01
Budget End
1994-01-31
Support Year
Fiscal Year
1990
Total Cost
$200,000
Indirect Cost
Name
Catholic University of America
Department
Type
DUNS #
City
Washington
State
DC
Country
United States
Zip Code
20064