Anisotropic solar cosmic ray propagation in an inhomogeneous medium,II |
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| Authors: | Leonard F Burlaga |
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| Institution: | (1) Laboratory for Space Sciences, NASA-Goddard Space Flight Center, Greenbelt, Md., U.S.A. |
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| Abstract: | The author's model for anisotropic solar cosmic ray propagation gives 2 coupled, partial differential equations for the intensity and anisotropy of solar cosmic rays propagating with finite speed V in an inhomogeneous medium. The model is used to study the effect of the solar shell on solar cosmic ray propagation. It predicts an exponential decay, regardless of the observer's position. It predicts that when the observer is near the center of the shell, t
D/t
0  20 to 30, (t
D= decay time, t
0 = onset time) and A
m(anisotropy) 15%, if t
m/t
0 3 to 5 (t
m= time of maximum), consistent with observations of relativistic particles on Feb. 23, 1956. When the observer is between the shell and the sun, the model predicts that oscillations might be observed near maximum intensity. When the observer moves away from the sun and the shell, the propagation is diffusive, but there is an increasingly large persistent anisotropy which serves as a measure of the width of the shell. |
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| Keywords: | |
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