Tilt Angle degrees

Fig. 2.39.1. Electron differential intensity at 1.94 GeV as a function of tilt angle a, shown in the equatorial plane (0 = 90°) for A > 0 and A < 0 polarity epochs. Solutions are shown at 1 AU, 5 AU and 80 AU for different values of K_q : panels (a), (c) and (e) with b = 0.05 and panels (b), (d) and (f) with b = 0.15 in Eq. 2.39.3. From Ferreira et al. (1999b).

The process was repeated for 0.30 GeV electrons and the results are shown in Fig. 2.39.2.

Fig. 2.39.2. As in Fig. 2.39.1, but for 0.30 GeV electrons. From Ferreira et al. (1999b).

Qualitatively, Fig. 2.39.2 shows a similar response to changes in k__q and no significant deviations occur with the changing a compared to Fig. 2.39.1. The crossover shown in Fig. 2.39.1 now occurs at r > 5 AU. Quantitatively, the a dependence of the A > 0 intensities is less linear and the differences between the two epoch solutions are evidently larger than for the higher electron energies shown in Fig. 2.39.1.

Fig. 2.39.3 shows solutions as in Fig. 2.39.2 except that they were obtained at 0 = 5° to illustrate what happens to the a dependence of the solutions in the polar regions of the Heliosphere.

Fig. 2.39.3 shows solutions as in Fig. 2.39.2 except that they were obtained at 0 = 5° to illustrate what happens to the a dependence of the solutions in the polar regions of the Heliosphere.

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