Topical Issue - Space climate: The past and future of solar activity
Open Access
Research Article

Fig. 4


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Dependence of the dynamo effectivity range λR (left) and the amplitude A (right) of the asymptotic dipole contribution factor of bipolar sources on selected parameter combinations in various SFT model setups for σ0 = 6°. In the left-hand panel the solid line shows the analytic result (22) in the low-latitude Cartesian limit, while the dashed line shows a fiducial analytic fit of the type (26). In the right-hand panel the shaded region is the range expected for a sin n λ equilibrium polar field profile with n > 7; the horizontal line marks the value for n = 8.