Fig. 1

Kubo number, K, in the region of (λz,λ ⊥ ) space allowed by observations, bounded by λ ⊥ = W0 (solid horizontal line), λz = L0 (solid vertical line) and δB/B0 = 1 (solid curve). Kubo number K increases downwards in the figure. The thick black line shows K = 0.467, and the three coloured lines are drawn for K = 0.14, 1 and 4.67.
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