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Fig. 22

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Two-dimensional density distribution of observed local filament curvatures C in comparison to H I polarization fraction. Top: high latitude sky. Middle: selected fields with strong H I anisotropies and associated radio-polarimetric filaments (Kalberla & Kerp 2016; Kalberla et al. 2017). Bottom: two-dimensional density distribution of spurious H I polarization derived by modeling a random distribution of orientation angles along the line of sight.

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