Fig. 8
Left panel: difference between polarization angles θpol and position angles of the total gradients θG for each core (N2D+ – red circles, N2H+ – blue squares, DCO+ – orange flipped triangles, H13CO+ – green triangles, and C18O – black diamonds). Right panel: difference between θpol and a set of random angles θrandom from 0 to 90°. Grey strip corresponds to parallel directions ± 10°; cyan strip corresponds to perpendicular directions ± 10°.
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