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Fig. 11

Crest-averaged centroid velocity as a function of the right-ascension offset Xoffset from the crest of filament 8. This shows that the mean transverse velocity gradient observed across filament 8 is ~ 2.17 ± 0.27 km s−1 pc−1 on the eastern, blue-shifted side and ~ 0.74 ± 0.09 km s−1 pc−1 on the western, red-shifted side.
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