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Fig. 4

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Channel maps of CO(2–1) emission for the northern (top, color-coded blue) and southern (bottom, color-coded red) ALMA fields. For each field, the maps cover the 20 km s-1-wide range shaded with color in Fig. 2. The velocity range of each map, after correction for a jet velocity of 37.5 km s-1, is indicated in the top row in units of km s-1. First contour and step are 20% of the map emission peak, which is indicated for each panel in the bottom left corner in units of K km s-1. The dashed ellipses delineate the approximate boundary of the emission. The emission from SW to NE is gradually displaced as the velocity increases.

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