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Fig. A.2
HCN(1–0) and HCO+(1–0) stacking of the south-east positions. The stacking is based on the 13CO velocities. The top (bottom) panel shows the stacking corresponding to >–300 km s-1 (<–300 km s-1) velocities. The velocities are shown in the rest-frame frequency of the HCO+(1–0) line.
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