Fig. A.1
Channel maps of CN hyperfine components towards DM Tau. From top to bottom, the velocity scales are referred to 226.874745 GHz (3 blended components), 226.679382 GHz, 226.663703 GHz, and 226.659575 GHz. Note the better spectral resolution in the top panel. The spatial resolution is 1.7 × 1.2″ at PA 120°, contour spacing is 53 mJy/beam, or 0.61 K, corresponding to 2.0σ in the upper panel, and 2.3σ in the lower ones.
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