C4H(24–23) and CN(2–1) emissions at the star velocity (V∗ = −26.5 km s-1), observed with ALMA (HPBW 0.34′′ × 0.31′′), compared to the CO(2–1) emission. The cyan color contours correspond to the 0.25 Jy beam-1 level from the CN map. The star indicates the position of CW Leo⋆. The white circular arc on the upper frame is a fit to the bright southern arc; it is centred 0.6′′ E, 2.6′′ S of CW Leo⋆.
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