Intensities of molecular lines in the PVDs along the SW slice. The SW slice is marked by the dashed black line in Fig. 1a, on which the black arrow shows the positive direction of the position. (a) CO(1–0) PVD. The gray contours are drawn at ∼[1.5, 10, 25] K. The dashed white profiles in panels a, b, and c outline the outflow in the SW streamer region. (b) ¹³CO(1–0) PVD. The gray contours are drawn at ∼[0.1, 0.9, 2.3] K. (c) HCN(1–0) PVD. The gray contours are drawn at ∼[0.1, 0.9, 3.2] K. (d) H¹³CN(1–0) PVD. The gray contours are drawn at ∼[0.03, 0.25] K. (e) SiO(2–1) PVD. The gray contours are drawn at ∼[0.03, 0.25] K. (f) CH₃OH(2_k–1_k) PVD. The gray contours are drawn at ∼[0.03, 0.25] K.