Channel maps of the SO 4₄ − 3₃ line. The channels at 8 and 10 km s⁻¹ primarily trace the molecular outflow and the streamer, respectively. The green line in the 10 km s⁻¹ channel is the fit to the one-arm spiral tracing the streamer in HCO⁺ (Yen et al. 2019). The white contours indicate the 3σ and 5σ confidence levels, where 1σ corresponds to 0.3 mJy beam⁻¹. We note that the position of the disk is off center with respect to the center of the channel maps.