Figure 1.
![[Top left] Overlay of integrated intensity from ${v_{\rm LSR}}=30$ to 70 km s$^{-1}$ of the $^{12}$COline emission in green and $^{13}$CO in red of the Sgr-B molecular cloud. [Top right] Moment 0, [bottom left] moment 1 and [bottom right] moment 2 in $^{13}$CO line integrated from ${v_{\rm LSR}}=10$ to 90 km s$^{-1}$. The horizontal broad feature is the contamination of Arm ii at ${v_{\rm LSR}} \sim 80$ km s$^{-1}$. Note the difference from top-left panel, where the integration is from 0 to 70 km s$^{-1}$ in order to avoid contamination of Arm ii.](https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/mnras/532/4/10.1093_mnras_stae1724/1/stae1724fig1.jpeg?Expires=1748900321&Signature=JvQdxz2ipnlkTIRTRRSqFEwPmc~-~0ttJQSZ7eqz~nyS-EDISfbnTFXEkfIK1iml08kAKbslGSH4NwoiKcX~pYoxifc61jkThxlTjatkokZLNXrVv8gyn9ZIo4jhloLPioGf1m-ORdNZKWUQ04PKiy~k9U-JESmwKhaibhZnzk5QuzUtUvJgfGfKmXc~xshlxkc-gE3t2QQlOS16yb2pYFYt2bxzQI-6Ypz6olXvyPdnzQN3aJLlsTus43S2t32URieJJbFoGhXJlBPxROFmQA3VllagswWdW9bI2NO-AP~vLVgmWEr2i5vgXkcPjIZIJYyMM8AABcguFIWwgKz5pw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
[Top left] Overlay of integrated intensity from |${v_{\rm LSR}}=30$| to 70 km s|$^{-1}$| of the |$^{12}$|COline emission in green and |$^{13}$|CO in red of the Sgr-B molecular cloud. [Top right] Moment 0, [bottom left] moment 1 and [bottom right] moment 2 in |$^{13}$|CO line integrated from |${v_{\rm LSR}}=10$| to 90 km s|$^{-1}$|. The horizontal broad feature is the contamination of Arm ii at |${v_{\rm LSR}} \sim 80$| km s|$^{-1}$|. Note the difference from top-left panel, where the integration is from 0 to 70 km s|$^{-1}$| in order to avoid contamination of Arm ii.
