Open Access
Fig. B.1.
Keplerian masks (top row) overlaid on (from top to bottom) the HCN (main feature and weak hf line at 345507.455 MHz), H13CN, and HC15N, channel maps. The masks (top row) were obtained for a threshold of 40 mJy beam−1 applied to the weak hf transition at 354507.455 MHz.
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