Specific angular momentum (top panel) and velocity gradient (bottom panel) at different radii traced by the available molecular line data. Small red and blue stars correspond to the H13CO+ and C17O ALMA line data presented in this work, respectively. Black five-point stars: NH3 (1,1) and CS (2–1) line data from Little et al. (1985). Black filled circles: H13CN (1–0) and H13CO+ (1–0) line data from Gibb et al. (2003). Black eight-point star: C18O (2–1) line data from López-Sepulcre et al. (2009).
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