Open Access

Fig. B.1

image

Line profiles of the J = 1 → 0 (top row) and J = 3 → 2 (bottom row) transitions of HCN computed with ALICO for different velocity profiles: static (left panels), uniform inward motion with V (r) = − 0.05 km s−1 (middle panels), and our best-fit profile from Eq. 5 (right panels).

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