G30.79 FIR 10: a gravitationally bound infalling high-mass star-forming clump

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Table 3:

Normalized velocity difference.
Line	$\Delta V_{{\rm be}}$
HCN $(J=4 \rightarrow 3)$	-1.1
HCO $^{+}(J=4 \rightarrow 3)$	-1.2
CS $(J=7\rightarrow 6)$	-0.1

Notes. The asymmetry of line profiles is presented by the calculation of $\Delta V_{{\rm be}}$ , as shown in Eq. (4), where the optically thin species correspond to H¹³CO⁺ for HCO⁺ and H¹³CN for HCN and CS. The values used to compute the blue excess are taken from Gaussian fits to the corresponding spectra.

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