The physical conditions in IRDC clumps from Herschel/HIFI observations of H2O

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Table 11

Dynamic structures within IRDC clumps.

Component	Properites	Tracer

Quiescent envelope	ΔV< 3 km s^-1 at systemic V	HO, N₂H⁺, NH₃^a, C¹⁷O^b
Envelope	ΔV from 3 to 7 km s^-1 at systemic V	CH₃OH, C³⁴S, CCH, C¹⁷O^b
Infall	ΔV from 3 to 7 km s^-1 redshifted V	H₂O absorption
Outflow	ΔV> 7 km s^-1at systemic velocity	H₂O emission

Notes.

^(a)

From Pillai et al. (2006a).

^(b)

C¹⁷O is broader than 3 km s^-1 for the NH₃ positions.

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