Terahertz ammonia absorption as a probe of infall in high-mass star forming clumps

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Table 1

Ammonia source sample and observing parameters.

Source	Stage	RA(J2000)	Dec(J2000)	L_bol	d	S(870 μm)^a	T_sys	t_int
		(h m s)	(° ′ ′′)	(L_⊙)	(kpc)	(mJy/bm)	(K)	(min)

W43-MM1	MIR-quiet core	18 47 47.0	−01 54 28	2.3 × 10⁴^b	5.5^b	21.2	3700	13
G31.41+0.31	hot core	18 47 34.3	−01 12 46	2.6 × 10⁵^c	7.9^c	21.2	3500	6.8
G34.26+0.15	UC HII	18 53 18.6	+01 14 58	4.7 × 10⁵^c	3.7^c	44.7	3500	2.5

Notes.

^(a)

Schuller et al. (2009),

^(b)

Motte et al. (2003),

^(c)

Rolffs et al. (2011).

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