Herschel-HIFI view of mid-IR quiet massive protostellar objects

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Table 7

HO integrated line intensity ratios (not corrected for different beam sizes) for all sources for the broad velocity component.

Transitions	Observed ratio					LTE		θ₁/θ₂^a
						(100/300)
	NGC 6334I(N)	W43MM1	DR21(OH)	IRAS 16272	IRAS 05358	Thin	Thick

1₁₀−1₀₁/ 2₁₂−1₀₁			0.56 ± 0.06		0.20 ± 0.08	0.6/0.4	1.3/1.1	3.0
1₁₁−0₀₀/ 2₀₂−1₁₁			1.03 ± 0.05	0.9 ± 0.1	0.56 ± 0.06	2.4/1.7	1.3/1.1	0.9
(m)					1.2 ± 0.3
2₁₁−2₀₂/ 2₀₂−1₁₁	1.14 ± 0.05	1.04 ± 0.06	0.88 ± 0.05	0.94 ± 0.05	0.60 ± 0.05	1.4/1.8	1.2/1.1	1.3
(m)			0.38 ± 0.05	3.0 ± 0.1	0.70 ± 0.06

Notes. If available, the ratio for the medium-velocity component is given and noted (m). Optically thin and thick ratios are calculated for T_ex = 100 and 300 K.

^(a)

Beam size ratio.

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