Herschel spectroscopic observations of the compact obscured nucleus in Zw 049.057

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Table 4

Derived H₂O column densities and abundances, and column density ratios.

C ^a	N_H₂O/τ₅₀^b^c	χ_H₂O^d	OH/H₂O^b,e	¹⁶O/¹⁸O^b^e
	(cm^-2)

C_core	(0.5−2) × 10¹⁸	(2.5−10) × 10^-6	0.4−0.8	50−100
C_outer	(2−8) × 10¹⁷	(1−4) × 10^-6	0.1−0.4	50−100

Notes.

^(a)

Component.

^(b)

Independent parameter.

^(c)

Column densities per unit of dust opacity at 50 μm, τ₅₀.

^(d)

Estimated H₂O abundance relative to H nuclei.

^(e)

Column density ratios.

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