Modeling the H2O submillimeter emission in extragalactic sources

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Table 2

Model parameters.

Parameter	Explored range	Best fit to
		HII+mild AGN^a

T_dust (K)	35−115	45−75
τ ₁₀₀	0.02−12	0.05−0.2
N_H₂O/ΔV (cm^-2/(km s^-1))	3 × 10¹⁴−10¹⁶	(0.5−2) × 10¹⁵
ΔV^c (km s^-1)	100	^b
n_H₂ (cm^-3)	2 × 10⁴−3 × 10⁵	≲ 3 × 10⁵
T_gas (K)	100−200	^b

Notes.

^(a)

Best fit values for HII+mild AGN sources (optically classified star-formation dominated galaxies with possible mild AGN contribution, see Y13 and Sect. 5) for which lines 2−6 are detected, but lines 7−8 are undetected.

^(b)

Parameter not well constrained.

^(c)

FWHM velocity dispersion of the dominant H₂O emitting structures, in our models equal to 1.67V_turb.

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