Gas lines from the 5-Myr old optically thin disk around HD 141569A - Herschel observations and modeling

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Table 3

Molecular data of the lines.

Line	Wavelength	E_up/k^a	n _crit ^b	A ^c
	(μm)	(K)	(cm^-3)	(s^-1)

Oi³PP₂	63.183	227.72	4.7 × 10⁵	8.87 × 10^-5
Oi³PP₁	145.525	326	1.0 × 10⁵	1.74 × 10^-5
Cii²PP_1/2	157.740	91.22	2.8 × 10³	2.4 × 10^-6

Notes.

^(a)

The energy of the upper state of the transition relative to the ground state in temperature.

^(b)

The critical density is A/γ, where A is the Einstein-A coefficient and γ the collision rate coefficient. The critical densities are computed assuming LTE, T_kin = 100 K and the optically thin limit.

^(c)

Einstein-A coefficients were taken from Galavis et al. (1997).

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