Nitrogen chemistry and depletion in starless cores

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Table C.1:

Conversion factor, N₀ (in 12/()), at an excitation temperature $T_{\rm ex}=8$ K (see Eq. (C.2)).
Molecule	Transition	$\nu$ ^a	$\delta v$ ^b	$\beff$ ^c	B	$\mu_0$	R.I.^d	Q^e	$N_0/\rm R.I.$
		MHz			MHz	debye
CN		113520.414	0.052	0.74	56 693.470	1.45	0.0184	3.3	293
CN		226882.000	0.053	0.50
HCN		88633.936	0.066	0.77	44 315.976	2.9852	0.1111	4.1	16.4
		108780.201	0.063	0.77	54 353.130	1.45	0.194	3.4	29.5
H		86342.251	0.054	0.75	43 170.127	2.9852	0.5556	4.2	3.4
HN		87090.850	0.068	0.78	45 331.980	3.05	1.000	4.0	1.7
HC		86054.9664	0.067	0.78	43 027.648	2.9852	1.000	4.2	1.9
		93171.621	0.068	0.78	46 586.880	3.40	0.037	3.9	35.2

Notes. ^(a) Frequency of the HFS component considered for which we compute the flux W. ^(b) Spectral resolution in . ^(c) Beam efficiency. The forward efficiency at 3 mm is $\feff=0.95$ , and 0.91 at 1.3 mm. ^(d) Relative intensity of the HFS component. The total flux in Eq. (C.2) is $\ensuremath{W_{\rm tot}} =W/$ R.I. ^(e) Partition function computed as $Q=\dsum_{J=0}^{20}(2J+1)\exp^{-\frac{hBJ(J+1)}{k_{\rm B}T_{\rm ex}}}$ , where B is the rotational constant.

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