Nitrogen chemistry and depletion in starless cores

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Table 3:

Fractional abundances of CN, HCN, HNC and relative to H towards the dust emission peaks of our source sample. Tables D.1-D.5 give the fractional abundances toward all the observed positions.
Source	[CN]	[HCN]	[HNC]	[H₂N⁺]	[NO]^a	CN:HCN	HNC:HCN
	-9	-9	-9	-10	-9
L 183	0.40	0.17	0.45	0.78	10.0	2.4	2.6
L 1544	1.11	0.56	1.12	1.20	4.0	2.0	2.0
Oph D	0.37	0.23	0.38			1.6	1.7
L 1517B	1.12	0.48	1.50			2.3	3.1
L 310	4.40	1.50	2.50			2.9	1.6

Notes. $\rm [X]=n(X)/2n(\hh)$ . An isotopic ratio $\twc{:}\thc=68$ was assumed when using the isotopologues. A global uncertainty (including statistical and systematic errors) of 40% is assumed. ^(a) The abundance of NO is taken from A07.

Source LaTeX | All tables | In the text

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