Deuteration around the ultracompact HII region Monoceros R2

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Table 3

DX/HX ratio comparison.

	Mon R2^a		Ori Bar^b	TMC1^c	Barnard 1^d	IRAS 16293^e	Ori KL^f

	IF	MP2	(Clump 3)

H¹³CN/HN¹³C	10	2.33	2.5	0.9–1.5	1.04	...	...
DCN/HCN	0.02	0.03	0.01	0.008	0.025	0.01	...
DNC/HNC	0.01	0.02	< 0.01	0.01	0.11	...	...
DCO⁺/HCO⁺	0.2 × 10^-2	0.5 × 10^-2	0.6 × 10^-3	0.01	...	0.7 × 10^-2	0.14
C₂D/C₂H	0.02	0.08	< 0.11	0.03–0.06	...	...	...
HDCO/H₂CO	0.01	0.01	0.6 × 10^-2	0.05	0.14	0.15	0.14
D₂CO / HDCO	< 38.47	1.00	...	...	0.40	0.3	0.021
N₂D⁺/ N₂H⁺	0.015	< 5.0 × 10^-2	...	0.08	0.35	...	< 0.30
NH₂D / NH₃	0.39 × 10^-2	0.6 × 10^-2	...	0.02	0.63	...	0.062

Notes.

^(*)

From the component at 12 km s^-1.

^(a)

This work.

^(b)

Parise et al. (2009).

^(c)

Turner (2001).

^(d)

Daniel et al. (2013); Gerin et al. (2001), Marcelino et al. 2005.

^(e)

Lis et al. (2001); Loinard et al. (2000, 2001); Tiné et al. (2000).

^(f)

Turner 1990.

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