Low levels of methanol deuteration in the high-mass star-forming region NGC 6334I

Free Access

Table 3.

CH₂DOH/CH₃OH and CH₃OD/CH₃OH values derived from ¹³CH₃OH or .

Source	Region	CH₂DOH/CH₃OH		(CH₂DOH/CH₃OH)_corr^a		CH₃OD/CH₃OH		CH₂DOH/CH₃OD^b
		¹²C/¹³C	¹⁶O/¹⁸O	¹²C/¹³C	¹⁶O/¹⁸O	¹²C/¹³C	¹⁶O/¹⁸O
		[%]	[%]	[%]	[%]	[%]	[%]
NGC 6334 I	MM1 I	0.11–0.32	0.06–0.07	0.04–0.11	0.02	1.07	0.36–0.61	0.16–0.19
	MM1 II	0.05–0.17	0.03–0.07	0.02–0.06	0.01–0.02	0.83	0.35–0.42	0.10–0.13
	MM1 III	0.07–0.21	0.06–0.14	0.02–0.07	0.02–0.05	0.45	0.30	0.23–0.29
	MM1 IV	0.04–0.16	0.03–0.07	0.01–0.05	0.01–0.03	0.53	0.25	0.12–0.19
	MM1 V	0.09–0.20	0.04–0.09	0.03–0.07	0.01–0.03	0.50	0.22	0.25
	MM2 I	0.11–0.34	0.13–0.20	0.04–0.11	0.04–0.07	0.44	0.27–0.50	0.38–0.50
	MM2 II	0.03–0.08	0.03–0.06	0.01–0.03	0.01–0.02	0.39	0.30	0.15
	MM3 I	0.05–0.11	0.04–0.10	0.08–0.04	0.01–0.03	0.27	0.24	0.25
	MM3 II	0.05–0.13	0.04–0.11	0.02–0.04	0.01–0.04	0.32	0.27	0.23
Sgr B2^c	N2	0.12	–	0.04	–	<0.07	–	>1.8
Orion KL^d,^e	Compact Ridge	0.58 ± 0.12	–	0.19	–	0.5 ± 0.1	–	1.2 ± 0.3
		(0.08–0.13)	–	0.03–0.04	–		–	0.7 ± 0.3 0.3^f
Orion B^g	HH 212	2.4 ± 0.4	–	0.8 ± 0.1	–	–	–	–
IRAS 16293–2422^h	B	–	7.1ⁱ	–	2.4ⁱ	–	1.8	3.9

Notes.

Ranges of CH₂DOH/CH₃OH and CH₃OD/CH₃OH correspond to the range in column density of ¹³CH₃OH, and CH₂DOH with and without blending. All CH₂DOH/CH₃OH values include the vibrational correction of 1.25 as well as the uncertainy in the line strength.

^(a)

Corrected for statistical weight of the location of the substituted deuterium. For CH₂DOH this value is 3, for CH₃OD it is 1.

^(b)

Ratios do not include statistical correction factors.

^(c)

Belloche et al. (2016).

^(d)

Neill et al. (2013).

^(e)

Peng et al. (2012).

^(f)

Mean ratio over central region.

^(g)

Bianchi et al. (2017).

^(h)

Jørgensen et al. (2017).

⁽ⁱ⁾

Includes vibration correction factor for CH₂DOH of 1.457 at 300 K (see Sect. 2.2 of Jørgensen et al. 2017).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.