Singly and doubly deuterated formaldehyde in massive star-forming regions

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Volume 653 (September 2021)

A&A, 653 (2021) A45

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Table 3

Calculated column density ratios for the observed species.

Source	Stage	N(HDCO)	N(D₂CO)	N(D₂CO)	F
		N(H₂CO)	N(HDCO)	N(H₂CO)
G028-C1	HMSC	<0.297	<1.223	<0.364	–
G034-F2	HMSC	<0.513	<0.794	<0.408	–
G034-F2	HMSC	<0.520	<0.794	<0.413	–
G034-G2	HMSC	<0.339	<0.794	<0.269	–
G034-G2	HMSC	<0.688	<0.794	<0.546	–
AFGL5142	HMSC/HMPO	0.162 ± 0.035^*	0.153 ± 0.035	0.025 ± 0.003^*	1.05 ± 0.34
AFGL5142	HMSC/HMPO	0.105 ± 0.017^*	0.268 ± 0.051	0.028 ± 0.004^*	0.39 ± 0.11
IRAS05358+3543	HMSC/HMPO	0.122 ± 0.018^*	0.180 ± 0.031	0.022 ± 0.003^*	0.68 ± 0.17
18089-1732	HMPO	0.018 ± 0.004^*	<0.055	<0.001^*	>0.32
18089-1732	HMPO	0.030 ± 0.013^*	<0.066	<0.002^*	>0.45
18517+0437	HMPO	0.304 ± 0.144^*	0.097 ± 0.031	0.029 ± 0.016^*	3.19 ± 2.77
18517+0437	HMPO	0.001 ± 0.001^*	5.397 ± 2.540	0.005 ± 0.003^*	0.0002 ± 0.0003
G75-core	HMPO	0.053 ± 0.013^*	<0.103	<0.005^*	>0.56
G5.89-0.39	UC H II	0.004 ± 0.001^*	<0.080	<0.001^*	>0.02
G5.89-0.39	UC H II	0.008 ± 0.001^*	<0.0282	<0.001^*	>0.06
I19035-VLA1	UC H II	<0.021^*	<0.759	<0.016^*	–
19410+2336	UC H II	0.021 ± 0.006^*	0.206 ± 0.072	0.004 ± 0.001^*	0.11 ± 0.05

Notes. We note that asterisks next to the numbers indicate the values calculated based on the H CO line, assuming a ¹²C/¹³C ratio according to Milam et al. (2005). Each velocity component is shown as a separate row.

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