Formation of COMs through CO hydrogenation on interstellar grains

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Table 7

Summary of observational data of various dark interstellar environments.

Source	H₂ CO	GA	EG	MF	Ref
Comet
67p	0.9636	−	<0.0045	0.0418	1
Hale-Bopp	0.4583	<0.0166	0.1042	0.0333	2, 3
Lemmon	0.4375	<0.05	0.15	<0.1	4
Lovejoy	0.2692	<0.0269	0.1346	<0.0769	4

Low-mass star-forming region (hot corino)
IRAS 16293-2422	0.0821	0.0027	0.01	0.02	5, 6, 7
NGC 1333-IRAS 2A	0.5880	0.0065	0.0023	0.019	5, 8, 9
NGC 1333-IRAS 4A	0.2990	0.0141	0.0025	0.015	5, 9

High-mass star-forming region (hot core)
G31.41+0.31	−	0.1333	1.333	4.5333	10, 11

Dark prestellar core
Barnard 1b	−	<0.011	−	0.012	12

Galactic center quiescent cloud
G−0.02	0.053	0.010	0.012	0.034	13
G−0.11	0.059	0.015	0.020	0.071	13
G+0.693	0.020	0.020	0.024	0.10	13

Notes. Key species are shown with respect to methanol where available.

References. ⁽¹⁾ Le Roy et al. (2015); ⁽²⁾ Bockelée-Morvan et al. (2000); ⁽³⁾Crovisier et al. (2004); ⁽⁴⁾Biver et al. (2014); ⁽⁵⁾Bottinelli et al. (2007); ⁽⁶⁾Jørgensen et al. (2016); ⁽⁷⁾Rivilla et al. (2018); ⁽⁸⁾Coutens et al. (2015); ⁽⁹⁾Taquet et al. (2015); ⁽¹⁰⁾Beltrán et al. (2008); ⁽¹¹⁾Rivilla et al. (2017); ⁽¹²⁾Öberg et al. (2010); ⁽¹³⁾Requena-Torres et al. (2008).

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