CHEMOUT: CHEMical complexity in star-forming regions of the OUTer Galaxy - V. Chemical composition gradients as a function of the galactocentric radius

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Volume 704 (December 2025)

A&A, 704 (2025) A171

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Table 4

Fractional abundance, X_mol, with respect to H₂ of HCN, HCO⁺, c-C₃H₂, H¹³CO⁺, HCO, SO, H₂CO, and CH₃OH.


Source	X(HCN)	X(HCO⁺)	X(c-C₃H₂)	X(H¹³CO⁺)	X(HCO)	X(SO)	X(H₂CO)	X(CH₃OH)
	×10⁻¹¹	×10⁻¹¹	×10⁻¹¹	×10⁻¹²	×10⁻¹¹	×10⁻¹⁰	×10⁻¹⁰	×10⁻¹⁰
19383+2711^a	6.7 (1.5)	3.1 (0.7)	1.8 (0.4)	0.9 (0.3)	3.1 (1.3)	0.36 (0.13)	0.49 (0.15)	≤0.6
19423+2541	7.0 (1.7)	2.1 (0.6)	1.2 (0.3)	0.7 (0.2)	1.4 (0.4)	0.8 (0.2)	2.2 (0.7)	1.6 (0.4)
19489+3030	6.7 (1.5)	4.9 (1.0)	2.5 (0.6)	4.6 (0.12)	≤1.0	0.5 (0.3)	...	...
19571+3113^a	7 (2)	4.7 (1.1)	4.0 (1.1)	≤0.9	7 (4)	≤0.4	...	...
20243+3853	8.3 (1.7)	4.0 (0.9)	2.4 (0.5)	1.3 (0.4)	4.3 (1.0)	0.7 (0.2)	...	...
WB89-002^b	...	...	...	...	...	...	...	...
WB89-006^a	3.1 (1.6)	2.3 (0.6)	1.8 (0.7)	2.6 (0.9)	≤1.6	≤0.5	0.44 (0.13)	2.2 (0.8)
WB89-014	4.3 (1.1)	3.6 (0.9)	2.5 (0.8)	≤1.3	≤3	≤0.8	...	...
WB89-031	3.2 (0.7)	1.7 (0.5)	2.0 (0.6)	0.8 (0.4)	3.2 (1.2)	≤0.4	...	...
WB89-035	9 (2)	4.8 (1.2)	3.8 (1.1)	2.2 (0.7)	3.5 (1.3)	2.0 (0.6)	3.7 (1.1)	3.2 (1.0)
WB89-040	17 (5)	2.4 (1.0)	10 (3)	10.2 (0.4)	23 (8)	5 (2)	...	...
WB89-060	...	...	0.8 (0.3)	2.9 (0.7)	≤0.4	2.2 (0.6)	...	...
WB89-076	3.2 (0.8)	0.9 (0.3)	1.8 (0.4)	2.0 (0.5)	0.6 (0.2)	1.6 (0.4)	0.63 (0.17)	1.6 (0.6)
WB89-080	4.9 (1.1)	...	1.9 (0.7)	1.6 (0.6)	1.4 (0.5)	1.5 (0.4)	2.3 (0.7)	2.7 (0.8)
WB89-083	7.4 (1.5)	6.8 (1.4)	3.6 (0.8)	2.3 (0.6)	5.2 (1.8)	≤0.7	...	...
WB89-152^b	...	...	...	...	...	...	...	...
WB89-283	7.0 (1.8)	2.7 (0.7)	2.0 (0.7)	0.8 (0.3)	7 (2)	0.8 (0.3)	3.2 (1.0)	3.1 (0.8)
WB89-288	1.5 (0.3)	2.1 (0.4)	1.0 (0.3)	≤0.5	3.4 (1.0)	≤0.3	...	...
WB89-315^b	...	...	...	...	...	...	...	...
WB89-379	3.3 (0.8)	0.5 (0.2)	0.49 (0.14)	0.7 (0.2)	1.3 (0.4)	0.3 (0.11)	0.9 (0.2)	1.2 (0.4)
WB89-380^a	2.6 (0.7)	1.4 (0.4)	0.8 (0.8)	0.6 (0.2)	≤1.3	0.29 (0.10)	0.26 (0.12)	0.54 (0.17)
WB89-391	3.6 (0.9)	1.7 (0.4)	1.9 (0.5)	0.63 (0.19)	2.4 (0.6)	0.9 (0.2)	0.7 (0.2)	1.5 (0.4)
WB89-399	2.7 (0.6)	1.8 (0.4)	1.5 (0.3)	≤0.2	2.2 (0.6)	≤0.13	0.6 (0.2)	0.15 (0.07)
WB89-437	11 (3)	4.2 (0.9)	1.2 (0.3)	1.6 (0.4)	1.0 (0.3)	1.7 (0.4)	2.6 (0.7)	5.4 (1.3)
WB89-440	2.7 (0.5)	4.3 (0.8)	1.7 (0.4)	≤0.4	5.9 (1.4)	≤0.2	...	...
WB89-501	5.2 (1.2)	2.3 (0.6)	1.3 (0.3)	0.7 (0.2)	2.6 (0.7)	0.53 (0.14)	1.8 (0.5)	1.6 (0.5)
WB89-529	0.84 (0.19)	1.7 (0.3)	0.7 (0.2)	≤0.4	2.3 (0.6)	≤0.2	...	...
WB89-572	1.8 (0.4)	0.9 (0.2)	0.34 (0.14)	0.4 (0.2)	≤0.7	0.6 (0.2)	...	...
WB89-621	6.9 (1.7)	2.0 (0.5)	0.49 (0.13)	1.4 (0.4)	0.8 (0.3)	2.9 (0.7)	2.1 (0.6)	5.6 (1.5)
WB89-640	2.2 (0.4)	0.34 (0.11)	0.80 (0.19)	1.4 (0.3)	2.6 (0.6)	0.35 (0.11)	...	...
WB89-670	1.0 (0.3)	0.8 (0.2)	1.3 (0.5)	1.6 (0.6)	≤0.6	≤0.18	...	...
WB89-705	1.5 (0.4)	0.9 (0.2)	1.9 (0.5)	2.9 (0.8)	1.0 (0.4)	0.67 (0.18)	...	...
WB89-789	1.3 (0.3)	0.87 (0.19)	0.35 (0.11)	0.8 (0.2)	0.7 (0.2)	0.21 (0.07)	0.5 (0.2)	0.37 (0.11)
WB89-793	4.8 (1.2)	2.1 (0.5)	1.4 (0.5)	2.5 (0.7)	≤1.1	1.2 (0.4)	...	...
WB89-898^b	...	...	...	...	...	...	...	...

Notes. ^(a)Sources characterized by a double clump. The fractional abundances have been estimated by summing the total column densities over both clumps. ^(b)Sources lacking NIKA2 observations, for which no H₂ column density could be estimated.

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