The GUAPOS project: G31.41+0.31 Unbiased ALMA sPectral Observational Survey - I. Isomers of C2H4O2

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Table 5

Parameter of the best fit and abundances for MF, AA, and GA.

	FWHM	V_LRS	T_ex	N_tot	X
	[km s⁻¹]	[km s⁻¹]	[K]	[10¹⁷ cm⁻²]
CH₃OCHO	6.8	1.1	221 ± 27	20 ± 4	(2.0 ± 0.6) × 10⁻⁷
CH₃COOH	7.8	0.0	299 ± 42	8.4 ± 1.4	(8 ± 3) × 10⁻⁸
CH₂OHCHO	8.8	0.0	128 ± 17	0.50 ± 0.09	(5.0 ± 1.4) × 10⁻⁹

Notes. N_tot : column density inside 1′′.2 beam; X: abundances inside a beam calculated as N_tot∕N_H2, where . FWHM and V_LRS parameters were kept fixed in the fitting procedure.

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