Table 2.

Excitation temperatures, column densities, and measured and modelled abundances of COMs in L1544

Species	(0”,0”)				CH3OH peak
	Tex (K)	Nobs (cm−2)	χobsc	χmodd	Tex (K)	Nobs (cm−2)	χobsc	χmodd
CH3O	5-10b	≤(2.8-3.6)×1011	≤(5.1-6.7)×10−12	7.7×10−11	8.0e	4.0×1011	2.7×10−11	1.3×10−10
CH3OCHO	5.1±2.3a	(4.4±4.0)×1012a	(8.1±7.4)×10−11	8.0×10−11	7.9±3.6	(2.3±1.4)×1012	(1.5±0.9)×10−10	1.2×10−10
CH3OCH3	5.7±3.1	(1.5±0.2)×1012	(2.8±0.4)×10−11	8.0×10−11	7.6±3.7	(7.7±1.6)×1011	(5.1±1.1)×10−11	1.0×10−10
CH3CHO	5.0e	1.2×1012	2.2×10−11	4.0×10−11	7.8e	3.2×1012	2.1×10−10	8.0×10−11
CH3NC	22.9e	2.7×1010	5.0×10−13	…	5-10b	≤(0.7-1.6)×1010	≤(0.5-1.1)×10−12	…
c-C3H2Of	5-10b	(1.0-3.5)×1011	(1.9-6.5)×10−12	…	8.0e	7.0×1010	4.7×10−12	…
CH2CHCN	5.8±0.9	(1.2±0.8)×1012	(2.2±1.5)×10−11	…	5.0±1.4	(5.8±4.7)×1011	(3.9±3.1)×10−11	…
HCCNC	5-10b	(0.3-3.0)×1012	(0.6-5.6)×10−11	…	5-10b	(1.0-9.1)×1011	(0.7-6.1)×10−11	…
HCCCHO	5-10b	(1.8-6.3)×1011	(0.3-1.2)×10−11	…	5-10b	(1.6-5.8)×1011	(1.1-3.9)×10−11	…
NH2CHO	5-10b	≤(1.3-1.7)×1010	≤(2.4-3.1)×10−13	5.0×10−11	5-10b	≤(1.0-1.3)×1010	≤(6.7-8.7)×10−13	7.0×10−11
CH3NCO	5-10b	≤(0.8-6.3)×1011	≤(0.2-1.2)×10−11	…	5-10b	≤(0.9-6.3)×1011	≤(0.6-4.2)×10−11	…
Glycine	5-10b	≤(3.3-5.8)×1012	≤(0.6-1.1)×10−10	…	5-10b	≤(4.2-9.5)×1012	≤(2.8-6.3)×10−10	…

^aErrors correspond to 1σ uncertainties in MADCUBAIJ.

^bT_ex range assumed to calculate the total column densities from a single COM transition using MADCUBAIJ.

^cMolecular abundances calculated by using an H₂ column density of 5.4×10²² cm⁻² for the continuum peak (see Section 5 for details) and of 1.5×10²² cm⁻² for the position of the CH₃OH peak (Spezzano et al. 2016)

^dAbundances predicted by the model of Vasyunin et al. (in prep).

^eFitting solutions could only be obtained by fixing T_ex within MADCUBAIJ.

^fT_ex and N_obs calculated using Weeds.