Table 2: Column densities for methanol isotopomers towards IRAS4A, derived by fixing the rotational temperature to the one derived for CH₂DOH, and ratios between isotopomers.
Source $T_{\rm rot}$ CH₂DOH $\chi^2_{\rm red}$ CH₃OD CHD₂OH CH₃OD CHD₂OH

size (K) ( $\times$ 10¹⁴ cm^-2) ( $\times$ 10¹³ cm^-2) ( $\times$ 10¹³ cm^-2) CH₂DOH CH₂DOH

10'' 27.1 $\pm$ 1.3 4.3 $\pm$ 0.4 13.5 3.1 $\pm$ 0.7 11 $\pm$ 1.7 (7.2 $\pm$ 1.8) $\times$ 10^-2 0.26 $\pm$ 0.05

15'' 31.3 $\pm$ 1.7 2.4 $\pm$ 0.3 8.5 1.6 $\pm$ 0.4 6.3 $\pm$ 1.0 (6.7 $\pm$ 1.9) $\times$ 10^-2 0.26 $\pm$ 0.05

20'' 36.2 $\pm$ 2.3 1.8 $\pm$ 0.2 5.2 1.2 $\pm$ 0.3 5.0 $\pm$ 0.9 (6.7 $\pm$ 1.8) $\times$ 10^-2 0.28 $\pm$ 0.06

25'' 42.2 $\pm$ 3.2 1.7 $\pm$ 0.2 3.2 1.4 $\pm$ 0.3 4.4 $\pm$ 0.8 (8.2 $\pm$ 2.0) $\times$ 10^-2 0.26 $\pm$ 0.06

30'' 46.2 $\pm$ 3.8 1.7 $\pm$ 0.2 2.9 1.5 $\pm$ 0.4 3.9 $\pm$ 0.7 (8.8 $\pm$ 2.6) $\times$ 10^-2 0.23 $\pm$ 0.05

**Table 2:** Column densities for methanol isotopomers towards IRAS4A, derived by fixing the rotational temperature to the one derived for CH₂DOH, and ratios between isotopomers.
Source	$T_{\rm rot}$	CH₂DOH	$\chi^2_{\rm red}$	CH₃OD	CHD₂OH	CH₃OD	CHD₂OH
size	(K)	( $\times$ 10¹⁴ cm^-2)		( $\times$ 10¹³ cm^-2)	( $\times$ 10¹³ cm^-2)	CH₂DOH	CH₂DOH
10''	27.1 $\pm$ 1.3	4.3 $\pm$ 0.4	13.5	3.1 $\pm$ 0.7	11 $\pm$ 1.7	(7.2 $\pm$ 1.8) $\times$ 10^-2	0.26 $\pm$ 0.05
15''	31.3 $\pm$ 1.7	2.4 $\pm$ 0.3	8.5	1.6 $\pm$ 0.4	6.3 $\pm$ 1.0	(6.7 $\pm$ 1.9) $\times$ 10^-2	0.26 $\pm$ 0.05
20''	36.2 $\pm$ 2.3	1.8 $\pm$ 0.2	5.2	1.2 $\pm$ 0.3	5.0 $\pm$ 0.9	(6.7 $\pm$ 1.8) $\times$ 10^-2	0.28 $\pm$ 0.06
25''	42.2 $\pm$ 3.2	1.7 $\pm$ 0.2	3.2	1.4 $\pm$ 0.3	4.4 $\pm$ 0.8	(8.2 $\pm$ 2.0) $\times$ 10^-2	0.26 $\pm$ 0.06
30''	46.2 $\pm$ 3.8	1.7 $\pm$ 0.2	2.9	1.5 $\pm$ 0.4	3.9 $\pm$ 0.7	(8.8 $\pm$ 2.6) $\times$ 10^-2	0.23 $\pm$ 0.05

Source LaTeX | All tables | In the text