Observational tests of interstellar methanol formation

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Table 4

Temperatures and E/A ratios

Source	[K]	T_spin [K]	E/A

W51 e1/e2	29^b	16^b	0.88 ± 0.05
NGC 2264 IRS1	5	>37^c	1.24 ± 0.19
DR21 (OH)	10	>37^c	1.29 ± 0.10
NGC 7538 IRS9	7	>22^d	1.08 ± 0.12
S140 IRS1	12	>23^d	1.03 ± 0.07
NGC 7538 IRS1	8	>36^d	1.09 ± 0.10
AFGL 2591	9	10	0.71 ± 0.06

Notes.

^(a)

From methanol E-lines.

^(b)

Using ¹³CH₃OH.

^(c)

Lower limit set at E/A = 0.995.

^(d)

Lower limit corresponding to lower limit E/A value.

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