Astronomy & Astrophysics

**Table 3:** Methanol to amonia ratio in starbursts.
	M 82 ^a			NGC 253 ^b	Maffei 2
	Total	Halo ^c	Core ^c
N[CH₃OH]	34.9	29	5.9	83	33
N[NH₃] ^d	36	$\ll$ 36	$\la$ 36	440	140
$\rm [CH_3OH]/[NH_3]$	0.97	$\gg$ 0.81	$\ga$ 0.16	0.19	0.24

Column densities in units of $10^{13}~{\rm cm}^{-2}$ .
^a Data for the SW lobe.
^b Both lobes included.
^c Assuming most of the NH₃ arises from the high density component.
^d Data from Mauersberger et al. (2003); Weiß et al. (2001).

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