Table 5: Line ratios of integrated intensities in K km s^-1. The $1\sigma$ errors are $\sim$ $21\%$ . The CO 3-2/1-0 ratio was added to allow an easier comparison with the literature. To compare all data at a common resolution of 80'', we scaled the [C I] and ¹³CO data, for which maps are not available, using the beam filling factors $\Phi _{\rm B}^{80/10}$ and $\Phi _{\rm B}^{80/21}$ . The factor $\Phi _{\rm B}^{80/10}$ for [C I] and ¹³CO 2-1 data was derived from the ratio of ¹²CO 2-1 integrated intensities at 80'' and at 10'' resolution. Likeweise, the factor $\Phi _{\rm B}^{80/21}$ for ¹³CO 1-0 data was derived from CO 1-0.
$\Delta\alpha,\Delta\delta$ $\Phi _{\rm B}^{80/10}$ $\Phi _{\rm B}^{80/21}$ CO 3-2 CO 3-2 CO 2-1 CO 1-0 CO 2-1 [C I] 1-0 [C I] 1-0

['', ''] CO 1-0 CO 2-1 CO 1-0 ¹³CO 1-0 ¹³CO 2-1 ¹³CO 2-1 CO 3-2

M 83:

(0, 0) 0.22 0.28 0.6 0.64 0.93 9.34 10.02 3.73 0.58

(-80, -72) 0.37 0.45 0.46 0.46 0.99 8.77 9.58 1.48 0.34

(89, 38) 0.48 0.47 0.46 0.49 0.93 8.46 10.14 1.38 0.28

M 51:

(0, 0) 0.56 0.68 0.55 0.76 0.73 8.31 4.62 1.4 0.4

(72, 84) 0.62 0.73 0.6 0.76 0.8 9.27 13.81 3.19 0.3

(-84, -84) 0.52 0.72 0.43 0.75 0.57 6.04 6.09 1.25 0.27

**Table 5:** Line ratios of integrated intensities in K km s^-1. The $1\sigma$ errors are $\sim$ $21\%$ . The CO 3-2/1-0 ratio was added to allow an easier comparison with the literature. To compare all data at a common resolution of 80'', we scaled the [C I] and ¹³CO data, for which maps are not available, using the beam filling factors $\Phi _{\rm B}^{80/10}$ and $\Phi _{\rm B}^{80/21}$ . The factor $\Phi _{\rm B}^{80/10}$ for [C I] and ¹³CO 2-1 data was derived from the ratio of ¹²CO 2-1 integrated intensities at 80'' and at 10'' resolution. Likeweise, the factor $\Phi _{\rm B}^{80/21}$ for ¹³CO 1-0 data was derived from CO 1-0.
$\Delta\alpha,\Delta\delta$	$\Phi _{\rm B}^{80/10}$	$\Phi _{\rm B}^{80/21}$	CO 3-2	CO 3-2	CO 2-1	CO 1-0	CO 2-1	[C I] 1-0	[C I] 1-0
['', '']			CO 1-0	CO 2-1	CO 1-0	¹³CO 1-0	¹³CO 2-1	¹³CO 2-1	CO 3-2
M 83:
(0, 0)	0.22	0.28	0.6	0.64	0.93	9.34	10.02	3.73	0.58
(-80, -72)	0.37	0.45	0.46	0.46	0.99	8.77	9.58	1.48	0.34
(89, 38)	0.48	0.47	0.46	0.49	0.93	8.46	10.14	1.38	0.28
M 51:
(0, 0)	0.56	0.68	0.55	0.76	0.73	8.31	4.62	1.4	0.4
(72, 84)	0.62	0.73	0.6	0.76	0.8	9.27	13.81	3.19	0.3
(-84, -84)	0.52	0.72	0.43	0.75	0.57	6.04	6.09	1.25	0.27

Source LaTeX | All tables | In the text

	1 Introduction
	2 Data sets
	3 Spectra and line ratios
	4 Physical conditions
	5 Summary
	References
	Online Material