Molecular gas and star formation in central rings across nearby galaxies

Open Access

Table 3.

Central ring properties: medians and ranges.

Quantity	Unit	Median		Interquartile range		MW CMZ

		All	Spirals	All	Spirals
r_ring	pc	400	550	−150, +250	−210, +220	150 ± 50
${log}_{10} (M_{mol}^{ring})$ $Mathematical equation: $ \log_{10}( M_{\mathrm{mol}}^{\mathrm{ring}}) $$	M_⊙	8.1	8.14	−0.23, +0.17	−0.06, +0.4	7.5 ± 0.2
$M_{mol}^{ring} / M_{mol}^{gal}$ $Mathematical equation: $ M_{\mathrm{mol}}^{\mathrm{ring}}/M_{\mathrm{mol}}^{\mathrm{gal}} $$	%	5.6	5.5	−2.1, +4.5	−2.4, +2.5	4.6 $_{- 1.5}^{+ 3.1}$ $Mathematical equation: $ ^{+3.1}_{-1.5} $$
${log}_{10} (L_{CO (2 - 1)}^{ring})$ $Mathematical equation: $ \log_{10}( L_{\mathrm{CO(2-1)}}^{\mathrm{ring}}) $$	K km/s pc²	5.02	5.18	−0.31, +0.22	−0.24, +0.21	−
SFR_ring	M_⊙/yr	0.21	0.22	−0.16, +0.15	−0.07, +0.40	0.07 $_{- 0.02}^{+ 0.08}$ $Mathematical equation: $ ^{+0.08}_{-0.02} $$
SFR_ring/SFR_gal	%	13	10.2	−5, +10	−3.7, +8	3.7 $_{- 1.3}^{+ 4}$ $Mathematical equation: $ ^{+4}_{-1.3} $$
$t_{dep}^{ring}$ $Mathematical equation: $ t_{\mathrm{dep}}^{\mathrm{ring}} $$	Gyr	0.58	0.58	−0.14, +0.18	−0.11, +0.39	$0 . 5_{- 0.1}^{+ 1.0}$ $Mathematical equation: $ 0.5_{-0.1}^{+1.0} $$

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