Molecular gas and star formation in central rings across nearby galaxies

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Table 2.

Central ring properties.

Galaxy	r_ring	$L_{CO}^{ring}$ $Mathematical equation: $ L_{\mathrm{CO}}^{\mathrm{ring}} $$	$M_{mol}^{ring}$ $Mathematical equation: $ M_{\mathrm{mol}}^{\mathrm{ring}} $$	$M_{mol}^{ring} / M_{mol}^{gal}$ $Mathematical equation: $ {M_{\mathrm{mol}}^{\mathrm{ring}}}/{M_{\mathrm{mol}}^{\mathrm{gal}}} $$	SFR_ring	SFR_ring/SFR_gal
	[pc]	[K km/s pc²]	[10⁶ M_⊙]	[%]	[M_⊙/yr]	[%]
(1)	(2)	(3)	(4)	(5)	(6)	(7)
NGC 1097	970 ± 230	300 ± 50	550 ± 180	10.0 ± 3.3	1.9 ± 0.6	40 ± 17
NGC 1300	400 ± 110	77 ± 16	140 ± 50	5.5 ± 1.9	0.102 ± 0.032	8.7 ± 3.5
NGC 1365	830 ± 210	1500 ± 340	1900 ± 450	10.5 ± 2.5	6.3 ± 1.4	37 ± 13
NGC 1433	1070 ± 150	94 ± 32	170 ± 60	8.5 ± 3.2	0.038 ± 0.026	3.3 ± 2.4
NGC 1512	710 ± 150	80 ± 10	137 ± 31	10.3 ± 2.4	0.24 ± 0.06	19 ± 7
NGC 1566	840 ± 190	71 ± 7	100 ± 24	2.0 ± 0.5	0.052 ± 0.016	1.1 ± 0.5
NGC 1672	630 ± 170	151 ± 33	540 ± 190	7.4 ± 2.7	2.9 ± 1.1	38 ± 17
NGC 2566	300 ± 80	220 ± 90	400 ± 200	5.6 ± 2.7	−	−
NGC 2903	260 ± 90	270 ± 70	120 ± 50	3.3 ± 1.5	0.64 ± 0.29	21 ± 11
NGC 2997	410 ± 120	160 ± 40	140 ± 60	2.0 ± 0.9	−	−
NGC 3351	370 ± 70	116 ± 21	89 ± 17	7.2 ± 1.4	0.31 ± 0.05	24 ± 7
NGC 3489	152 ± 33	5.0 ± 1.9	3.2 ± 1.5	7 ± 3	0.014 ± 0.008	61 ± 38
NGC 4303	290 ± 100	56 ± 22	120 ± 60	1.5 ± 0.8	0.24 ± 0.10	4.4 ± 2.1
NGC 4321	560 ± 120	160 ± 50	270 ± 90	3.5 ± 1.1	0.51 ± 0.13	14 ± 5
NGC 4459	120 ± 50	23 ± 4	13 ± 4	5.0 ± 1.5	−	−
NGC 4476	460 ± 120	34 ± 4	43 ± 12	60 ± 18	−	−
NGC 4477	120 ± 40	15 ± 4	9.8 ± 3.6	25 ± 10	−	−
NGC 5236	230 ± 40	430 ± 100	101 ± 24	3.5 ± 0.9	−	−
NGC 5248	550 ± 120	130 ± 36	130 ± 40	2.9 ± 1.0	0.31 ± 0.13	14 ± 7
NGC 7743	130 ± 50	39 ± 8	36 ± 12	10.1 ± 3.4	0.062 ± 0.026	29 ± 14
MW CMZ⁴	150 ± 50	−	30 $_{- 10}^{+ 20}$ $Mathematical equation: $ ^{+20}_{-10} $$	4.6 $_{- 1.5}^{+ 3.1}$ $Mathematical equation: $ ^{+3.1}_{-1.5} $$	0.07 $_{- 0.02}^{+ 0.08}$ $Mathematical equation: $ ^{+0.08}_{-0.02} $$	3.7 $_{- 1.3}^{+ 4}$ $Mathematical equation: $ ^{+4}_{-1.3} $$

Notes. Col. 2: Central ring radius and its errors. Col. 3: Central ring CO(2–1) Luminosity and its error. Col. 4: Central ring molecular gas mass and its error. Col. 5: Central ring molecular gas fraction and its error. Col. 6: Central ring SFR and its error. Col. 7: Central ring SFR fraction and its error. Col. 8. “–” means that the central ring SFR (and therefore, also its SFR fraction) could not be determined due to the fact that Σ_SFR maps were only available for 14 of the 20 galaxies. Literature values for the MW CMZ are taken from Henshaw et al. (2023), Mills (2017).

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