Table 2.
Physical properties of the ten most CO luminous clouds measured by CPROPS, sorted by decreasing luminous mass.
| Molecular gas | H II region ( † ) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud | RA | Dec | Mlum | Mvir | Rad. | Δv | αvir | Σmol | R21 | Dcorot | LHα |
| ID | h:m:s |
 |
105 M⊙ | 105 M⊙ | pc | km s−1 | – | M⊙ pc−2 | – | kpc | erg s−1 |
| L1 ( ⋆ ) | 01:36:45.328 | 15:47:48.48 | 204 | 91 | 184 | 16.3 | 0.5 | 192 | 0.70 | 0.00 | 6.3 × 1039 |
| L2 | 01:36:41.757 | 15:47:22.17 | 149 | 92 | 280 | 13.2 | 0.7 | 61 | 0.61 | 1.71 | 5.5 × 1036 |
| L3 | 01:36:47.144 | 15:46:08.77 | 142 | 73 | 193 | 14.2 | 0.6 | 121 | 0.71 | 0.37 | 7.1 × 1038 |
| L4 | 01:36:38.574 | 15:48:46.11 | 139 | 68 | 141 | 16.0 | 0.5 | 223 | –( † †) | 0.00 | 8.2 × 1038 |
| L5 | 01:36:42.337 | 15:46:50.22 | 127 | 131 | 246 | 16.9 | 1.2 | 66 | 0.60 | 2.18 | 2.6 × 1037 |
| L6 | 01:36:42.974 | 15:47:23.85 | 118 | 83 | 302 | 12.1 | 0.8 | 41 | 0.60 | 1.35 | 8.6 × 1036 |
| L7 | 01:36:44.038 | 15:46:35.88 | 118 | 172 | 355 | 16.1 | 1.6 | 30 | 0.56 | 0.87 | 4.2 × 1036 |
| L8 | 01:36:36.942 | 15:46:31.21 | 105 | 63 | 145 | 15.2 | 0.7 | 159 | 0.61 | 0.00 | 6.6 × 1037 |
| L9 | 01:36:43.859 | 15:48:01.02 | 88 | 52 | 204 | 11.6 | 0.7 | 67 | 0.57 | 0.00 | 1.3 × 1037 |
| L10 | 01:36:41.309 | 15:46:59.40 | 86 | 89 | 212 | 15.0 | 1.2 | 61 | 0.63 | 2.50 | 7.7 × 1036 |
| NGC 628 Mean | – | – | 14 | 22 | 91 | 10.3 | 2.1 | 56 | 0.54 | – | – |
Notes. The last line lists the parameters averaged in all molecular clouds in NGC 628. From Cols. 1 to 11: cloud identification, cloud coordinates in RA and Dec, luminous CO mass, virial mass, radius, velocity linewidth, virial parameter, molecular gas mass surface density, CO(2–1)/CO(1–0), and measured distance to the closest corotation region. Column 12 lists the Hα luminosity of the associated H II region estimated from MUSE observations from Kreckel et al. (2017). ( ⋆ )Cloud 1 corresponds to the NGC 628 headlight. ( † )Often there are multiple objects within a 150 pc region. We list the closest H II region. ( † †)Cloud L4 falls just outside the coverage of the CO(1−0) observations.
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