Table 4
GMC in the 4th quadrant.
| Reg | l | b | δ | α | d | M gas | SFR | ΣSFR | τ depl | CFE | ϵ ⋆ |
| (deg) | (deg) | (pc) | (kpc) | (105M⊙) | (10-4M⊙ yr-1) | (10-2M⊙ yr-1 kpc-2) | (102 Myr ) | (%) | |||
|
|
|||||||||||
| R1 | 349.7 | 0.13 | 20.1 | 0.40 | 11.2 | 0.9 | 1.3 ± 0.3 | 9.7 ± 1.9 | 6.9 ± 1.6 | 0.28 | 1.5 |
| R2 | 348.7 | 0.15 | 68.6 | 0.32 | 11.0 | 11.4 | 9.9 ± 1.9 | 6.7 ± 1.3 | 11.5 ± 2 | 0.19 | 0.7 |
| R3 | 347.85 | –0.3 | 29.3 | 1.50 | 10.3 | 2.3 | 1.7 ± 0.3 | 6.2 ± 1.2 | 13.5 ± 2 | 0.15 | 0.9 |
| R4 | 347.5 | 0.1 | 41.9 | 0.56 | 10.7 | 2.6 | 6.3 ± 1.3 | 11.4 ± 2.4 | 4.1 ± 0.8 | 0.39 | 1.1 |
| R5 | 346.15 | 0.05 | 36.9 | 1.00 | 10.6 | 2.2 | 1.3 ± 0.3 | 3.1 ± 0.6 | 16.9 ± 5 | 0.15 | 1.0 |
|
|
|||||||||||
| W43 | 30.75 | –0.15 | 49.2 | 0.54 | 5.9 | 12.3 | 4.4 ± 1.0 | 5.8 ± 1.3 | 27.9 ± 7 | 0.08 | 1.5 |
| G29.96–0.02 | 29.85 | –0.15 | 31.0 | 1.40 | 6.0 | 1.3 | 1.8 ± 0.4 | 6.1 ± 1.2 | 7.2 ± 2 | 0.24 | 2.8 |
Notes. The first column reports the identifier of the regions, the second and third columns the Galactic coordinates of the approximate centers. All the regions have been approximated as ellipses, where the circularized radius (δ) is reported in Col. 4 and the aspect ratio α (the ratio between the two semi-axis), is shown in Col. 5. Column 6 reports the distance, while Col. 7 is the 12CO(1–0) mass inside the larger contour, estimated as described in Sect. 2.6 while the evolutionary properties are reported in Cols. 8 to 12. Here we have reported the SFR of the entire cloud ΣSFR, an estimate of the depletion timescale τdepl, the CFE from Eq. (4) and ϵ⋆ from Eq. (2). For the regions in the first quadrant the 13CO(1–0) data from the GRS survey are employed. The depletion timescale τdepl has been computed as the time needed to convert the entire cloud mass into stars assuming a constant star-formation rate equal to the estimated SFR.
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