Table 2
Observed and calculated properties of extracted cores.
| ID | RA (J2000) | Dec (J2000) | Min. (″) | Maj. (″) | PA (°) | Aspect ratio | N(H2) (1022 cm−2) | Radius (″) | Radius (pc) | Masslow (M⊙) | Massup (M⊙) | αvir | MM assoc. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 18:14:29.5 | −17:32:14.9 | 2.3 | 5.0 | 10.3 | 2.2 | 2.22 | 3.0 | 0.07 | 0.5 | 5.4 | 1.47 | – |
| 2 | 18:14:24.0 | −17:31:37.7 | 2.6 | 9.9 | −32.6 | 3.8 | 2.90 | 4.5 | 0.09 | 1.9 | 14.4 | 0.54 | MM16 |
| 3 | 18:14:34.3 | −17:34:26.9 | 3.0 | 3.7 | 8.4 | 1.2 | 2.95 | 3.0 | 0.07 | 0.5 | 7.2 | 1.43 | – |
| 4 | 18:14:34.7 | −17:34:06.5 | 3.5 | 6.5 | −7.2 | 1.8 | 2.94 | 3.7 | 0.08 | 0.6 | 10.3 | 1.49 | – |
| 5 | 18:14:33.5 | −17:30:35.3 | 2.7 | 5.7 | −35.3 | 2.1 | 3.02 | 3.4 | 0.08 | 0.7 | 9.1 | 2.00 | – |
| 6 | 18:14:24.4 | −17:31:53.3 | 1.7 | 5.7 | −26.5 | 3.3 | 3.30 | 2.7 | 0.07 | 0.4 | 7.1 | 0.56 | MM17 |
| 7 | 18:14:25.2 | −17:32:02.9 | 2.9 | 8.8 | −26.8 | 3.0 | 3.37 | 4.4 | 0.09 | 1.2 | 15.8 | 0.54 | MM13 |
| 8 | 18:14:26.2 | −17:32:22.1 | 2.8 | 6.6 | −25.7 | 2.3 | 3.84 | 4.0 | 0.08 | 1.1 | 15.0 | 0.65 | MM15 |
| 9 | 18:14:35.6 | −17:30:24.5 | 1.9 | 2.8 | −85.3 | 1.5 | 3.80 | 1.5 | 0.05 | 0.2 | 4.1 | 4.15 | – |
| 10 | 18:14:35.6 | −17:30:54.5 | 3.7 | 6.8 | 5.3 | 1.8 | 4.22 | 4.6 | 0.10 | 2.6 | 21.8 | 0.61 | MM3 |
| 11 | 18:14:35.6 | −17:30:38.9 | 1.6 | 3.3 | 17.9 | 2.1 | 3.87 | 1.7 | 0.05 | 0.2 | 4.5 | 1.50 | – |
| 12 | 18:14:33.7 | −17:31:17.3 | 3.9 | 7.4 | 33.4 | 1.9 | 4.35 | 5.0 | 0.10 | 3.5 | 25.9 | 0.45 | MM5 |
| 13 | 18:14:34.6 | −17:30:46.1 | 4.7 | 6.9 | 28.1 | 1.5 | 4.64 | 5.3 | 0.11 | 4.2 | 30.8 | 0.64 | – |
| 14 | 18:14:33.0 | −17:31:17.3 | 1.2 | 4.9 | 34.5 | 4.1 | 4.20 | 1.7 | 0.05 | 0.1 | 4.9 | 0.84 | – |
| 15 | 18:14:33.3 | −17:34:06.5 | 2.4 | 7.8 | −5.5 | 3.2 | 4.43 | 3.9 | 0.08 | 0.9 | 16.9 | 0.87 | – |
| 16 | 18:14:33.1 | −17:34:19.7 | 2.2 | 4.4 | −18.6 | 2.0 | 4.35 | 2.6 | 0.07 | 0.3 | 8.9 | 0.88 | MM7 |
| 17 | 18:14:31.2 | −17:33:07.7 | 2.7 | 11.9 | 0.7 | 4.4 | 4.59 | 5.2 | 0.11 | 2.2 | 29.6 | 0.43 | – |
| 18 | 18:14:27.1 | −17:32:40.1 | 2.7 | 7.8 | −32.9 | 2.9 | 4.86 | 4.2 | 0.09 | 2.3 | 20.9 | 0.47 | MM11 |
| 19 | 18:14:32.6 | −17:31:35.3 | 3.0 | 11.7 | 1.3 | 3.9 | 5.05 | 5.5 | 0.11 | 3.5 | 36.0 | 0.25 | MM9 |
| 20 | 18:14:32.3 | −17:32:01.7 | 1.1 | 6.5 | 21.2 | 5.9 | 4.73 | 1.8 | 0.06 | 0.1 | 6.0 | 0.73 | – |
| 21 | 18:14:29.5 | −17:32:49.7 | 1.7 | 6.3 | −4.4 | 3.8 | 4.83 | 2.4 | 0.06 | 0.3 | 9.0 | 0.92 | – |
| 22 | 18:14:31.8 | −17:34:05.3 | 3.7 | 6.8 | −38.4 | 1.8 | 5.68 | 4.6 | 0.10 | 2.0 | 29.4 | 0.83 | – |
| 23 | 18:14:27.7 | −17:32:55.7 | 1.6 | 2.3 | −7.1 | 1.5 | 5.44 | 1.0 | 0.05 | 0.1 | 4.2 | 1.05 | – |
| 24 | 18:14:32.0 | −17:32:28.1 | 2.2 | 4.7 | 10.9 | 2.2 | 5.87 | 2.7 | 0.07 | 1.0 | 12.6 | 0.75 | MM10 |
| 25 | 18:14:32.1 | −17:32:18.5 | 1.5 | 4.5 | 13.2 | 2.9 | 5.71 | 2.0 | 0.06 | 0.5 | 8.4 | 0.94 | – |
| 26 | 18:14:30.4 | −17:33:56.9 | 4.6 | 8.6 | −41.9 | 1.9 | 6.48 | 5.4 | 0.11 | 3.5 | 44.3 | 0.85 | MM4 |
| 27 | 18:14:28.4 | −17:33:29.3 | 8.1 | 12.6 | −7.4 | 1.6 | 9.11 | 9.9 | 0.18 | 36.7 | 195.7 | 0.28 | MM2 |
| 28 | 18:14:29.8 | −17:33:26.9 | 6.4 | 11.4 | −37.6 | 1.8 | 8.20 | 8.1 | 0.15 | 11.6 | 119.2 | 0.30 | – |
Notes. Column 1: core ID number; Cols. 2 and 3: right ascension and declination of the core peak emission; Cols. 4 and 5: core major and minor axes; Col. 6; position angle; Col. 7: major-to-minor axes ratio; Col. 8: mean value of H2 column density within core boundary; Col. 9: deconvolved core radius in arcseconds; Col. 10: deconvolved core radius in parsec; Col. 11: lower limit on the mass; Col. 12: upper limit on mass; Col. 13: Virial ratio, calculated using Eq. (7) where the upper limit on the mass was used; Col. 14: Core associations to the MM identifications of previous work (Peretto et al. 2014). The detected proto-stellar sources are MM4, MM5 and MM7. Systematic error from the kinematical distance to SDC13 (3.6 ± 0.4 kpc) is associated to all size parameters. Uncertainty on the column density and masses originate from the assumption of constant [NH3]∕[H2] ~ 3 × 10−8 abundance (Harju et al. 1993) and temperature (12.7 K) in the cloud.
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