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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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