Table 4
Physical parameters of the MDCs found in NGC 6357.
| MDC | MDC (a) | FWHMDec | ⟨Tdust⟩ | Mass | Lbol |  |
Lsub-mm/Lbol | Comments (b) |
|---|---|---|---|---|---|---|---|---|
| Id. | nb. | (pc) | (K) | (M⊙) | (L⊙) | (× 106 cm−3) | (%) | |
| IR-quiet protostellar MDC | ||||||||
| HOBYS_J172631.1-340236 | 6 | 0.12 | 13.1 ± 0.3 | 155.0 ± 20.3 | 76 | 2.64 ± 0.34 | 10.7 | 70 μm compact source |
| Starless MDC candidate | ||||||||
| HOBYS_ J172516.5-342446 | 1 | 0.21 | 17.0 ± 0.6 | 385.8 ± 50.7 | 905 | 1.19 ± 0.15 | 4.3 | |
| HOBYS_J172535.8-342051 | 5 | 0.25 | 23.2 ± 1.3 | 160.5 ± 29.2 | 2420 | 0.28 ± 0.05 | 1.3 | |
| HOBYS_J172601.1-342955 | 7 | 0.26 | 20.3 ± 2.3 | 137.2 ± 37.2 | 919 | 0.22 ± 0.05 | 2.2 | |
| HOBYS_J172412.3-341307 | 10 | 0.13 | 15.3 ± 0.7 | 111.6 ± 22.0 | 139 | 1.45 ± 0.28 | 6.3 | |
| HOBYS_J172446.2-341048 | 11 | 0.08 | 23.3 ± 1.5 | 103.2 ± 21.1 | 1568 | 6.19 ± 1.27 | 1.2 | |
| HOBYS_J172538.8-343058 | 12 | 0.10 | 14.9 ± 1.0 | 102.4 ± 28.0 | 107 | 3.05 ± 0.83 | 6.9 | |
| HOBYS_J172357.2-340545 | 14 | 0.25 | 15.6 ± 0.5 | 97.5 ± 14.7 | 168 | 0.17 ± 0.02 | 4.4 | No Hi-GAL cov. |
| HOBYS_J172451.0-341018 | 17 | 0.08 | 25.3 ± 2.2 | 83.1 ± 19.5 | 2065 | 4.98 ± 1.17 | 0.9 | |
| HOBYS_J172350.5-340813 | 18 | 0.12 | 15.9 ± 0.6 | 82.2 ± 13.8 | 125 | 1.29 ± 0.21 | 5.6 | No Hi-GAL cov. |
| HOBYS_J172623.1-343223 | 21 | 0.15 | 16.7 ± 2.1 | 80.6 ± 28.7 | 167 | 0.60 ± 0.21 | 4.6 | |
| HOBYS_J172548.0-342852 | 22 | 0.08 | 16.2 ± 2.4 | 79.0 ± 40.3 | 138 | 3.77 ± 1.92 | 5.1 | |
| HOBYS_J172459.2-341427 | 23 | 0.13 | 18.7 ± 1.0 | 75.4 ± 14.5 | 431 (c) | 0.85 ± 0.16 | 2.2 | |
| Undefined cloud structure | ||||||||
| HOBYS_ J172519.7-342427 | 2 | 0.13 | 21.2 ± 2.4 | 237.1 ± 62.5 | 2076 | 2.84 ± 0.75 | 1.8 | |
| HOBYS_J172422.4-341218 | 3 | 0.29 | 15.7 ± 1.7 | 182.1 ± 58.0 | 265 | 0.20 ± 0.06 | 1.0 | Over two Hi-GAL |
| HOBYS_J172410.3-340216 | 4 | 0.20 | 12.9 ± 1.3 | 163.1 ± 56.9 | 72 | 0.58 ± 0.20 | 11.4 | |
| HOBYS_J172439.6-340924 | 8 | 0.12 | 20.1 ± 1.2 | 134.2 ± 27.5 | 847 | 2.14 ± 0.44 | 2.3 | Over two Hi-GAL |
| HOBYS_J172646.5-343102 | 9 | 0.30 | 16.3 ± 1.5 | 111.9 ± 29.2 | 201 | 0.11 ± 0.03 | 2.2 | |
| HOBYS_J172350.7-340726 | 13 | 0.25 | 15.7 ± 1.7 | 98.9 ± 33.3 | 145 | 0.16 ± 0.05 | 5.6 | No Hi-GAL cov. |
| HOBYS_J172444.3-341031 | 15 | 0.08 | 24.9 ± 1.7 | 93.0 ± 18.7 | 2122 | 4.84 ± 0.97 | 0.6 | |
| HOBYS_J172539.3-342839 | 16 | 0.09 | 18.2 ± 0.9 | 89.8 ± 15.5 | 308 | 3.46 ± 0.59 | 3.4 | |
| HOBYS_J172635.6-340230 | 19 | 0.12 | 12.1 ± 0.6 | 81.1 ± 17 | 24 | 1.32 ± 0.28 | 13.9 | |
| HOBYS_J172515.1-340940 | 20 | 0.20 | 21.5 ± 3.1 | 80.8 ± 27.6 | 769 | 0.26 ± 0.08 | 1.7 | |
Notes. (a) The MDC’s numbering is done by decreasing mass. (b)All MDCs are associated with a Hi-GAL source (Molinari et al. 2016) except when it is indicated as “No Hi-GAL cov”. (not covered by the Hi-GAL survey) or “Over two Hi-GAL” (meaning that the MDC is straddling two Hi-GAL sources). (c) For MDC #23, the lack of mid-IR and 70 μm fluxes make a large and unreliable over-estimation of Lbol. Then the quoted Lbol is assigned to be LData but calculated using the expected 70 μm flux evaluated from the fitted curve.
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