Table 1
List of clusters and their structural parameters.
| Cluster | α | δ | R | σ bg | σ 0 | ⟨ n∗ ⟩ | r c | δ c | rc/R | Class |
| (h m s) | (o′) | (pc) | (pc-2) | (pc-2) | (pc-2) | (pc) | ||||
|
|
||||||||||
| Collinder 205 | 09 00 31(5) | –48 59 | 3.4 ± 1.2 | 9 ± 3 | 51 ± 16 | 4.8 ± 1.9 | 0.30 ± 0.03 | 6.6 ± 2.6 | 0.09 ± 0.03 | ?? |
| Hogg 10 | 11 10 40(9) | –60 24 | 1.9 ± 0.4 | 16 ± 2 | 9 ± 4 | 7.6 ± 1.7 | 0.46 ± 0.28 | 1.6 ± 0.3 | 0.24 ± 0.15 | H |
| Hogg 22 | 16 46 35(6) | –47 05 | 1.9 ± 0.5 | 20 ± 4 | 7 ± 3 | 9.0 ± 3.8 | 1.91 ± 1.10 | 1.3 ± 0.2 | 1.03 ± 0.65 | H |
| Lynga 14 | 16 55 03(5) | –45 14 | 1.1 ± 0.4 | 55 ± 18 | 153 ± 52 | 16.7 ± 7.0 | 0.22 ± 0.04 | 3.8 ± 1.3 | 0.20 ± 0.08 | CC |
| Markarian 38 ∗ | 18 15 15(5) | –19 01 | 1.6 ± 0.5 | 18 ± 6 | 44 ± 15 | 6.8 ± 2.3 | 0.13 ± 0.03 | 3.4 ± 1.2 | 0.08 ± 0.03 | CC |
| NGC 2302 | 06 51 55(4) | –07 05 | 2.3 ± 0.5 | 8 ± 2 | 16 ± 4 | 4.0 ± 1.4 | 0.54 ± 0.10 | 3.0 ± 0.6 | 0.23 ± 0.06 | CC |
| NGC 2362 a | 07 18 42(4) | –24 28 | 1.9 ± 0.4 | 13 ± 3 | 62 ± 14 | 3.3 ± 1.0 | 0.26 ± 0.05 | 5.8 ± 1.7 | 0.13 ± 0.04 | CC |
| NGC 2367 | 07 20 06(4) | –21 53 | 2.9 ± 0.7 | 5 ± 1 | 13 ± 3 | 2.3 ± 0.6 | 0.34 ± 0.11 | 3.6 ± 0.7 | 0.12 ± 0.05 | ?? |
| NGC 2645 | 08 39 05(6) | –46 14 | 2.1 ± 0.5 | 13 ± 3 | 48 ± 12 | 7.5 ± 2.1 | 0.22 ± 0.04 | 4.8 ± 1.2 | 0.10 ± 0.03 | ?? |
| NGC 2659 | 08 42 37(6) | –44 59 | 3.6 ± 0.5 | 9 ± 1 | 11 ± 2 | 5.2 ± 0.9 | 1.93 ± 0.37 | 2.2 ± 0.3 | 0.53 ± 0.12 | H |
| NGC 3572 | 11 10 26(8) | –60 15 | 2.5 ± 0.5 | 19 ± 3 | 76 ± 15 | 7.7 ± 1.9 | 0.16 ± 0.03 | 5.0 ± 1.1 | 0.06 ± 0.02 | H |
| NGC 3590 | 11 12 59(7) | –60 47 | 1.5 ± 0.4 | 30 ± 7 | 96 ± 27 | 11.7 ± 4.5 | 0.29 ± 0.06 | 4.2 ± 1.2 | 0.20 ± 0.07 | CC |
| NGC 5606 | 14 27 48(8) | –59 38 | 2.6 ± 0.4 | 11 ± 2 | 25 ± 5 | 4.8 ± 0.9 | 0.51 ± 0.13 | 3.2 ± 0.6 | 0.20 ± 0.06 | CC |
| NGC 6178 | 16 35 47(6) | –45 39 | 1.7 ± 0.4 | 24 ± 4 | 32 ± 11 | 12.2 ± 2.7 | 0.30 ± 0.12 | 2.3 ± 0.5 | 0.18 ± 0.08 | H |
| NGC 6604 b | 18 18 04(3) | –12 15 | 2.6 ± 0.7 | 11 ± 3 | 17 ± 5 | 4.4 ± 1.3 | 0.50 ± 0.11 | 2.6 ± 0.6 | 0.19 ± 0.07 | H |
| NGC 6613 | 18 19 58(4) | –17 06 | 2.9 ± 0.7 | 9 ± 2 | 82 ± 19 | 4.9 ± 1.2 | 0.12 ± 0.01 | 10.6 ± 3.5 | 0.04 ± 0.01 | CC |
| Ruprecht 79 | 09 40 59(7) | –53 51 | 3.9 ± 0.5 | 7 ± 1 | 4 ± 1 | 3.6 ± 0.5 | 2.2 ± 0.8 | 1.5 ± 0.2 | 0.57 ± 0.22 | CC |
| Stock 13 c | 11 13 04(8) | –58 53 | 2.3 ± 0.3 | 15 ± 2 | 42 ± 14 | 3.8 ± 0.9 | 0.11 ± 0.05 | 3.8 ± 1.0 | 0.05 ± 0.02 | H |
| Stock 16 | 13 19 30(8) | –62 38 | 2.8 ± 0.7 | 15 ± 3 | 8 ± 4 | 5.8 ± 1.6 | 1.2 ± 0.6 | 1.5 ± 0.3 | 0.42 ± 0.24 | H |
| Trumpler 18 | 11 11 27(9) | –60 40 | 4.6 ± 0.8 | 9 ± 1 | 15 ± 4 | 2.5 ± 0.4 | 0.38 ± 0.10 | 2.8 ± 0.5 | 0.08 ± 0.03 | H |
| Trumpler 28 | 17 37 02(5) | –32 38 | 1.4 ± 0.5 | 9 ± 4 | 25 ± 9 | 12.3 ± 4.5 | 0.84 ± 0.16 | 3.7 ± 1.4 | 0.61 ± 0.24 | H |
Notes. Column description: (1) identification; (2, 3) J2000 coordinates; (4) cluster radius; (5) background density; (6) core density; (7) observed average density; (8) core radius; (9) density-contrast parameter; (10) ratio of core-size to cluster-radius; (11) cluster type: hierarchical (H), centrally concentrated (CC), undefined (??). Notes: ∗Markarian 38 = C 1812-190. Parameters from Piskunov et al. (2007): (a) Rc = 0.6 ± 0.4 pc; (b) Rc = 2.4 ± 1.4 pc; (c) Rc = 1.0 ± 0.8 pc.
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