2024MNRAS.531.1191A

Query : 2024MNRAS.531.1191A

2024MNRAS.531.1191A - Mon. Not. R. Astron. Soc., 531, 1191-1202 (2024/June-2)

Kinematic substructure in star clusters constrains star cluster formation.

ARNOLD B. and WRIGHT N.J.

Abstract (from CDS):

The spatial-kinematic structure of 48 young star clusters and associations is investigated. Moran's I statistic is used to quantify the degree of kinematic substructure in each region, and the results are compared to those expected assuming the hierarchical or monolithic models of star cluster formation. Of the observed regions, 39 are found to have significant kinematic substructure, such that they are compatible with the hierarchical model and incompatible with the monolithic model. This includes multiple regions whose Q parameter shows the region to be centrally concentrated and clustered. The remaining nine are compatible with both models. From this, it is concluded that the kinematic substructure of the observed star clusters represents strong evidence in favour of the hierarchical model of star cluster formation over the monolithic model.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): methods: statistical - stars: formation - stars: kinematics and dynamics - open clusters and associations: general

Simbad objects: 49

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Number of rows : 49
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Alessi 20 OpC 00 10 30.5 +58 45 18           ~ 55 0
2 IC 1805 OpC 02 32 52.1 +61 28 36           ~ 542 1
3 * o Ori SB* 05 21 45.7473567408 -00 22 56.880734196 3.79 4.58 4.74 4.79 4.97 B2IV 246 0
4 * eta Ori bC* 05 24 28.61672 -02 23 49.7311 2.25 3.18 3.35 3.44 3.65 B1V+B2: 412 0
5 * psi01 Ori Be* 05 24 44.8273848312 +01 50 47.201915688 3.83 4.76 4.96 5.04 5.26 B1Vn 372 0
6 * psi02 Ori bC* 05 26 50.2293232104 +03 05 44.422154160 3.45 4.398 4.611     B2IV 218 0
7 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
8 Barnard 30 DNe 05 30.3 +12 46           ~ 56 0
9 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
10 * lam Ori ** 05 35 08.27761 +09 56 02.9611 2.45 3.48 3.66 3.72 3.89 O8IIIf+B0.5V 327 0
11 NAME Ori Complex Cld 05 35.3 -05 23           ~ 481 0
12 NGC 1981 OpC 05 35 24.4 -04 29 58     4.2     ~ 99 0
13 LDN 1614 DNe 05 35.5 -00 38           ~ 3 0
14 * eps Ori s*b 05 36 12.81335 -01 12 06.9089 0.48 1.51 1.69 1.76 1.93 B0Ia 921 0
15 * sig Ori Y*O 05 38 44.7653828520 -02 36 00.283179888 2.54 3.58 3.79 3.87 4.11 O9.5V+B0.2V(n) 855 0
16 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 375 0
17 LDN 1647 DNe 05 42.4 -09 58           ~ 46 0
18 Barnard 35 DNe 05 45.5 +09 03           ~ 65 0
19 UPK 402 OpC 05 50 03.0 +02 49 21           ~ 12 0
20 Cl Pismis 27 OpC 06 10 52.5 +20 37 05           ~ 31 0
21 Cl VDB 80 OpC 06 31 05.3 -09 36 35           ~ 26 1
22 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
23 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
24 NAME Mon OB1 D PoC 06 41 09.9 +09 34 34           ~ 64 1
25 Cl VDB 92 OpC 07 04 11.3 -11 27 06           ~ 43 1
26 [BDS2003] 96 OpC 07 05 20.3 -12 19 38           ~ 32 0
27 NGC 2362 OpC 07 18 41.9 -24 57 08           ~ 428 0
28 NAME Pozzo 1 OpC 08 09 18.7 -47 20 35           ~ 51 0
29 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 307 0
30 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 951 0
31 Cl Gulliver 2 OpC 08 11 36.5 -37 23 51           ~ 18 0
32 Cl Gulliver 10 OpC 08 12 09.7 -38 41 34           ~ 18 0
33 ESO 313-13 OpC 08 44 51.8 -41 17 02   7.01 6.7     ~ 95 0
34 GRS G263.00 +01.40 HII 08 51.3 -42 05           ~ 18 0
35 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0
36 Cl Trumpler 16 OpC 10 45 01.9 -59 42 00           ~ 510 0
37 NGC 6193 OpC 16 41 14.9 -48 46 47           ~ 169 0
38 ESO 332-11 OpC 16 55 38.3 -40 45 06           ~ 21 0
39 Cl VDBH 205 OpC 16 56 21.7 -40 38 01           ~ 39 0
40 Cl Bochum 13 OpC 17 17 17.7 -35 32 30   7.84 7.2     ~ 69 0
41 NGC 6383 OpC 17 34 41.6 -32 34 27           ~ 168 0
42 NGC 6530 OpC 18 04 31 -24 21.5           ~ 443 0
43 NAME Dias 5 OpC 18 17 31.4 -19 42 54           ~ 31 0
44 UBC 344 OpC 18 17 54.0 -12 04 59           ~ 9 0
45 NGC 6871 OpC 20 06 07.9 +35 46 45   5.43 5.2     ~ 237 0
46 Cl Biurakan 2 OpC 20 09 12.4 +35 29 23           ~ 61 0
47 Cl Berkeley 87 OpC 20 21 35.0 +37 25 14           ~ 141 0
48 NAME Pismis-Moreno 1 OpC 22 18 38.4 +63 14 19           ~ 44 0
49 NAME Carina Association As* ~ ~           ~ 188 1

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