2025A&A...693A.125H

Query : 2025A&A...693A.125H

2025A&A...693A.125H - Astronomy and Astrophysics, volume 693A125 (2025/1-1)

3D projection analysis: Characterizing the morphological stability of nearby open clusters.

HU Q., QIN S., LUO Y. and LI Y.

Abstract (from CDS):

Context. The study of open cluster morphology is pivotal for exploring their formation and evolutionary processes.
Aims. We manage to assess the morphological stability of 105 nearby open clusters within tidal radii on the X-Y, X-Z, and Y-Z planes of the heliocentric Cartesian coordinate system, utilizing member catalogs from the literature. Meanwhile, we also delve into factors potentially impacting the clusters' morphological stability on these projection planes.
Methods. We used the rose diagram method by constructing the 3D projected morphology of sample clusters to quantify the morphological stability of their 3D projected morphology.
Results. Our analysis indicates there is a demonstrated linear positive correlation between the number of sample clusters' member stars within tidal radii and their morphological stability in different 3D projection planes. This may suggest that the more member stars there are within the tidal radius of a cluster, the stronger its own gravitational binding capacity is, resulting in strong morphological stability. We find a direct link between the clusters' morphological stabilities in the X-Z plane within tidal radii and their velocity dispersion in the same plane, suggesting that the morphological stabilities in the X-Z plane may be dependent on internal dynamics. Moreover, the morphological stability of the clusters' 3D projection is influenced by their spatial positions along the Y axis, but not linearly, indicating that the environmental changes at the clusters' location may affect their morphological stability. Likewise, specific external forces can have an effect on their morphological stability.
Conclusions. This research introduces a novel perspective for understanding the morphological stability of open clusters, with a particular focus on their 3D projected morphologies.

Abstract Copyright: © The Authors 2025

Journal keyword(s): open clusters and associations: general

VizieR on-line data: <Available at CDS (J/A+A/693/A125): tablea1.dat tablea2.dat tablea3.dat>

Simbad objects: 106

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Number of rows : 106
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 Blanco 1 OpC 00 03 04.1 -29 48 55           ~ 380 0
2 Cl Alessi 20 OpC 00 10 30.5 +58 45 18           ~ 55 0
3 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
4 Cl Stock 2 OpC 02 15 47.8 +59 33 12           ~ 155 0
5 UPK 305 OpC 02 43 50.8 +39 44 39           ~ 18 0
6 UPK 303 OpC 02 44 48.4 +40 15 41           ~ 22 0
7 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
8 Cl Alessi 13 OpC 03 27 32.7 -35 50 45           ~ 92 0
9 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
10 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
11 UBC 19 OpC 03 45 29.1 +29 48 12           ~ 18 0
12 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
13 UBC 31 OpC 04 04 17.5 +33 00 19           ~ 24 0
14 NAME HIP 21974 Cluster OpC 04 37 00.6 +71 16 52           ~ 62 0
15 NGC 1662 OpC 04 48 48.5 +10 52 46   7.0 6.4     ~ 149 0
16 Cl Alessi 96 OpC 05 02 07.1 +37 30 41           ~ 30 0
17 UPK 385 OpC 05 03 07.2 +12 58 17           ~ 18 0
18 NGC 1901 OpC 05 18 45.8 -68 09 13           ~ 123 0
19 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
20 [KPR2005] 19 OpC 05 28 06.0 -01 56 32           ~ 75 0
21 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
22 UBC 17b OpC 05 32 54.9 -01 41 18           ~ 22 0
23 Cl Gulliver 6 OpC 05 33 01.0 -01 41 27           ~ 39 0
24 UBC 17a OpC 05 34 05.7 -01 25 38           ~ 25 0
25 NGC 1977 OpC 05 35 12.7 -04 48 21           ~ 256 0
26 NGC 1980 OpC 05 35 15.5 -05 55 46     2.5     ~ 132 0
27 NGC 1981 OpC 05 35 24.4 -04 29 58     4.2     ~ 99 0
28 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
29 UBC 8 OpC 05 37 27.6 +57 07 48           ~ 23 0
30 Cl Stock 10 OpC 05 39 30.6 +37 49 20           ~ 59 0
31 NAME lambda Orion South Group OpC 05 44 15.0 +07 01 10           ~ 14 0
32 UPK 402 OpC 05 50 03.0 +02 49 21           ~ 12 0
33 UPK 422 OpC 05 52 26.0 -07 33 31           ~ 21 0
34 NGC 2232 OpC 06 27 45.6 -04 44 26           ~ 212 0
35 UPK 350 OpC 06 46 47.9 +48 48 54           ~ 17 0
36 Cl Alessi 36 OpC 07 06 57.9 -37 43 27           ~ 38 0
37 Cl Alessi 3 OpC 07 16 40.0 -46 16 35           ~ 71 0
38 Cl Collinder 135 OpC 07 17 23.6 -36 57 23           ~ 124 0
39 Cl Collinder 140 OpC 07 23 23.9 -31 58 15           ~ 154 0
40 NGC 2422 OpC 07 36 35.8 -14 30 15           ~ 275 0
41 UPK 540 OpC 07 38 56.7 -58 39 20           ~ 15 0
42 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
43 NGC 2451B OpC 07 44 22.6 -37 53 00           ~ 125 0
44 NAME Herschel 1 OpC 07 46 45.7 +00 09 45           ~ 50 0
45 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
46 UBC 480 OpC 07 58 53.8 -50 40 25           ~ 11 0
47 NAME Pozzo 1 OpC 08 09 18.7 -47 20 35           ~ 51 0
48 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
49 UPK 533 OpC 08 13 47.7 -52 26 50           ~ 17 0
50 [KC2019] Theia 80 As* 08 15 08.043 -35 37 48.89           ~ 4 0
51 UBC 12 OpC 08 23 58.7 -08 26 19           ~ 16 0
52 UPK 535 OpC 08 28 30.0 -50 53 14           ~ 15 0
53 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
54 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
55 UPK 545 OpC 08 43 48.3 -58 34 44           ~ 24 0
56 Cl Trumpler 10 OpC 08 47 46.4 -42 31 52           ~ 203 0
57 Cl Platais 8 OpC 09 06 04.4 -58 25 09           ~ 97 0
58 Cl Platais 9 OpC 09 11 49 -43 31.8           ~ 74 0
59 Cl Turner 5 OpC 09 34 04.0 -36 26 03           ~ 48 0
60 [KPR2005] 58 OpC 10 14 01.8 -55 06 13           ~ 53 0
61 NGC 3228 OpC 10 21 34.1 -51 45 39           ~ 98 0
62 [PKV98] HIP 51688 OpC 10 34 25.9 -47 10 58           ~ 18 0
63 Cl VDBH 99 OpC 10 38 23.9 -59 09 28           ~ 91 0
64 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
65 Cl Alessi 5 OpC 10 43 20.9 -61 05 49           ~ 61 0
66 NGC 3532 OpC 11 05 33.9 -58 42 13           ~ 414 0
67 Cl Ruprecht 98 OpC 11 59 32.8 -64 31 32           ~ 65 0
68 [KC2019] Theia 75 As* 13 20 19.36 -70 11 33.7           ~ 3 0
69 Cl Platais 10 OpC 13 41 55.8 -59 12 31           ~ 52 0
70 UBC 11 OpC 16 26 34.2 -59 47 57           ~ 14 0
71 UPK 640 OpC 16 41 18.4 -39 36 44           ~ 28 0
72 UPK 612 OpC 16 52 58.3 -67 52 50           ~ 31 0
73 UPK 624 OpC 16 56 05.7 -60 25 33           ~ 15 0
74 Cl Alessi 24 OpC 17 23 12.7 -62 39 53           ~ 45 0
75 NGC 6405 OpC 17 40 14.5 -32 14 16           ~ 235 0
76 Cl Alessi 9 OpC 17 44 16.5 -47 03 45           ~ 66 0
77 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
78 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0
79 Cl Collinder 350 OpC 17 47 54.6 +01 31 22     6.1     ~ 73 0
80 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
81 Mamajek 4 OpC 18 13 40.3 -53 57 16           ~ 13 0
82 Cl Gulliver 20 OpC 18 14 43.9 +11 02 05           ~ 29 0
83 UBC 9 OpC 18 26 34.6 +26 27 16           ~ 14 0
84 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0
85 UBC 32 OpC 18 37 30.4 -14 10 19           ~ 20 0
86 IC 4756 OpC 18 38 39.0 +05 26 14           ~ 274 0
87 UPK 20 OpC 18 44 35.6 -14 27 54           ~ 13 0
88 [KPR2005] 99 OpC 18 48 40.8 -18 27 04           ~ 42 0
89 NAME del Lyr Cluster OpC 18 54 11.2 +36 53 54   4.58 3.8     ~ 97 0
90 UBC 1 OpC 19 11 53.8 +56 51 19           ~ 26 0
91 [KPR2005] 101 OpC 19 13 29.5 +36 19 29           ~ 48 0
92 NGC 6774 OpC 19 16 17.6 -16 20 45           ~ 258 0
93 Teutsch 35 OpC 19 36 32.1 +35 45 00           ~ 44 0
94 Cl Stock 1 OpC 19 36 35.9 +25 07 31     5.3     ~ 72 0
95 Cl Alessi 10 OpC 20 04 51.3 -10 31 20           ~ 50 0
96 RSG 5 OpC 20 14 13.9 +45 34 26           ~ 43 0
97 Cl Roslund 6 OpC 20 29 00.4 +40 01 11           ~ 66 0
98 UPK 88 OpC 20 39 12.5 +21 27 41           ~ 9 0
99 NGC 7058 OpC 21 21 46.1 +50 49 43           ~ 48 0
100 NGC 7092 OpC 21 31 04.0 +48 17 47           ~ 245 0
101 [KPR2005] 123 OpC 22 42 14.8 +54 00 20           ~ 49 0
102 RSG 7 OpC 22 56 51.0 +59 26 36           ~ 34 0
103 RSG 8 OpC 22 58 57.1 +59 23 34           ~ 35 0
104 [KPR2005] 127 OpC 23 09 14.3 +64 59 56           ~ 51 0
105 Cl Stock 12 OpC 23 35 40.6 +52 40 19           ~ 56 0
106 NAME Aveni-Hunter 1 OpC 23 36 38.7 +48 11 48           ~ 40 0

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