2023AJ....166..110P

Query : 2023AJ....166..110P

2023AJ....166..110P - Astron. J., 166, 110 (2023/September-0)

Binary Star Evolution in Different Environments: Filamentary, Fractal, Halo, and Tidal Tail Clusters.

PANG X., WANG Y., TANG S.-Y., RUI Y., BAI J., LI C., FENG F., KOUWENHOVEN M.B.N., CHEN W.-P. and CHUANG R.-J.

Abstract (from CDS):

Using membership of 85 open clusters from previous studies based on Gaia Data Release 3 data, we identify binary candidates in the color-magnitude diagram for systems with mass ratio q > 0.4. The binary fraction is corrected for incompleteness at different distances due to the Gaia angular resolution limit. We find a decreasing binary fraction with increasing cluster age, with substantial scatter. For clusters with a total mass >200 M⊙, the binary fraction is independent of cluster mass. The binary fraction depends strongly on stellar density. Among the four types of cluster environments, the lowest-density filamentary and fractal stellar groups have the highest mean binary fraction: 23.6% and 23.2%, respectively. The mean binary fraction in tidal tail clusters is 20.8% and is lowest in the densest halo-type clusters: 14.8%. We find clear evidence of early disruptions of binary stars in the cluster sample. The radial binary fraction depends strongly on the clustercentric distance across all four types of environments, with the smallest binary fraction within the half-mass radius rh and increasing toward a few rh. Only hints of mass segregation are found in the target clusters. The observed amounts of mass segregation are not significant enough to generate a global effect inside the target clusters. We evaluate the bias of unresolved binary systems (assuming a primary mass of 1 M⊙) in 1D tangential velocity, which is 0.1-1 km s–1. Further studies are required to characterize the internal star cluster kinematics using Gaia proper motions.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Open star clusters - Star clusters - Binary stars - Dynamical evolution

Simbad objects: 61

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Number of rows : 61
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 Cl Stock 23 OpC 03 16 03.0 +60 19 52           ~ 54 0
4 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
5 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
6 UBC 19 OpC 03 45 29.1 +29 48 12           ~ 18 0
7 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
8 UBC 31 OpC 04 04 17.5 +33 00 19           ~ 24 0
9 NGC 1818 GlC 05 04 13.300 -66 26 05.47           ~ 279 0
10 NGC 1901 OpC 05 18 45.8 -68 09 13           ~ 123 0
11 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
12 [KPR2005] 19 OpC 05 28 06.0 -01 56 32           ~ 75 0
13 Cl Gulliver 6 OpC 05 33 01.0 -01 41 27           ~ 39 0
14 NGC 1977 OpC 05 35 12.7 -04 48 21           ~ 256 0
15 NGC 1980 OpC 05 35 15.5 -05 55 46     2.5     ~ 132 0
16 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
17 NGC 2232 OpC 06 27 45.6 -04 44 26           ~ 212 0
18 Cl Alessi 36 OpC 07 06 57.9 -37 43 27           ~ 38 0
19 Cl Gulliver 21 OpC 07 08 04.8 -25 25 20           ~ 33 0
20 Cl Alessi 3 OpC 07 16 40.0 -46 16 35           ~ 71 0
21 Cl Collinder 135 OpC 07 17 23.6 -36 57 23           ~ 124 0
22 Cl Collinder 140 OpC 07 23 23.9 -31 58 15           ~ 154 0
23 NGC 2442 LIN 07 36 23.7700545576 -69 31 50.997856332 11.47 11.15 10.42 9.71 10.4 ~ 243 1
24 NGC 2422 OpC 07 36 35.8 -14 30 15           ~ 275 0
25 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
26 NGC 2451B OpC 07 44 22.6 -37 53 00           ~ 125 0
27 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
28 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
29 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
30 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
31 [KPR2005] 58 OpC 10 14 01.8 -55 06 13           ~ 53 0
32 NGC 3228 OpC 10 21 34.1 -51 45 39           ~ 98 0
33 Cl VDBH 99 OpC 10 38 23.9 -59 09 28           ~ 91 0
34 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
35 Cl Alessi 5 OpC 10 43 20.9 -61 05 49           ~ 61 0
36 NGC 3532 OpC 11 05 33.9 -58 42 13           ~ 414 0
37 Cl Melotte 111 OpC 12 11 54.9 +25 16 36           ~ 520 0
38 [TPY2019] Group-X OpC 14 30 04.2 +55 03 04           ~ 21 0
39 Cl VDBH 164 OpC 14 49 10.8 -66 24 23           ~ 58 0
40 Cl Alessi 24 OpC 17 23 12.7 -62 39 53           ~ 45 0
41 NGC 6405 OpC 17 40 14.5 -32 14 16           ~ 235 0
42 Cl Alessi 9 OpC 17 44 16.5 -47 03 45           ~ 66 0
43 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0
44 Cl Collinder 350 OpC 17 47 54.6 +01 31 22     6.1     ~ 73 0
45 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
46 Cl Mamajek 4 OpC 18 25 52.5 -50 39 31           ~ 44 0
47 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0
48 IC 4756 OpC 18 38 39.0 +05 26 14           ~ 274 0
49 NAME del Lyr Cluster OpC 18 54 11.2 +36 53 54   4.58 3.8     ~ 97 0
50 Cl Alessi 62 OpC 18 56 10.0 +21 34 57           ~ 44 0
51 NGC 6774 OpC 19 16 17.6 -16 20 45           ~ 258 0
52 Cl Stock 1 OpC 19 36 35.9 +25 07 31     5.3     ~ 72 0
53 [KPR2005] 105 OpC 19 42 25.1 +27 22 42           ~ 48 0
54 UPK 82 OpC 19 53 11.5 +26 21 42           ~ 23 0
55 Cl Roslund 5 OpC 20 10 30.5 +33 46 04           ~ 62 0
56 NGC 7058 OpC 21 21 46.1 +50 49 43           ~ 48 0
57 NGC 7092 OpC 21 31 04.0 +48 17 47           ~ 245 0
58 RSG 7 OpC 22 56 51.0 +59 26 36           ~ 34 0
59 RSG 8 OpC 22 58 57.1 +59 23 34           ~ 35 0
60 [KPR2005] 127 OpC 23 09 14.3 +64 59 56           ~ 51 0
61 Cl Stock 12 OpC 23 35 40.6 +52 40 19           ~ 56 0

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