Free Access
 

 

Table 1:

List of candidate binary clusters (WEBDA).
Pair # Cluster 1 Cluster 2 $\tau_1$ $\tau_2$ $\Delta t$ S d $V_{\rm r}$ 1 pm RA 1 pm dec 1 $V_{\rm r}$ 2 pm RA 2 pm dec 2
      (Myr) (Myr) (Myr) (pc) (pc) (km s-1) (mas yr-1) (mas yr-1) (km s-1) (mas yr-1) (mas yr-1)
1 ASCC 100 ASCC 101 102 331 229 23 350 -22.89 2.29 -1.51 - 0.81 1.87
2 Collinder 70 NGC 1981 5 32 26 24 391 19.49 0.36 -0.68 27.94 1.01 1.14
3 NGC 1976 NGC 1981 13 32 19 7 400 - 1.67 -0.3 27.94 1.01 1.14
4 ASCC 20 ASCC 16 22 8 14 13 460 17.62 -0.09 0.51 0.75 0.75 -0.18
5 NGC 6405 ASCC 90 94 646 551 26 500 10.4 -2.19 -5.4 - -2.49 -3.64
6 ASCC 21 ASCC 18 13 13 0 25 500 19.9 0.52 -0.62 13.39 0.89 -0.02
7 Loden 1171 Loden 1194 282 339 57 14 500 - -13.46 -5.75 - -10.07 -3.29
8 Loden 46 ASCC 34 1071 398 673 29 540 - -14.11 2.98 - -2.36 -1.87
9 Loden 46 NGC 3228 1071 85 986 30 544 - -14.11 2.98 - -15.64 -0.05
10 NGC 6469 Ruprecht 139 229 1122 893 21 550 - 3.04 -1.2 - -1.1 -2.19
11 Johansson 1 Alessi 8 199 83 116 29 575 - - - - -6.05 -7.01
12 Ruprecht 139 Bochum 14 1122 10 1112 28 578 - -1.1 -2.19 - - -
13 Loden 565 ASCC 68 112 447 334 7 650 10.1 -3.14 -0.96 - -4.81 3.71
14 BH 91 Ruprecht 89 162 955 793 23 740 - -6.25 4.22 - -6.82 4.36
15 ASCC 4 NGC 189 219 10 209 22 752 -9.55 0.11 -1.48 - - -
16 NGC 1746 NGC 1758 155 398 243 2 760 2.0 -1.87 -3.07 - -1.44 -3.5
17 Basel 5 NGC 6425 741 22 719 28 778 - - - - 3.11 -2.79
18 Collinder 197 ASCC 50 13 30 17 20 838 33.1 -9.8 7.4 17.13 -6.39 3.85
19 NGC 6250 Lynga 14 26 5 21 21 865 - -0.19 -3.3 - - -
20 Ruprech 91 ESO 128-16 427 832 405 17 900 7.3 -11.1 3.11 - -2.57 6.1
21 NGC 2447 NGC 2448 387 15 372 15 1037 21.7 -4.85 4.47 15.0 -3.8 4.69
22 Ruprecht 172 Biurakan 2 813 10 803 11 1106 - -0.42 -3.97 - -2.52 -6.53
23 NGC 6242 Trumpler 24 41 8 32 25 1138 - 0 1.65 -4 -0.87 -1.27
24 NGC 2302 NGC 2306 70 708 638 22 1182 - - - - -0.98 1.91
25 ASCC 6 Stock 4 148 501 353 21 1200 -20.0 -1.02 -1.18 - 1.47 1.18
26 NGC 6613 NGC 6618 17 1 16 22 1296 -14.0 -1.02 -1.33 - 1.79 -1.96
27 Basel 8 NGC 2251 126 267 141 7 1329 - - - 24.7 - -
28 Markarian 38 Collinder 469 8 63 55 22 1471 -18.0 0.07 -2.2 - - -
29 Trumpler 22 NGC 5617 89 82 7 21 1516 - - - - -2.04 -2.32
30 NGC 6871 Biurakan 1 9 18 9 27 1574 -7.7 -2.89 -5.65 -8.48 -3.51 -6.24
31 Carraro 1 Loden 165 3020 3020 0 10 1900 - - - - - -
32 NGC 659 NGC 663 35 16 19 25 1938 - -2.67 1.07 -32.0 -1.49 -2.3
33 Ruprecht 151 NGC 2428 309 479 170 19 2100 - -4.3 2.1 - -2.02 1.12
34 NGC 3324 NGC 3293 6 10 5 21 2327 - -7.46 3.11 -13.0 -7.53 3.1
$\tau_i$: cluster age in Myr (i = 1, 2); $\Delta t = \tau_1 - \tau_2$: age difference in Myr; S: cluster pair spatial separation in pc; d: heliocentric distance to the closest member of the pair in pc; $V_{\rm r} i$: average radial velocity in km s-1; pm RA i: average proper motion in RA ( ${=}\mu_{\alpha}\cos\delta$) mas yr-1; pm dec i: average proper motion in Dec ( ${=}\mu_{\delta}$) mas yr-1.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.