1995A&A...302...86S

Query : 1995A&A...302...86S

1995A&A...302...86S - Astronomy and Astrophysics, volume 302, 86-89 (1995/10-1)

Probable binary open star clusters in the Galaxy.

SUBRAMANIAM A., GORTI U., SAGAR R. and BHATT H.C.

Abstract (from CDS):

The existence of double/binary clusters in the Magellanic Clouds is fairly well established, whereas only one such pair, h + χ Persei, is known in the Galaxy. From the catalogues of open clusters of the Galaxy, we have identified 18 probable pairs of clusters (with known distances), with spatial separations less than 20pc. The tidal disruption timescales for these pairs, due to Galactic differential rotation are calculated, using cluster data where available or by assuming typical values. In some cases, these timescales are larger than the average open cluster lifetime, ≃108yr. About 8% of open clusters appear to be members of binary systems, and hence binary cluster systems may not be very uncommon in the Galaxy.

Abstract Copyright: ∼

Journal keyword(s): open clusters: general - galaxies: star clusters

Simbad objects: 39

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Number of rows : 39
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 Cl Alter 1 OpC 00 31 57 +63 09.8   9 8.5     ~ 43 0
2 NGC 146 OpC 00 33 03 +63 19.0   9.59 9.1     ~ 64 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11141 1
4 NGC 869 OpC 02 18 57.8 +57 08 02           ~ 476 0
5 NGC 884 OpC 02 22 20.2 +57 08 56           ~ 486 0
6 NGC 1513 OpC 04 09 52.8 +49 30 14   8.71 8.4     ~ 62 0
7 NGC 1545 OpC 04 20 48.5 +50 13 16   7.2 6.2     ~ 111 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17421 0
9 NGC 1907 OpC 05 28 07.9 +35 19 48   8.87 8.2     ~ 128 2
10 M 38 OpC 05 28 40.1 +35 49 26   6.69 6.4     ~ 159 2
11 NGC 1981 OpC 05 35 23.5 -04 29 10     4.2     ~ 86 0
12 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 61 0
13 NGC 2251 OpC 06 34 43.2 +08 20 13   7.69 7.3     ~ 113 0
14 NGC 2264 OpC 06 40 52.1 +09 52 37           ~ 1793 0
15 Cl Haffner 3 OpC 07 04 06.5 -06 07 59           ~ 22 0
16 NGC 2383 OpC 07 24 41.8 -20 56 56   8.88 8.4     ~ 70 0
17 NGC 2384 OpC 07 25 10 -21 01.3   7.47 7.4     ~ 74 0
18 Cl Haffner 18 OpC 07 52 40.3 -26 23 13   10.09 9.3     ~ 53 1
19 Cl Haffner 19 OpC 07 52 46 -26 16.4           ~ 56 0
20 NGC 2645 OpC 08 39 06 -46 14.1           ~ 68 0
21 Cl Pismis 8 OpC 08 41 38 -46 16.3   10.10 9.5     ~ 41 0
22 NGC 3247 OpC 10 25 52 -57 55.6   7.99 7.6     ~ 38 0
23 IC 2581 OpC 10 27 28.1 -57 37 34   4.79 4.3     ~ 134 0
24 Cl Hogg 10 OpC 11 10 39 -60 23.1           ~ 49 0
25 Cl Hogg 11 OpC 11 11 32 -60 22.3   8.21 8.1     ~ 33 0
26 Cl Basel 18 OpC 13 27 52.1 -62 18 22   8.50 8.2     ~ 41 1
27 Cl Collinder 271 OpC 13 29 48.7 -64 11 56   9.10 8.7     ~ 28 0
28 NGC 6152 OpC 16 32 51.1 -52 37 44     8.1     ~ 35 0
29 NGC 6208 OpC 16 49 20.6 -53 42 50   8.06 7.2     ~ 80 0
30 NGC 6383 OpC 17 34 41.5 -32 34 23           ~ 156 0
31 Cl Trumpler 28 OpC 17 36 55.4 -32 28 08           ~ 54 0
32 NGC 6755 OpC 19 07 46.1 +04 13 26   8.60 7.5     ~ 84 0
33 NGC 6756 OpC 19 08 43.4 +04 42 40     10.6     ~ 39 0
34 NGC 6997 OpC 20 56 30.7 +44 38 24     10.0     ~ 46 1
35 Cl Collinder 428 OpC 21 03 04 +44 33.6     8.7     ~ 18 0
36 NGC 7031 OpC 21 07 14.2 +50 52 12   10.01 9.1     ~ 59 1
37 NGC 7086 OpC 21 30 29.8 +51 35 35   9.25 8.4     ~ 82 1
38 NGC 7429 OpC 22 55 53 +59 57.6           ~ 13 0
39 Cl Mrk 50 OpC 23 15 13 +60 26.9   9.09 8.5     ~ 52 0

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