2010A&A...511A..38V


Query : 2010A&A...511A..38V

2010A&A...511A..38V - Astronomy and Astrophysics, volume 511, A38-38 (2010/2-2)

Open clusters in the third galactic quadrant. III. Alleged binary clusters.

VAZQUEZ R.A., MOITINHO A., CARRARO G. and DIAS W.S.

Abstract (from CDS):

We aim to determine accurate distances and ages of eight open clusters in order to: (1) assess their possible binarity (2) provide probes to trace the structure of the Third Galactic Quadrant. Cluster reddenings, distances, ages and metallicities are derived from ZAMS and isochrone fits in UBVRI photometric diagrams. Field contamination is reduced by restricting analysis to stars within the cluster limits derived from star counts. Further membership control is done by requiring that stars have consistent positions in several diagrams and by using published spectral types. The derived distances, ages and metallicities have shown that none of the analysed clusters compose binary/double systems. Of the four candidate pairs, only NGC 2383/NGC 2384 are close to each other, but have different metallicities and ages. Ruprecht 72 and Ruprecht 158 are not clusters but fluctuations of the field stellar density. Haffner 18 is found to be the superposition of two stellar groups at different distances: Haffner 18(1) at 4.5kpc and Haffner 18(2) between 9.5 and 11.4kpc from the Sun. The derived distances and ages have been used to situate the clusters in the Galactic context. In particular, young stellar groups trace spiral structure at large Galactocentric radii. At least two clusters formed during the last few 108yr in an interstellar medium with less than solar abundances. In contrast with the LMC, double clusters are apparently rare, or even non existent, in the undisturbed environment of the Third Galactic Quadrant. This leaves open the question of whether binary clusters form more easily toward denser and more violent regions of the Milky Way such as the inner Galaxy.

Abstract Copyright:

Journal keyword(s): Galaxy: structure - open clusters and associations: general

VizieR on-line data: <Available at CDS (J/A+A/511/A38): clusters.dat table1.dat table2.dat table3.dat table4.dat>

Nomenclature: Tables 1-4: [VMC2010] DDD.ddddd+DD.ddddd N=10955.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 67

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Number of rows : 67
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 869 OpC 02 19 00 +57 07.7           ~ 441 0
2 NGC 884 OpC 02 22 23 +57 07.5           ~ 455 0
3 BD-20 1909 * 07 24 31.9664992164 -20 57 09.941475947   11.4 9.88     M2 15 0
4 NGC 2383 7 * 07 24 34.8883351851 -20 56 46.997840382   12.90 11.62     K3III 3 0
5 NGC 2383 10 Be? 07 24 38.997 -20 57 22.67   12.84 12.75     A3V 3 0
6 NGC 2383 OpC 07 24 40 -20 56.9   8.88 8.4     ~ 56 0
7 NGC 2383 9 * 07 24 42.9613556046 -20 54 48.367202169   13.18 11.96     K2III 3 0
8 BD-20 1913 Em* 07 24 43.7846087185 -20 56 15.837672735 9.3 9.92 9.96     B0III 12 0
9 HD 58440 * 07 24 49.7935180210 -20 56 15.870401574   10.01 9.74     A9V 9 0
10 NGC 2384 OpC 07 25 10 -21 01.3   7.47 7.4     ~ 68 0
11 CPD-20 2376 * 07 25 13.3848290255 -21 01 55.517537246 9.3 10.19 10.18 10.28   B3IV 17 0
12 CPD-20 2379 * 07 25 16.4562812435 -21 00 40.617799235   10.80 10.8     B5: 6 0
13 C 0726-153 OpC 07 28 22 -15 24.3   10.81 10.3     ~ 19 0
14 C 0726-152 OpC 07 28 35 -15 21.9   12.60 11.5     ~ 20 0
15 NGC 2401 OpC 07 29 24 -13 58.3     12.6     ~ 21 0
16 Cl Alessi 18 OpC 07 37 11.0 -26 23 18           ~ 6 1
17 C 0735-264 OpC 07 37 34 -26 30.0           ~ 24 0
18 NGC 2425 OpC 07 38 15 -14 52.8           ~ 29 0
19 NGC 2467 HII 07 52 18 -26 25.7           ~ 178 1
20 [FM74] 2058 * 07 52 29.7382999714 -26 22 35.979688451           G7V 3 0
21 Cl* Haffner 18 MCB 34 * 07 52 31.6944537753 -26 21 55.545353226   15.103 14.520     B6V 4 0
22 [FM74] 3063 * 07 52 34.7360683289 -26 23 14.784241310   14.89 13.56     G8II 4 0
23 CD-26 5123 * 07 52 35.10 -26 21 59.3 12.09 11.05 10.00     G8V 5 0
24 [FM74] 3082 * 07 52 35.7727156465 -26 22 33.342995439   15.36 14.92     B1V: 5 0
25 NGC 2467 35 * 07 52 35.9789909486 -26 18 31.448274620 12.91 12.85 12.66 12.59 12.46 A0 3 0
26 CPD-26 2704 * 07 52 36.5888727707 -26 22 41.870675801 10.84 11.50 11.16 11.15   O7V(n) 21 0
27 Cl* Haffner 18 MCB 21 * 07 52 37.0189170141 -26 21 52.250053240 13.56 12.89 11.85 11.27 10.76 G0.5V 5 0
28 Cl* Haffner 18 LSS 37 * 07 52 37.1896750578 -26 22 59.891235365   15.20 14.59     B5 4 0
29 Cl* Haffner 18 LSS 38 * 07 52 37.6829100909 -26 22 57.687076230   13.06 12.88     ~ 5 0
30 Cl* Haffner 18 LSS 49 * 07 52 37.8554094523 -26 22 33.841139681   16.496 16.015     B3V: 5 0
31 [FM74] 3060 * 07 52 38.0681219264 -26 24 11.879638035   14.63 14.43     K0II/III 5 0
32 [FM74] 3066 * 07 52 38.1330037575 -26 23 31.193218403 15.45 15.47 14.52     B1V 8 0
33 [FM74] 3078 * 07 52 38.3097190205 -26 22 32.001511383   14.74 14.39     B2V: 5 0
34 Cl* Haffner 18 LSS 32 * 07 52 38.5671900317 -26 23 09.878016592   15.071 14.413     B1V 9 0
35 C 0750-262 OpC 07 52 39 -26 22.8   10.09 9.3     ~ 43 1
36 Cl* Haffner 18 MCB 43 * 07 52 39.1365409573 -26 23 22.384226071 11.84 12.42 12.12 11.92   O8V 18 0
37 [FM74] 3070 * 07 52 39.5171765176 -26 23 11.480679434 13.32 13.81 13.48     09.5V 10 0
38 [FM74] 3077 * 07 52 40.0581611201 -26 22 34.737501058   14.49 12.97     K3III 7 0
39 [FM74] 3057 * 07 52 40.960 -26 23 48.33   15.23 14.67     B6V 7 0
40 [FM74] 3058 * 07 52 41.8267372290 -26 23 52.454753318   15.11 14.69     B2V 5 0
41 [FM74] 3059 * 07 52 42.2200714825 -26 24 01.123809323   14.52 14.40     B8V 5 0
42 Cl* Haffner 18 MCB 6 * 07 52 42.5973839636 -26 22 41.819723450   16.188 15.843     F5V: 5 0
43 WRAY 15-101 Em* 07 52 42.8885867383 -26 24 12.783568517 11.39 12.11 11.92 11.97   OB: 23 0
44 NGC 2467 37 * 07 52 42.8932081665 -26 21 52.428555993 12.96 12.92 12.50 12.22 12.01 A4V 6 0
45 [FM74] 3092 * 07 52 43.16 -26 21 10.5 13.36 13.08 12.73     A0: 1 0
46 NGC 2467 39 * 07 52 44.5254037093 -26 17 26.817796092 11.82 12.54 12.40 12.19 12.05 ~ 16 0
47 Cl* Haffner 18 LSS 9 * 07 52 44.6030368955 -26 24 38.997671763 16.901 16.586 16.107 16.36 15.45 F0II 4 0
48 [FM74] 4095 * 07 52 45.7123719544 -26 22 56.798386946     14.707 14.601   B4V 4 0
49 [FM74] 4096 * 07 52 46.2645469518 -26 23 08.195753840     14.086     F7III 3 0
50 CD-25 5202 * 07 52 46.535 -26 16 46.21 10.82 11.35 11.09 10.99   B1.5V 20 0
51 Cl* Haffner 19 FM 4052 * 07 52 46.89 -26 16 48.1 12.33 12.86 12.58     B2V 12 0
52 C 0750-261 OpC 07 52 47 -26 17.0   9.60 9.4     ~ 49 0
53 Cl* Haffner 19 MC 50 * 07 52 47.5784987590 -26 16 37.239244155 12.68 13.29 13.05     B3 10 0
54 [FM74] 4094 * 07 52 47.6895417560 -26 22 48.052076514           F5V 3 0
55 Cl* Haffner 19 LSS 22 * 07 52 47.78 -26 16 32.7   14.17 13.84     B7V 6 0
56 NGC 2467 45 * 07 52 50.4419627412 -26 22 38.862587880 12.82 12.59 12.20 11.91 11.64 G5V: 6 0
57 Ass Pup OB 2 As* 07 57 -27.5           ~ 22 0
58 C 0803-316 OpC 08 05 04 -31 49.0           ~ 9 0
59 C 0803-318 OpC 08 05 13 -31 58.2           ~ 8 0
60 NGC 2588 OpC 08 23 13 -32 58.2     11.8     ~ 14 0
61 NGC 2635 OpC 08 38 28 -34 45.6   12.06 11.2     ~ 28 0
62 C 0843-314 OpC 08 45 02 -31 37.5     10.5     ~ 5 0
63 C 0843-315 OpC 08 45 18.00 -31 46 00.0     11.2     ~ 3 0
64 C 0850-374 OpC 08 52 03 -37 36.6           ~ 7 0
65 Cl Ruprecht 158 OpC 08 52 26 -37 33.3           ~ 10 0
66 Cl Trumpler 14 OpC 10 43 56 -59 33.0   5.70 5.5     ~ 455 0
67 Cl Trumpler 16 OpC 10 45 10 -59 43.0   5.35 5.0     ~ 447 0

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2021.10.27-09:56:12

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