2015MNRAS.453..106D

Query : 2015MNRAS.453..106D

2015MNRAS.453..106D - Mon. Not. R. Astron. Soc., 453, 106-112 (2015/October-2)

Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22.

DE SILVA G.M., CARRARO G., D'ORAZI V., EFREMOVA V., MacPHERSON H., MARTELL S. and RIZZO L.

Abstract (from CDS):

Using photometry and high-resolution spectroscopy we investigate for the first time the physical connection between the open clusters NGC 5617 and Trumpler 22. Based on new CCD photometry we report their spatial proximity and common age of ∼ 70 Myr. Based on high-resolution spectra collected using the HERMES and UCLES spectrographs on the Anglo-Australian telescope, we present radial velocities and abundances for Fe, Na, Mg, Al, Si, Ca, and Ni. The measured radial velocities are -38.63±2.25 km/s for NGC 5617 and -38.46±2.08 km/s for Trumpler 22. The mean metallicity of NGC 5617 was found to be [Fe/H] = -0.18±0.02 and for Trumpler 22 was found to be [Fe/H] = -0.17±0.04. The two clusters share similar abundances across the other elements, indicative of a common chemical enrichment history of these clusters. Together with common motions and ages we confirm that NGC 5617 and Trumpler 22 are a primordial binary cluster pair in the Milky Way.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): open clusters and associations: general - open clusters and associations: individual: NGC 5617 - open clusters and associations: individual: Trumpler 22

VizieR on-line data: <Available at CDS (J/MNRAS/453/106): table2.dat>

Nomenclature: Table 2: [DCD2015] NNNN N=22 among (Nos 794-1417).

Simbad objects: 70

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Number of rows : 70
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 NAME NGC 869/884 OpC 02 20.5 +57 08           ~ 72 0
3 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
5 PG 1323-086 HS* 13 25 39.4669501176 -08 49 19.067387484 12.660 13.341 13.481 13.529 13.608 sdB3IHe8 144 1
6 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
7 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
8 NGC 5617 94 * 14 29 23.9720372664 -60 41 49.916469840   13.54 13.18     ~ 6 0
9 NGC 5617 98 * 14 29 24.6791374440 -60 43 03.521965512   14.19 13.74     ~ 2 0
10 NGC 5617 114 * 14 29 28.4869720296 -60 44 41.452884132   12.87 12.51     ~ 4 0
11 NGC 5617 116 * 14 29 28.7394578376 -60 42 18.731051784   12.42 10.67     ~ 14 0
12 NGC 5617 129 * 14 29 30.7086797688 -60 42 24.144904836   14.27 13.89     ~ 5 0
13 NGC 5617 136 * 14 29 32.6230263432 -60 46 33.293393076   14.35 13.04     ~ 3 0
14 NGC 5617 143 * 14 29 35.1943882344 -60 38 55.889595312   13.93 13.50     ~ 6 0
15 NGC 5617 157 * 14 29 37.4598874200 -60 41 40.421727492   13.97 13.57     ~ 6 0
16 NGC 5617 162 * 14 29 38.4714774552 -60 47 16.780831728   14.31 13.68     ~ 2 0
17 NGC 5617 164B * 14 29 38.7755629988 -60 43 40.820510063   14.25 13.86     ~ 4 0
18 CPD-60 5385 Em* 14 29 42.5364180144 -60 45 17.132697144   11.73 11.39     ~ 11 0
19 NGC 5617 181 * 14 29 42.5970699336 -60 41 51.384153660   13.01 12.70     ~ 7 0
20 NGC 5617 184 * 14 29 42.8143131264 -60 46 19.700318748   13.16 12.81     ~ 6 0
21 [C2011b] 2348 * 14 29 43.7301666552 -60 42 46.809562536   12.48 12.13     ~ 4 0
22 NGC 5617 OpC 14 29 46.5 -60 43 02           ~ 108 0
23 NGC 5617 215 * 14 29 48.3484110072 -60 45 57.467382804   13.55 11.71 11.17 9.31 ~ 3 0
24 NGC 5617 216 * 14 29 48.5202670584 -60 42 58.184001144   11.26 10.96     ~ 8 0
25 NGC 5617 214 * 14 29 48.7260641544 -60 38 37.606136352   12.44 12.10     ~ 6 0
26 NGC 5617 220 * 14 29 48.8468286408 -60 39 27.345202416   13.19 12.81     ~ 3 0
27 NGC 5617 225 * 14 29 49.9512739992 -60 44 37.098497652   13.65 13.25     ~ 7 0
28 NGC 5617 227 * 14 29 50.1926599992 -60 41 12.190373484   12.06 10.42     ~ 13 0
29 NGC 5617 229 * 14 29 50.2817580552 -60 47 27.723876540   14.21 13.63     ~ 2 0
30 HD 126790 * 14 29 51.7023728208 -60 38 08.975120748   10.18 10.08     A0 7 0
31 NGC 5617 240 * 14 29 51.9771743232 -60 43 30.292427748   14.07 13.52     ~ 3 0
32 NGC 5617 254 * 14 29 55.4731444896 -60 42 26.408796588   14.15 13.75     ~ 5 0
33 CPD-60 5394 * 14 29 56.2765736976 -60 44 35.087554608   11.24 10.53 10.45 9.52 OB: 8 0
34 WRAY 15-1212 Em* 14 30 01.0704831216 -60 45 58.280456916   12.01 11.65     ~ 9 0
35 NGC 5617 275 * 14 30 01.9833337488 -60 40 26.534517276   14.51 13.96     ~ 3 0
36 [C2011b] 1720 * 14 30 02.4261439680 -60 42 20.490703092   12.77 12.48     ~ 3 0
37 NGC 5617 281 * 14 30 03.5736387696 -60 41 09.975263028   13.73 13.38     ~ 1 0
38 HD 126808 * 14 30 03.6001596432 -60 50 58.664849136   10.03 8.81     K1/2III 19 0
39 NGC 5617 285 * 14 30 06.1295968392 -60 43 16.869064512   13.53 13.14     ~ 4 0
40 Cl* Trumpler 22 HAUG 49 * 14 30 28.5684218496 -61 12 39.209377320   12.51 10.90 10.16 9.49 ~ 5 0
41 [DCD2015] 1417 * 14 30 46.5948869400 -61 10 03.666881928   15.12 13.66     ~ 1 0
42 [DCD2015] 1404 * 14 30 46.9904003184 -61 07 24.183803676   13.29 12.28     ~ 1 0
43 [DCD2015] 1381 * 14 30 48.3492340488 -61 06 28.012950216   15.18 13.84     ~ 1 0
44 [DCD2015] 1363 * 14 30 49.4120321784 -61 08 29.323762980   14 13.60     ~ 4 0
45 [DCD2015] 1327 * 14 30 52.4402104512 -61 07 11.069306148   14.81 14.00     ~ 1 0
46 [DCD2015] 1315 * 14 30 53.2254085584 -61 12 35.964958896   14.27 13.83     ~ 2 0
47 TYC 9006-335-1 * 14 30 58.0909107816 -61 13 07.223790612   12.14 11.72     ~ 4 0
48 [DCD2015] 1222 * 14 30 58.4462271552 -61 09 07.353677196   14.13 13.74     ~ 4 0
49 [DCD2015] 1188 * 14 31 00.5289440880 -61 11 44.369416788   13.64 13.24     ~ 4 0
50 [DCD2015] 1145 * 14 31 02.3417081400 -61 06 30.479412024   13.91 13.45     ~ 1 0
51 [DCD2015] 1136 * 14 31 03.060 -61 03 28.81   14.2 13.69     ~ 1 0
52 TYC 9006-4549-1 * 14 31 03.7715723256 -61 13 38.148250116   12.56 12.18     ~ 5 0
53 [DCD2015] 1085 HV* 14 31 05.4037239648 -61 10 04.289446956   13.14 12.47     ~ 3 0
54 [DCD2015] 1079 * 14 31 05.7628261992 -61 07 29.260233192   13.83 13.38     ~ 1 0
55 TYC 9006-2261-1 * 14 31 07.1932194720 -61 08 32.148665448   12.25 11.86     ~ 4 0
56 [DCD2015] 1026 * 14 31 08.8872516888 -61 13 09.450471576   13.52 13.07     ~ 3 0
57 Cl* Trumpler 22 HAUG 11 * 14 31 09.2669022216 -61 09 43.529232384   12 10.70     ~ 1 0
58 Cl Trumpler 22 OpC 14 31 09.5 -61 10 33           ~ 67 0
59 [DCD2015] 989 * 14 31 10.6025998032 -61 05 41.306320536   13.59 13.04     ~ 1 0
60 [DCD2015] 983 * 14 31 11.1552668664 -61 09 11.986249968   13.06 12.69     ~ 3 0
61 [DCD2015] 911 * 14 31 15.7158152928 -61 07 22.173696300   14.13 13.63     ~ 1 0
62 [DCD2015] 838 * 14 31 20.1985929864 -61 10 15.632371236   13.92 13.48     ~ 1 0
63 [DCD2015] 799 SB* 14 31 22.1450663784 -61 05 24.853455564   14.05 12.40     ~ 2 0
64 [DCD2015] 794 * 14 31 23.2610967696 -61 11 25.277524296   13.96 13.52     ~ 4 0
65 Cl* Trumpler 22 HAUG 32 * 14 31 29.6522041128 -61 09 27.574775172   12.07 10.50     ~ 3 0
66 NGC 5716 EmG 14 41 05.515 -17 28 36.91   13.0   16.43 12.6 ~ 37 1
67 PG 1633+099 HS* 16 35 24.0241690848 +09 47 49.891209036 13.215 14.205 14.396 14.481 14.609 sdB 113 0
68 [L92b] Mark A HS* 20 43 59.2253596272 -10 47 41.696051820 11.854 13.010 13.256 13.370 13.494 sdO 75 1
69 NGC 7031 OpC 21 07 12.9 +50 52 07   10.01 9.1     ~ 65 1
70 NGC 7086 OpC 21 30 30.6 +51 35 37   9.25 8.4     ~ 93 1

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