2014MNRAS.441L..36C

Query : 2014MNRAS.441L..36C

2014MNRAS.441L..36C - Mon. Not. R. Astron. Soc., 441, L36-L40 (2014/June-2)

NGC 4337: an overlooked old cluster in the inner disc of the Milky Way.

CARRARO G., GIORGI E.E., COSTA E. and VAZQUEZ R.A.

Abstract (from CDS):

Galactic open clusters do not survive long in the high-density regions of the inner Galactic disc. Inside the solar ring only 11 open clusters are known with ages older than 1Gyr. We show here, basing on deep, high-quality photometry, that NGC 4337, contrary to earlier findings, is indeed an old open cluster. The cluster is located very close to the conspicuous star cluster Trumpler 20, as well misclassified in the past, and that has received so much attention in recent years. NGC 4337 shows a significant clump of He-burning stars which was not detected previously. Its beautiful colour-magnitude diagram is strikingly similar to the one of the classical old open clusters IC 4651, NGC 752, and NGC 3680, and this suggests similar age and composition. A spectroscopic study is much needed to confirm our findings. This, in turn, would also allow us to better define the inner disc radial abundance gradient and its temporal evolution. To this aim, a list of clump star candidates is provided.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): open clusters and associations: general - open clusters and associations: individual: NGC 4337

VizieR on-line data: <Available at CDS (J/MNRAS/441/L36): table2.dat>

Nomenclature: Table 2: [CGC2014] NNNN (Nos 1-8197).

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

Simbad objects: 33

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Number of rows : 33
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 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
2 SA 98- reg 06 52 04.1 -00 23 58           ~ 179 0
3 NGC 3680 OpC 11 25 19.8 -43 14 38   8.40 7.6     ~ 340 0
4 CPD-57 5439 * 12 23 48.2710835184 -58 05 06.901573992   11.51 10.85     ~ 2 0
5 NGC 4337 14 * 12 23 56.1121890936 -58 06 37.849797720   14.88 13.69 13.60   ~ 11 0
6 NGC 4337 13 * 12 24 01.0227127008 -58 07 55.535656548   13.43 11.86     ~ 14 0
7 CPD-57 5441 * 12 24 02.4598596840 -58 05 00.962321496   11.68 10.93     ~ 2 0
8 NGC 4337 OpC 12 24 04.8 -58 07 28   9.44 8.9     ~ 66 0
9 NGC 4337 4 * 12 24 06.1050519336 -58 03 48.288013020   12.23 11.53     ~ 2 0
10 NGC 4337 12 * 12 24 08.1436568568 -58 07 52.615360740   14.19 13.02     ~ 2 0
11 NGC 4337 11 * 12 24 08.3636177472 -58 08 33.723569076   12.34 12.16     ~ 4 0
12 NGC 4337 5 * 12 24 12.5964456624 -58 02 59.680834548   12.75 12.52     ~ 2 0
13 NGC 4337 15 BS* 12 24 13.6847339928 -58 07 12.258598872   13.73 13.29 13.32   ~ 6 0
14 NGC 4337 7 * 12 24 19.2281737896 -58 08 33.068014368   12.38 11.91     ~ 2 0
15 NGC 4337 8 * 12 24 19.4514966408 -58 02 25.906344360   13.50 12.98     ~ 2 0
16 NGC 4337 16 * 12 24 24.7169746320 -58 06 02.123180460   14.30 13.60     ~ 2 0
17 NGC 4337 10 * 12 24 26.9300970696 -58 08 08.315986992   13.93 13.42     ~ 2 0
18 NGC 4337 6 * 12 24 32.6172192240 -58 07 46.421224212   12.64 12.23     ~ 2 0
19 NGC 4337 9 * 12 24 37.0166434536 -58 06 57.914669448   14.14 13.66     ~ 2 0
20 HD 107976B * 12 24 49.1618532816 -58 07 06.115008972   8.38 7.93 7.72   A 2 0
21 HD 107976A SB* 12 24 49.4570408761 -58 07 10.889977866   8.71 7.73 8.27   F8/G2IV/V 30 0
22 Cl Collinder 261 OpC 12 38 04.7 -68 22 40     10.7     ~ 216 0
23 Cl Trumpler 20 OpC 12 39 33.0 -60 38 10           ~ 138 0
24 NGC 6005 OpC 15 55 49.2 -57 26 23   11.90 10.7     ~ 72 0
25 NGC 6253 OpC 16 59 06.4 -52 42 39     10.2     ~ 209 0
26 IC 4651 OpC 17 24 48.5 -49 55 23           ~ 374 0
27 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
28 NGC 6583 OpC 18 15 51.0 -22 08 38     10.0     ~ 83 0
29 Cl Berkeley 44 OpC 19 17 15.4 +19 32 55           ~ 60 0
30 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
31 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
32 Cl Berkeley 52 OpC 20 14 29.0 +28 56 49           ~ 15 0
33 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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