2010A&A...521A..42C

Query : 2010A&A...521A..42C

2010A&A...521A..42C - Astronomy and Astrophysics, volume 521A42-42 (2010/10-1)

Towards a census of the Galactic anticentre star clusters: colour-magnitude diagram and structural analyses of a sample of 50 objects.

CAMARGO D., BONATTO C. and BICA E.

Abstract (from CDS):

In this work we investigate the nature of 50 overdensities from the catalogue of Froebrich, Scholz, and Raftery (FSR) projected towards the Galactic anticentre, in the sector 160°≤l≤200°. The sample contains candidates with |b|≤20° classified by FSR as probable open cluster (OC) and labelled with quality flags 2 and 3. Our main purpose is to determine the nature of these OC candidates and the fraction of these objects that are unknown OCs, as well as to derive astrophysical parameters (age, reddening, distance, core and cluster radii) for the clusters and to investigate the relationship among parameters. The analysis is based on 2MASS J, (J-H), and (J-Ks) colour-magnitude diagrams (CMDs), and stellar radial density profiles (RDPs) built with decontamination tools. The tools are a field star decontamination algorithm, used to uncover the cluster's intrinsic CMD morphology, and colour-magnitude filters to isolate stars with a high probability of being cluster members. Out of the 50 objects, 16 (32%) are star clusters. We show that 9 (18%) overdensities are new OCs (FSR 735, FSR 807, FSR 812, FSR 826, FSR 852, FSR 904, FSR 941, FSR 953, and FSR 955) and 7 (14%) are previously studied or catalogued OCs (KKC1, FSR 795, Cz 22, FSR 828, FSR 856, Cz 24, and NGC 2234). These are OCs with ages in the range 5Myr to 1Gyr, at distances from the Sun 1.28≲d☉(kpc)≲5.78 and Galactocentric distances 8.5≲RGC(kpc)≲12.9. We also derive parameters for the previously analysed OCs Cz 22 and NGC 2234. Five (10%) candidates are classified as uncertain cases, and the remaining objects are probable field fluctuations.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - Galaxy: stellar content - Galaxy: structure

Simbad objects: 78

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Number of rows : 78
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 NGC 381 OpC 01 08 23.3 +61 34 39           ~ 76 0
3 Cl Czernik 6 OpC 02 02 08.4 +62 50 23           ~ 38 0
4 Cl Berkeley 63 OpC 02 19 27.5 +63 43 05           ~ 27 0
5 [FSR2007] 0714 Cl* 04 42 46.0 +41 55 19           ~ 8 0
6 [FSR2007] 0719 OpC 04 44 19.0 +41 48 51           ~ 8 0
7 [FSR2007] 0723 Cl* 04 44 57.0 +41 30 45           ~ 7 0
8 [FSR2007] 0733 OpC 04 45 08.0 +39 46 32           ~ 10 0
9 [FSR2007] 0717 OpC 04 46 06.0 +42 08 03           ~ 11 0
10 [FSR2007] 0721 OpC 04 46 21.0 +41 57 07           ~ 8 0
11 [FSR2007] 0735 OpC 04 53 54.0 +40 51 45           ~ 26 0
12 [FSR2007] 0753 OpC 05 02 14.0 +36 47 24           ~ 7 0
13 [FSR2007] 0732 Cl* 05 02 40 +42 32.4           ~ 7 0
14 [FSR2007] 0778 Cl* 05 14 20.0 +32 47 43           ~ 2 0
15 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
16 [FSR2007] 0775 OpC 05 25 35.0 +34 57 27           ~ 13 0
17 NGC 1931 OpC 05 31 23 +34 14.0     10.1     ~ 136 0
18 IPHAS J053619.58+314353.6 * 05 36 19.58 +31 43 52.6           ~ 1 0
19 IPHAS J053619.82+314356.2 * 05 36 19.82 +31 43 56.2           ~ 1 0
20 IPHAS J053631.98+314939.6 * 05 36 31.98 +31 49 39.6           ~ 1 0
21 IPHAS J053635.21+315003.0 Em* 05 36 35.2055343394 +31 50 02.926630202           ~ 2 0
22 [FSR2007] 0807 OpC 05 36 39.0 +31 49 20           ~ 15 0
23 ZTF J053641.45+314627.9 RS* 05 36 41.45 +31 46 27.9           ~ 3 0
24 [FSR2007] 0814 OpC 05 36 51.4 +31 13 12           ~ 38 0
25 [FSR2007] 0815 OpC 05 37 42.0 +31 19 27           ~ 6 0
26 [FSR2007] 0812 OpC 05 38 11.0 +31 44 03           ~ 11 0
27 IRAS 05351+3138 PN? 05 38 17.8766461872 +31 39 34.791880968           ~ 4 0
28 NAME S235 East1 Cl* 05 41 29.550 +35 49 21.65           ~ 9 0
29 [FSR2007] 0821 OpC 05 41 53.0 +29 54 17           ~ 15 0
30 [FSR2007] 0826 OpC 05 43 07.7 +28 59 06           ~ 26 0
31 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
32 [FSR2007] 0795 OpC 05 47 27.0 +35 25 31           ~ 27 0
33 Cl Basel 4 OpC 05 48 57.9 +30 11 20   9.56 9.1     ~ 42 0
34 [FSR2007] 0828 OpC 05 52 18.7 +29 53 36           ~ 29 0
35 [FSR2007] 0852 OpC 05 53 26.0 +25 11 00           ~ 26 0
36 Cl Czernik 24 OpC 05 55 23.6 +20 52 27           ~ 46 0
37 [FSR2007] 0928 Cl* 06 04 20.0 +15 24 50           ~ 4 0
38 [FSR2007] 0883 OpC 06 04 22.0 +22 02 30           ~ 24 0
39 [FSR2007] 0921 OpC 06 05 10.8 +16 41 40           ~ 17 0
40 [FSR2007] 0933 OpC 06 05 37.0 +14 32 07           ~ 6 0
41 [FSR2007] 0900 OpC 06 06 30.0 +19 13 59           ~ 7 0
42 [FSR2007] 0904 OpC 06 07 01.0 +19 00 52           ~ 30 0
43 [FSR2007] 0903 OpC 06 07 34.0 +19 06 46           ~ 9 0
44 [FSR2007] 0906 OpC 06 07 44.0 +18 47 26           ~ 7 0
45 [KGZ2008] 53 OpC 06 08 54.8 +26 15 55           ~ 24 0
46 [FSR2007] 0856 OpC 06 08 55.0 +26 15 59           ~ 7 0
47 [FSR2007] 0858 OpC 06 09 09.0 +25 40 38           ~ 8 0
48 [FSR2007] 0960 OpC 06 09 53.0 +12 20 02           ~ 5 0
49 [FSR2007] 0952 OpC 06 10 15.0 +13 00 47           ~ 9 0
50 [FSR2007] 0939 OpC 06 10 57.0 +14 22 57           ~ 9 0
51 [FSR2007] 0924 OpC 06 11 26.0 +16 50 13           ~ 8 0
52 UBC 201 OpC 06 13 22.7 +15 56 25           ~ 12 0
53 [FSR2007] 0937 OpC 06 13 45.3 +14 58 26           ~ 19 0
54 [FSR2007] 0940 OpC 06 14 16.0 +14 48 18           ~ 8 0
55 [FSR2007] 0909 OpC 06 15 46.0 +19 00 49           ~ 9 0
56 [FSR2007] 0891 Cl* 06 17 29.0 +22 25 38           ~ 9 0
57 [FSR2007] 0902 OpC 06 18 19.0 +20 31 42           ~ 10 0
58 [FSR2007] 0953 OpC 06 19 02.9 +14 09 00           ~ 28 0
59 [FSR2007] 0941 OpC 06 21 47.3 +15 46 09           ~ 29 0
60 [FSR2007] 0951 OpC 06 22 17.9 +14 37 54           ~ 38 0
61 [FSR2007] 0962 OpC 06 23 50.0 +14 05 10           ~ 6 0
62 [FSR2007] 0955 OpC 06 23 52.0 +14 30 26           ~ 8 0
63 [FSR2007] 0948 OpC 06 25 56.7 +15 51 35           ~ 24 0
64 [FSR2007] 0936 OpC 06 28 31.0 +16 55 36           ~ 5 0
65 NGC 2234 OpC 06 29 20 +16 45.5           ~ 16 0
66 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
67 [FSR2007] 0975 OpC 06 40 00.0 +13 17 58           ~ 15 0
68 Cl Pismis 5 OpC 08 37 37.1 -39 35 23           ~ 48 0
69 NGC 3960 OpC 11 50 36.4 -55 40 40   9.07 8.3     ~ 152 0
70 NGC 4755 OpC 12 53 39.2 -60 22 07           ~ 300 0
71 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
72 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
73 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1
74 Cl Ruprecht 141 OpC 18 31 18 -12 19.0           ~ 23 0
75 NGC 6823 OpC 19 43 11.3 +23 18 32   7.71 7.1     ~ 279 2
76 NAME Cyg Arm PoG 20 02 +40.0           ~ 163 0
77 [FSR2007] 0198 OpC 20 02 24.4 +35 39 54           ~ 30 0
78 NAME Outer Arm PoG 21 48 +69.4           ~ 370 0

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