2009A&A...501..585P


Query : 2009A&A...501..585P

2009A&A...501..585P - Astronomy and Astrophysics, volume 501, 585-593 (2009/7-2)

Washington photometry of five star clusters in the Large Magellanic Cloud.

PIATTI A.E., GEISLER D., SARAJEDINI A. and GALLART C.

Abstract (from CDS):

We present CCD photometry in the Washington system C and T1 passbands down to T1∼22.5 in the fields of NGC1697, SL133, NGC1997, SL663, and OHSC28, five mostly unstudied star clusters in the LMC. Cluster radii were estimated from star counts in appropriate-sized boxes distributed throughout the entire observed fields. We perform a detailed analysis of the field star contamination and derive cluster colour-magnitude diagrams (CMDs). Based on the best fits of isochrones computed by the Padova group to the (T1, C-T1) CMDs, the δ(T1) index and the Standard Giant Branch procedure, we derive metallicities and ages for the five clusters. We combine our sample with clusters with ages and metallicities on a similar scale and examine relationships between position in the LMC, age and metallicity. With the exception of NGC1697 (age=0.7Gyr, [Fe/H]=0.0dex), the remaining four clusters are of intermediate-age (from 2.2 to 3.0Gyr) and relatively metal-poor ([Fe/H]=-0.7dex). The cluster and field age-metallicty realtions show evidence for a metallicity offset but do overlap, particularly on the upper envelope side of the cluster age-metallicity relation. We confirm previous results that clusters younger than ∼1Gyr were formed during an outside-in process; this occurred after a burst of cluster formation that took place mainly in the outer disk and peaked at ∼2Gyr ago.

Abstract Copyright:

Journal keyword(s): techniques: photometric - galaxies: individual: LMC - Magellanic Clouds - galaxies: star clusters - stars: Hertzsprung-Russell (HR) and C-M diagrams

VizieR on-line data: <Available at CDS (J/A+A/501/585): table2.dat table3.dat table4.dat table5.dat table6.dat>

Simbad objects: 58

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Number of rows : 58
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10268 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6328 1
3 NGC 1466 GlC 03 44 33 -71 40.3   11.6 11.59     ~ 160 0
4 KMHK 21 Cl* 04 37 51.550 -69 01 42.09   14.56 13.80     ~ 23 0
5 NGC 1841 GlC 04 45 23 -83 59.8   12.23 11.43     ~ 176 0
6 NGC 1697 Cl* 04 48 36.820 -68 33 30.64   13.15 12.62     ~ 14 0
7 NGC 1754 Cl* 04 54 18.080 -70 26 32.58   12.32 11.57     ~ 91 0
8 NGC 1766 Cl* 04 55 57.410 -70 13 26.21   12.33 12.22     ~ 11 0
9 ESO 85-21 Cl* 04 57 22.18 -62 32 08.2           ~ 20 0
10 KMHK 337 Cl* 04 57 34.420 -65 16 00.34   14.11 13.58     ~ 14 0
11 NGC 1786 Cl* 04 59 07.470 -67 44 45.44   10.1       ~ 139 0
12 NGC 1835 Cl* 05 05 09.210 -69 24 20.96   11.314 10.596     ~ 161 0
13 SOI 343 Cl* 05 05 24.7054660512 -68 30 04.098795732   13.022 12.969     A1Iab 27 0
14 NGC 1836 Cl* 05 05 35.830 -68 37 45.68   12.50 12.22     ~ 31 0
15 BRHT 4b Cl* 05 05 40.09 -68 38 11.9           ~ 21 0
16 NGC 1839 Cl* 05 06 03.2754947352 -68 37 37.209733320   11.90 11.80     ~ 39 0
17 NGC 1838 Cl* 05 06 08.630 -68 26 56.61   13.20 12.93     ~ 23 0
18 [SL63] 244 Cl* 05 07 37.540 -68 32 31.20   13.81 13.04     ~ 25 0
19 ESO 119-40 Cl* 05 09 21.67 -62 22 46.9   14.98 14.25     ~ 22 0
20 NGC 1860 Cl* 05 10 41.140 -68 45 12.61   11.18 11.04     ~ 36 0
21 NGC 1863 Cl* 05 11 40.240 -68 43 36.01           ~ 42 0
22 NGC 1865 Cl* 05 12 24.940 -68 46 19.21   13.60 12.91     ~ 30 0
23 NGC 1898 As* 05 16 45.380 -69 39 16.76   12.62 11.86     ~ 93 0
24 KMHK 727 Cl* 05 17 49 -68 28.4   14.35 13.74     ~ 16 0
25 ESO 85-72 Cl* 05 20 05.61 -63 28 49.2   14.58 13.85     ~ 27 0
26 NGC 1928 Cl* 05 20 55.940 -69 28 34.96   13.34 12.47     ~ 65 0
27 NGC 1939 Cl* 05 21 26.82 -69 56 59.0   12.52 11.83     ~ 58 0
28 NAME LMC Bar ? 05 22 08 -69 23.5           ~ 284 0
29 IC 2134 Cl* 05 23 06 -75 26.8   14.73 13.94     ~ 19 0
30 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16076 1
31 KMHK 883 Cl* 05 24 13 -75 34.0   15.00 14.20     ~ 17 0
32 KMHK 861 Cl* 05 24 32.080 -67 40 36.11           ~ 14 0
33 KMHK 960 Cl* 05 28 48.930 -71 38 01.39   13.87 13.14     ~ 20 0
34 ESO 85-91 Cl* 05 29 48.11 -63 38 59.2   13.96 13.23     ~ 24 0
35 KMHK 996 OpC 05 29 54.370 -72 03 17.97           ~ 15 0
36 ESO 85-92 Cl* 05 30 08.17 -63 25 36.7   14.34 13.75     ~ 12 0
37 NGC 1997 Cl* 05 30 34.44 -63 12 17.2   14.27 13.43     ~ 20 0
38 KMHK 1035 Cl* 05 31 23.760 -72 02 27.74           ~ 12 0
39 KMHK 1046 Cl* 05 31 42.940 -72 08 49.41   13.83 13.06     ~ 20 0
40 KMHK 1013 Cl* 05 32 03 -64 14.5   14.37 13.61     ~ 16 0
41 ESO 86-22 Cl* 05 42 29.090 -65 21 46.33     13.8     ~ 42 0
42 ESO 86-26 Cl* 05 43 20 -66 15.7   14.00 13.33     ~ 20 0
43 KMHK 1283 Cl* 05 43 35.930 -66 12 26.88   14.90 14.30     ~ 17 0
44 NGC 2121 Cl* 05 48 13.190 -71 28 52.00   13.21 12.37     ~ 124 0
45 KMHK 1499 Cl* 05 53 24.200 -70 04 11.92   13.86 13.18     ~ 20 0
46 OHSC 28 Cl* 05 55 35.28 -62 20 42.9           ~ 9 0
47 NGC 2155 Cl* 05 58 32.070 -65 28 38.62   13.41 12.60     ~ 100 0
48 KMHK 1588 Cl* 06 00 37.970 -70 04 14.31   14.90 14.18     ~ 21 0
49 ESO 121-3 Cl* 06 02 03.32 -60 31 25.6   14.91 14.04     ~ 108 0
50 ESO 86-61 Cl* 06 08 15 -62 59.3   14.94 14.15     ~ 36 0
51 NGC 2209 GlC 06 08 34 -73 50.5   13.58 13.15     ~ 110 0
52 NGC 2210 GlC 06 11 31.296 -69 07 17.04   10.9 10.94     ~ 179 0
53 ESO 57-75 Cl* 06 13 27.3 -70 41 42   14.41 13.67     ~ 39 0
54 NAME Hodge 11 GlC 06 14 22.92 -69 50 54.9   12.57 11.93     ~ 106 0
55 KMHK 1714 Cl* 06 15 17 -73 47.1           ~ 18 0
56 KMHK 1758 Cl* 06 29 58 -69 20.0           ~ 17 0
57 NGC 2257 Cl* 06 30 12 -64 19.6   13.24 12.62     ~ 209 0
58 KMHK 1762 Cl* 07 07 39 -69 59.0           ~ 19 0

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2022.07.07-12:53:18

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