2003A&A...400..923H

Query : 2003A&A...400..923H

2003A&A...400..923H - Astronomy and Astrophysics, volume 400923-937 (2003/3-4)

Tight LMC massive star clusters R127 and R128.

HEYDARI-MALAYERI M., MEYNADIER F. and WALBORN N.R.

Abstract (from CDS):

We study the Large Magellanic Cloud (LMC) star clusters R127 and R128 using imaging and spectroscopy obtained at the ESO NTT telescope. An advanced image restoration technique allows us to resolve these two clusters into at least 14 and 33 stars respectively and obtain their photometry. In particular, we show that the core of R127 is composed of at least four stars and identify the Luminous Blue Variable (LBV) component. The closest neighbor of the LBV (star #8) is 1.5" away. Moreover, from medium dispersion spectroscopy we determine the spectral types for 19 stars in and near both clusters, and in particular present the first spatially resolved observation of the second brightest component of the R127 cluster (star #3) situated 3.3" from the LBV. By comparing with evolutionary models we also look into the stellar ages. The oldest stars of the cluster are ∼6-8Myr old, whereas the most massive star of the region (#7), formed ∼3Myr ago as an 80M☉ star, has turned into an LBV, the ``R127'' star.

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Journal keyword(s): stars: early-type - ISM: individual objects: R127, R128 - galaxies: Magellanic Clouds

Nomenclature: Tables 1, 2, 3: [HMW2003] NNN (Nos 1-47) and N=31 among (Nos 61-291).

Simbad objects: 87

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Number of rows : 87
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 LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
2 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
3 DEM L 248 HII 05 36 09.8 -69 31 54           ~ 13 0
4 [HMW2003] 284 * 05 36 30.9997 -69 30 53.009           B1.5 2 0
5 2MASS J05363433-6930411 * 05 36 34.3082417784 -69 30 41.156000676 14.286 15.062 14.996   15.192 B0III 3 0
6 CPD-69 423 * 05 36 37.1525870976 -69 29 19.257945612 10.897 11.86 11.97   12.186 OB 5 0
7 2MASS J05363780-6929140 Pu* 05 36 37.7700905016 -69 29 13.891537752           ~ 1 0
8 [HMW2003] 65 * 05 36 37.8 -69 30 14           ~ 1 0
9 [HMW2003] 69 * 05 36 37.8 -69 29 41           ~ 1 0
10 CPD-69 425 * 05 36 37.8213582984 -69 29 33.787507164   11.89 12.00     OB 5 0
11 [HMW2003] 97 * 05 36 39.9 -69 30 07           ~ 1 0
12 [HMW2003] 100 * 05 36 40.0 -69 29 32           ~ 1 0
13 [HMW2003] 109 * 05 36 40.6 -69 30 10           ~ 1 0
14 [HMW2003] 112 * 05 36 40.8 -69 29 30           ~ 1 0
15 MACHO 81.9126.11 * 05 36 40.8429184344 -69 29 53.257421616 13.137 13.985 13.912 10.30 14.199 O9.7II 4 0
16 [HMW2003] 1 * 05 36 42.8 -69 29 58           ~ 1 0
17 OGLE LMC-ECL-20547 EB* 05 36 43.01 -69 29 56.3     15.942   16.100 ~ 4 0
18 [HMW2003] 3 * 05 36 43.2202452720 -69 29 45.666182544           ~ 4 1
19 [HMW2003] 4 * 05 36 43.4 -69 29 56           ~ 1 0
20 [HMW2003] 5 * 05 36 43.5 -69 29 55           ~ 1 0
21 [HMW2003] 6 * 05 36 43.6 -69 29 52           ~ 1 0
22 HD 269858 s*b 05 36 43.6936418088 -69 29 47.451149232   10.24 10.15 9.95 9.05 LBV 296 2
23 NAME HMW1 Cl* 05 36 43.7 -69 29 48           ~ 6 1
24 [HMW2003] 7 * 05 36 43.7 -69 29 47           A 1 0
25 [HMW2003] 8 * 05 36 43.8 -69 29 46           ~ 2 0
26 [HMW2003] 160 * 05 36 43.9 -69 30 02           ~ 1 0
27 [HMW2003] 9 * 05 36 43.9 -69 29 51           ~ 1 0
28 [HMW2003] 159 * 05 36 43.9 -69 29 10           ~ 1 0
29 NGC 2055 As* 05 36 44 -69 29.9   8.51 8.39     ~ 26 0
30 [HMW2003] 10 * 05 36 44.0 -69 29 44           ~ 1 0
31 2MASS J05364402-6929274 * 05 36 44.02 -69 29 27.4           ~ 1 0
32 [HMW2003] 162 * 05 36 44.1 -69 30 05           ~ 1 0
33 [HMW2003] 12 * 05 36 44.6 -69 29 52           ~ 1 0
34 [HMW2003] 11 * 05 36 44.6 -69 29 50           ~ 1 0
35 [HMW2003] 13 * 05 36 44.6 -69 29 46           ~ 1 0
36 [HMW2003] 14 * 05 36 44.8 -69 29 57           ~ 1 0
37 [HMW2003] 15 * 05 36 45.7 -69 29 55           ~ 1 0
38 [HMW2003] 16 * 05 36 45.8680331448 -69 29 58.725265992           O9.7II 2 0
39 [HMW2003] 17 * 05 36 45.9 -69 30 01           ~ 1 0
40 [HMW2003] 18 * 05 36 46.3 -69 30 00           ~ 1 0
41 [HMW2003] 20 * 05 36 46.3 -69 29 57           ~ 1 0
42 [HMW2003] 19 * 05 36 46.3 -69 29 53           ~ 1 0
43 [HMW2003] 21 * 05 36 46.4 -69 30 03           ~ 1 0
44 2MASS J05364651-6929561 * 05 36 46.4733901560 -69 29 55.958604432 12.045 12.528 12.486   13.115 O8.5II 2 0
45 [HMW2003] 23 * 05 36 46.4996 -69 30 04.395           O9Ib 2 0
46 [HMW2003] 26 * 05 36 46.4996 -69 30 02.802           O9.7II 2 0
47 [HMW2003] 22 * 05 36 46.4996 -69 30 01.099           O9III 2 0
48 [HMW2003] 27 * 05 36 46.5 -69 29 52           ~ 1 0
49 [HMW2003] 25 * 05 36 46.5 -69 29 35           ~ 1 0
50 [HMW2003] 28 * 05 36 46.6992 -69 29 59.780           O9.5III 2 0
51 [HMW2003] 29 * 05 36 46.7 -69 30 01           ~ 1 0
52 [HMW2003] 30 * 05 36 46.8 -69 30 04           ~ 1 0
53 [HMW2003] 31 * 05 36 46.8 -69 29 59           ~ 1 0
54 [HMW2003] 211 * 05 36 46.8 -69 29 14           ~ 1 0
55 [HMW2003] 32 * 05 36 46.9006 -69 29 57.693           O9.5III 2 0
56 [HMW2003] 33 * 05 36 47.0 -69 30 00           ~ 1 0
57 NAME HMW2 Cl* 05 36 47 -69 30.0           ~ 3 1
58 [HMW2003] 34 * 05 36 47.0 -69 29 49           ~ 1 0
59 [HMW2003] 36 * 05 36 47.1 -69 29 56           ~ 1 0
60 [HMW2003] 35 * 05 36 47.1002 -69 29 59.286           B0III 2 0
61 HD 269859 s*b 05 36 47.1875018688 -69 29 52.090414152 9.940 10.761 10.730 11.06   B1Ia 56 1
62 [HMW2003] 217 * 05 36 47.2 -69 30 29           ~ 1 0
63 [HMW2003] 38 * 05 36 47.2 -69 30 04           ~ 1 0
64 [HMW2003] 219 * 05 36 47.4 -69 30 27           ~ 1 0
65 [HMW2003] 40 * 05 36 47.4 -69 30 01           ~ 1 0
66 [HMW2003] 41 * 05 36 47.4 -69 30 00           ~ 1 0
67 [HMW2003] 39 * 05 36 47.4005 -69 29 57.995           B0III 2 0
68 [HMW2003] 222 * 05 36 47.5 -69 30 09           ~ 1 0
69 [HMW2003] 42 * 05 36 47.7 -69 29 58           ~ 1 0
70 [HMW2003] 43 * 05 36 47.7 -69 29 52           ~ 1 0
71 [HMW2003] 44 * 05 36 47.9 -69 30 00           ~ 1 0
72 2MASS J05364802-6929559 * 05 36 48.0265890648 -69 29 55.898795364 12.330 13.163 13.166   13.433 O9.2III 4 0
73 [HMW2003] 46 * 05 36 48.1 -69 29 51           ~ 1 0
74 [HMW2003] 47 * 05 36 48.2 -69 29 54           ~ 1 0
75 2MASS J05364925-6929313 * 05 36 49.2901399608 -69 29 31.206141564           ~ 1 0
76 [HMW2003] 265 * 05 36 50.6 -69 29 57           ~ 1 0
77 2MASS J05365085-6930164 * 05 36 50.8475171832 -69 30 16.349474988           ~ 1 0
78 [HMW2003] 285 * 05 36 51.8 -69 30 24           ~ 1 0
79 OGLE LMC-ECL-20620 EB* 05 36 52.6336544784 -69 30 22.059262692     15.733   15.865 ~ 4 0
80 2MASS J05365319-6928420 * 05 36 53.1848298600 -69 28 41.997668916           ~ 1 0
81 2MASS J05365319-6929058 * 05 36 53.2023860952 -69 29 05.683350624           ~ 1 0
82 2MASS J05365389-6930224 * 05 36 53.8616343072 -69 30 22.294502388           ~ 1 0
83 OGLE LMC-ECL-20629 EB* 05 36 54.1303186320 -69 28 59.059394400     14.022 14.123 14.026 ~ 6 0
84 [HMW2003] 291 * 05 36 54.3 -69 28 44           ~ 1 0
85 [HMW2003] 281 * 05 36 56.8053678600 -69 29 27.611155068 14.541 15.427 15.511   15.852 O9.7: 3 0
86 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
87 LHA 120-N 158 HII 05 39 11.220 -69 30 13.65           ~ 93 0

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