2006A&A...453..517T

Query : 2006A&A...453..517T

2006A&A...453..517T - Astronomy and Astrophysics, volume 453, 517-524 (2006/7-2)

VLT/NACO near-infrared imaging and spectroscopy of N159A in the LMC HII complex N159.

TESTOR G., LEMAIRE J.L., FIELD D. and DIANA S.

Abstract (from CDS):

We present near-infrared imaging and spectrocopic observations of the HII region N159A (∼10pc) in the giant star-forming region N159 (50pc) in the LMC. N159A was observed in the J and Ks bands at high spatial resolution ∼0.2" using the ESO Very Large Telescope UT4 (VLT), equipped with the NAOS adaptative optics system. Our data reveal the morphology of this region in unprecedented detail. The protostar P2, one of the first YSOs of Class I identified in the LMC is now resolved in two YSO candidates. The ultracompact HII region LI-LMC 1501W is found to be a tight cluster embedded in a compact HII region ionised by a late O source. A new multiple system composed of a tight star cluster and an YSO candidate, all embedded in a compact nebular region (0.4pc) is also detected at the north-east edge of N159A. The stellar population of the whole N159A region appears composed of two main stellar populations, one with an age ≤3Myr and the other one with a large range of age (300Myr-10Gyr). Using spectroscopy, one of the two exciting O stars in the HII region N159A is classified O5-O6.

Abstract Copyright: ∼

Journal keyword(s): galaxies: Magellanic Clouds - ISM: individual objects: N159A - stars: formation - stars: pre-main sequence - HII regions

VizieR on-line data: <Available at CDS (J/A+A/453/517): table3.dat>

Nomenclature: Fig.1, Table 5: [HW94] N (Nos 6, 7) added. Tables 3, 5: [TLF2006] NNNa N=136+2 among (Nos 4-181, 121a, 123a).

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

CDS comments: Fig.1, Table 5: 'N159A5' to 'N159A7' = [HW94] 5 to 7 (not [HT82] objects).

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 - 2024 		#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7059 0
2 2MASS J04181893-6927346 * 04 18 18.9429767005 -69 27 34.817025027           ~ 12 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17424 0
4 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2018 2
5 LHA 120-N 158 HII 05 39 11.220 -69 30 13.65           ~ 87 0
6 LHA 120-N 159W MoC 05 39 32.510 -69 46 02.74           ~ 92 0
7 LI-LMC 1501 IR 05 39 34.6 -69 45 34           ~ 7 1
8 [DCL92] 240 * 05 39 36.23 -69 46 03.5   17.28 15.91     ~ 3 0
9 [JHS86] N159-59 * 05 39 36.6 -69 46 06           ~ 2 0
10 [IJC2004] B0540-6946(5) Rad 05 39 37.5 -69 46 10           ~ 3 0
11 AT20G J053937-694526 Rad 05 39 37.5 -69 45 26           ~ 11 1
12 [CC98] LI-LMC 1501 W * 05 39 37.60 -69 46 11.5           O7.5V 9 1
13 NGC 2079 Cl* 05 39 39.0 -69 46 24           ~ 64 0
14 [NKN2005] N159-Y2 Cl* 05 39 39.3 -69 46 08           ~ 3 0
15 [JWB2005] 16.2 * 05 39 40.08 -69 46 19.6   13.79 13.0     O8 3 0
16 [DCL92] 204 * 05 39 40.15 -69 46 19.9   13.45 12.56     O7 4 0
17 [DCL92] 205 * 05 39 40.23 -69 46 19.0   13.16 12.21     O5 4 0
18 NAME DD 13 * 05 39 40.3 -69 46 20   13.72 13.19     O 5 1
19 2MASS J05394188-6946122 Y*O 05 39 41.886 -69 46 12.21           O6.5V 19 1
20 [TLF2006] 123 * 05 39 41.900 -69 46 11.52           ~ 3 0
21 [TLF2006] 121 * 05 39 41.960 -69 46 11.99           ~ 3 0
22 [DCL92] 217 * 05 39 42.22 -69 46 13.3   14.96 14.09     B1V 3 0
23 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 276 2
24 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 119 1
25 [HW94] 2 Rad 05 39 52.1 -69 45 10           ~ 4 0
26 [HW94] 3 Rad 05 39 59.1 -69 45 16           ~ 4 0
27 2MASS J05395936-6945263 Y*O 05 39 59.363 -69 45 26.31           ~ 14 0
28 2MASS J05400074-6947129 Y*O 05 40 00.741 -69 47 12.91 14.808 15.690 15.072   14.336 ~ 32 0
29 LHA 120-N 159S MoC 05 40 03.750 -69 51 01.62           ~ 43 0
30 NAME N159 Blob in LMC HII 05 40 04.2 -69 44 43           ~ 38 0
31 [DMM94] J0540-697 Rad 05 40 04.49 -69 44 37.6           ~ 7 1
32 MACHO 76.9728.2933 * 05 40 05.4078687744 -69 44 44.185688916     16.93 16.07   ~ 18 0
33 LHA 120-N 159E MoC 05 40 10.980 -69 44 35.84           ~ 58 0

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