2006MNRAS.372.1509O


Query : 2006MNRAS.372.1509O

2006MNRAS.372.1509O - Mon. Not. R. Astron. Soc., 372, 1509-1524 (2006/November-2)

Massive young stellar objects in the Large Magellanic Cloud: water masers and ESO-VLT 3-4 µm spectroscopy.

OLIVEIRA J.M., VAN LOON J.T., STANIMIROVIC S. and ZIJLSTRA A.A.

Abstract (from CDS):

We investigate the conditions of star formation in the Large Magellanic Cloud (LMC). We have conducted a survey for water maser emission arising from massive young stellar objects in the 30 Doradus region (N157) and several other Hii regions in the LMC (N105A, N113 and N160A). We have identified a new maser source in 30Dor at the systemic velocity of the LMC. We have obtained 3-4 µm spectra, with the European Southern Observatory (ESO)-Very Large Telescope (VLT), of two candidate young stellar objects. N105AIRS1 shows H recombination line emission, and its Spectral Energy Distribution (SED) and mid-infrared colours are consistent with a massive young star ionizing the molecular cloud. N157BIRS1 is identified as an embedded young object, based on its SED and a tentative detection of water ice. The data on these four Hii regions are combined with mid-infrared archival images from the Spitzer Space Telescope to study the location and nature of the embedded massive young stellar objects and signatures of stellar feedback. Our analysis of 30Dor, N113 and N160A confirms the picture that the feedback from the massive O- and B-type stars, which creates the Hii regions, also triggers further star formation on the interfaces of the ionized gas and the surrounding molecular cloud. Although in the dense cloud N105A star formation seems to occur without evidence of massive star feedback, the general conditions in the LMC seem favourable for sequential star formation as a result of feedback. In an Appendix, we present water maser observations of the galactic red giants RDoradus and WHydrae.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): masers - stars: formation - stars: pre-main-sequence - Hii regions - Magellanic Clouds - infrared: stars

Nomenclature: Fig.6, Table 3: [OVS2006] N157B IRS N (Nos 1-2), [OVS2006] N157B SN (Nos S1-S4), [OVS2006] N105A IRS N (Nos 1-2), [OVS2006] N105A SN (Nos S1-S9), [OVS2006] N105A Blob A (Nos A-B).

Simbad objects: 67

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Number of rows : 67
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LHA 115-S 7 s*y 00 47 08.7002390683 -73 14 11.905170101 12.96 13.61 12.94   11.79 G6.5Ia-Iab 14 0
2 LHA 115-S 9 Em* 00 48 23.3130643381 -72 43 49.083282904   13.907 13.963   13.757 B1e 11 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9932 1
4 SNR B0057-72.2 SNR 00 59 27.40 -72 10 10.7   12.37 12.57     ~ 223 0
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6037 1
6 * tet Ret ** 04 17 40.27197 -63 15 19.4619           ~ 12 0
7 V* R Dor AB* 04 36 45.59127 -62 04 37.7974 7.84 6.98 5.40 2.71 -0.44 M8III:e 307 0
8 NGC 1763 As* 04 56 51.5 -66 24 25     9.40     ~ 158 3
9 LHA 120-N 105A HII 05 09 34.3 -68 53 45           ~ 50 1
10 MACHO 79.4780.77 * 05 09 45.594 -68 53 19.17     16.89 16.08   ~ 3 0
11 MACHO 79.4780.7 * 05 09 47.4499514602 -68 53 36.263167813     14.45 13.60   ~ 2 0
12 [OVS2006] N105A S3 * 05 09 48.4 -68 52 51           ~ 1 0
13 [OVS2006] N105A S4 * 05 09 48.5 -68 52 44           ~ 1 0
14 [OVS2006] N105A S5 * 05 09 49.1 -68 52 54           ~ 1 0
15 2MASS J05095030-6853345 * 05 09 50.30 -68 53 34.5           ~ 1 0
16 [WSI2008] 318 Y*O 05 09 50.547 -68 53 05.29           ~ 10 1
17 [OVS2006] N105A IRS 2 IR 05 09 52.0 -68 53 29           ~ 1 0
18 [OVS2006] N105A S7 * 05 09 52.1324703828 -68 53 19.273436069           ~ 1 0
19 [OVS2006] N105A BLob B IR 05 09 52.5 -68 53 02           ~ 1 0
20 [OVS2006] N105A BLob A IR 05 09 52.9 -68 53 01           ~ 1 0
21 Brey 16a WR* 05 09 53.7663260035 -68 52 52.474321846   14.12 13.93     WC5+O 17 0
22 [OVS2006] N105A S8 * 05 09 53.8 -68 52 53           ~ 1 0
23 MACHO 79.4780.150 * 05 09 55.570 -68 53 13.26     17.44 16.59   ~ 2 0
24 NGC 1858 Cl* 05 09 56.09 -68 54 06.2   9.76 9.88     ~ 78 3
25 LHA 120-N 105 EmO 05 09 57.1 -68 53 31           ~ 40 0
26 LHA 120-N 113C Cl* 05 13.2 -69 32           ~ 10 1
27 NGC 1874 Cl* 05 13 13.22 -69 22 30.3   12.47 12.81     ~ 25 0
28 LHA 120-N 113E EmO 05 13 17 -69 22.5           ~ 5 0
29 LWKHK c Mas 05 13 17.67 -69 22 21.4           ~ 3 1
30 LHA 120-N 113B EmO 05 13 20 -69 22.6           ~ 5 0
31 LHA 120-N 113 HII 05 13 21.7 -69 21 33           ~ 100 1
32 LHA 120-N 113A EmO 05 13 21.828 -69 22 38.90           ~ 11 0
33 LWKHK b Mas 05 13 25.21 -69 22 45.9           ~ 2 1
34 SV* HV 2377 LP? 05 13 32.9234989221 -69 21 42.380094903 15.780 14.53 13.085 11.56 10.712 K5-M3 12 0
35 NGC 1880 Cl* 05 13 38.90 -69 23 02.0           ~ 14 0
36 HD 269217 s*b 05 13 38.9188358563 -69 21 08.085451831 11.325 12.084 11.754 12.16 11.54 B5/6Ia[e] 69 0
37 HD 269219 Em* 05 13 41.9257292358 -69 20 05.693937290 9.86 10.80 10.87 11.09   OB 12 0
38 BSDL 945 ISM 05 13 50 -69 23.2           ~ 3 0
39 IC 2128 HII 05 23 01.0 -68 02 13     11.10     ~ 39 1
40 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15574 1
41 SNR J052501-693842 SNR 05 25 02.20 -69 38 39.0           ~ 364 1
42 2MASS J05323858-6825221 Y*O 05 32 38.588 -68 25 22.18           ~ 19 0
43 NGC 2032 HII 05 35 23.5 -67 34 56           ~ 72 1
44 LHA 120-N 157 HII 05 35 49 -69 12.6           ~ 47 0
45 NAME 30 Dor C Superbubble Rad 05 35 50.8 -69 12 22           ~ 43 1
46 OGLE LMC-LPV-75560 LP* 05 37 45.48 -69 11 09.5     17.913   15.391 ~ 3 0
47 [OVS2006] N157B S2 * 05 37 46.0 -69 11 15           ~ 1 0
48 2MASS J05374608-6910499 Y*O 05 37 46.085 -69 10 49.98           ~ 3 0
49 [M2002] LMC 169212 * 05 37 46.470 -69 11 17.00   15.26 14.8     F5V 3 0
50 [JGB98] 30 Dor-22 MoC 05 37 47.3 -69 11 00           ~ 2 0
51 LH 99 As* 05 37.8 -69 10           ~ 48 0
52 2MASS J05375027-6911071 Y*O 05 37 50.278 -69 11 07.12           ~ 6 0
53 [OVS2006] N157B S4 * 05 37 51.4 -69 10 56           ~ 1 0
54 NGC 2060 SNR 05 37 51.4470067818 -69 10 23.957283532   9.69 9.59     ~ 330 2
55 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1074 2
56 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1819 1
57 [WWJ83] Maser 0539-691 Mas 05 38 49.6 -69 04 41           ~ 3 0
58 [WWJ83] Maser 0539-691B Mas 05 39 03.9 -69 08 18           ~ 2 0
59 NGC 2081 HII 05 39 10.50 -69 30 16.0           ~ 50 1
60 LWKHK g Mas 05 39 39.05 -69 39 10.8           ~ 3 1
61 NGC 2080 HII 05 39 42.6 -69 38 50           ~ 97 1
62 LWKHK f Mas 05 39 43.92 -69 38 33.6           ~ 2 1
63 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 258 2
64 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 112 1
65 SNR B0547-69.7 SNR 05 47 17.5 -69 41 38           ~ 92 1
66 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 616 0
67 NAME Local Group GrG ~ ~           ~ 7383 0

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2021.10.17-00:26:20

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