2011ApJ...733...41M

Query : 2011ApJ...733...41M

2011ApJ...733...41M - Astrophys. J., 733, 41 (2011/May-3)

Massive stars in the Cl 1813-178 cluster: an episode of massive star formation in the W33 complex.

MESSINEO M., DAVIES B., FIGER D.F., KUDRITZKI R.P., VALENTI E., TROMBLEY C., NAJARRO F. and RICH R.M.

Abstract (from CDS):

Young massive (M > 104 M☉) stellar clusters are a good laboratory to study the evolution of massive stars. Only a dozen of such clusters are known in the Galaxy. Here, we report about a new young massive stellar cluster in the Milky Way. Near-infrared medium-resolution spectroscopy with UIST on the UKIRT telescope and NIRSPEC on the Keck telescope, and X-ray observations with the Chandra and XMM satellites, of the Cl 1813-178 cluster confirm a large number of massive stars. We detected 1 red supergiant, 2 Wolf-Rayet stars, 1 candidate luminous blue variable, 2 OIf, and 19 OB stars. Among the latter, twelve are likely supergiants, four giants, and the faintest three dwarf stars. We detected post-main-sequence stars with masses between 25 and 100 M☉. A population with age of 4-4.5 Myr and a mass of ∼10, 000 M☉ can reproduce such a mixture of massive evolved stars. This massive stellar cluster is the first detection of a cluster in the W33 complex. Six supernova remnants and several other candidate clusters are found in the direction of the same complex.

Abstract Copyright: ∼

Journal keyword(s): infrared: stars - stars: evolution

Nomenclature: Tables 1+7: [MFD2008] NN (Nos 12-61) added. Table 5: [MDF2011b] clN (Nos cl1-cl2).

Simbad objects: 90

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Number of rows : 90
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 Car-Sgr Arm PoG 15 00 -40.0           ~ 581 1
2 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
3 Cl* Westerlund 1 W 243 s*b 16 47 07.5040736160 -45 52 29.123491188   19.873 15.730     LBV 67 0
4 HD 151804 s*b 16 51 33.7218052272 -41 13 49.919519496 4.45 5.29 5.22     O8Iaf 389 0
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
6 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 561 0
7 [GMC99] D6 s*b 17 46 17.982 -28 49 03.46           LBV 66 0
8 HD 316285 s*b 17 48 14.0372119152 -28 00 53.121269592 11.88 11.27 9.60 9.28   B0Ieq 197 2
9 NAME 1806-20 Star Cluster OpC 18 08 39.0 -20 24 39           ~ 35 1
10 [BDS2003] 7 OpC 18 10 55 -17 41.4           ~ 3 0
11 SNR G012.2+00.3 SNR 18 11.3 -18 10           ~ 20 0
12 SNR G012.5+00.2 Rad 18 12.2 -17 55           ~ 20 1
13 [MFD2008] 50 * 18 13 10.7695457088 -17 54 47.536238628           K5.5III 1 0
14 [MFD2008] 41 * 18 13 12.1594031664 -17 51 58.523414256           K5III 1 0
15 2MASS J18131225-1751268 * 18 13 12.251 -17 51 26.83           M6III 1 0
16 2MASS J18131249-1754283 * 18 13 12.5011220832 -17 54 28.505881512   19.01 15.37 13.95   O9-B3 1 0
17 2MASS J18131298-1754023 * 18 13 12.986 -17 54 02.32           >G 1 0
18 WR 111-2 WR* 18 13 14.1994270440 -17 53 43.448402832   20.48 17.57 15.20   WN7b 8 0
19 [MFD2008] 27 * 18 13 14.3912601432 -17 54 47.940237684       17.48   M4.5III 1 0
20 UCAC2 25154406 * 18 13 14.4923873328 -17 54 01.791645228   19.91 15.47 15.71 12.42 O7-O9 2 0
21 [MFD2008] 40 * 18 13 14.6677324992 -17 51 32.422769316   16.43 14.40 13.69   K5.5III 1 0
22 2MASS J18131488-1757221 * 18 13 14.882 -17 57 22.18   18.60   18.54   M7III 1 0
23 2MASS J18131635-1750298 s*r 18 13 16.352 -17 50 29.89           M2.5I 1 0
24 [MFD2008] 31 * 18 13 16.8025275264 -17 55 40.124376444   21.42 16.78 14.36   M2.5III 1 0
25 [MFD2008] 57 * 18 13 17.2305041400 -17 55 21.799020756   15.93 13.67 15.02   K0.5III 1 0
26 2MASS J18131757-1754520 * 18 13 17.575 -17 54 52.09           M7III 1 0
27 SNR G012.7+00.0 SNR 18 13.3 -17 54           ~ 26 0
28 [MFD2008] 51 * 18 13 18.5551863648 -17 56 18.425642028       18.42   K4III 1 0
29 2MASS J18131869-1751149 * 18 13 18.6989808840 -17 51 14.872795344   20.67 15.81 16.69   K5.5III 5 0
30 2MASS J18131908-1752585 * 18 13 19.0778996928 -17 52 58.478981952       16.90   O8-O9If 3 0
31 2MASS J18131924-1753226 * 18 13 19.2414661944 -17 53 22.638916284           O9-B3 1 0
32 2MASS J18131954-1755013 * 18 13 19.545 -17 55 01.37   17.16 17.08     M2.5III 1 0
33 2MASS J18131997-1753423 * 18 13 19.974 -17 53 42.39           M6III 1 0
34 [MFD2008] 59 * 18 13 20.0111853888 -17 53 50.127579276   15.83 14.87 15.93   K1.5III 1 0
35 2MASS J18132064-1753502 * 18 13 20.647 -17 53 50.28           M6.5III 1 0
36 [MFD2008] 15 s*b 18 13 20.9841275352 -17 49 47.006249052   19.67   15.40   LBV: 7 0
37 [MFD2008] 37 * 18 13 21.3669336168 -17 58 04.647075636   15.18 13.87 14.64   K3.5III 1 0
38 2MASS J18132154-1754356 * 18 13 21.5459727408 -17 54 35.634052188           O7-O8 1 0
39 [HGH2007] 36 * 18 13 21.9139076424 -17 51 35.997444792   21.17   16.24   O7-O9 3 0
40 2MASS J18132197-1753206 * 18 13 21.976 -17 53 20.70           M3III 1 0
41 IRAS 18104-1755 s*r 18 13 22.2560234736 -17 54 15.556634244   14.74 13.68 12.73   K2I 9 0
42 WR 111-4 WR* 18 13 22.4922702768 -17 53 50.308426968   18.63 15.60 16.57 13.63 WN7 8 0
43 UCAC2 25154542 * 18 13 23.2567717632 -17 53 26.557207296   20.08 15.03 14.50 11.62 B0-B3 2 0
44 DENIS J181323.5-175324 * 18 13 23.62 -17 53 24.5         14.63 B0-B3 2 0
45 CXOU J181323.7-175040 * 18 13 23.7150374736 -17 50 40.344083628   19.51 16.41 14.94 13.01 O7-O9 3 0
46 2MASS J18132387-1753101 * 18 13 23.8744361376 -17 53 10.037664492           O9-B3 1 0
47 [MFD2008] Stellar Cluster OpC 18 13 24.0 -17 53 31           ~ 17 0
48 UCAC2 25154559 * 18 13 24.4323527664 -17 52 56.772381324   20.42 15.74 14.68 12.36 B0-B3 4 0
49 2MASS J18132516-1753100 * 18 13 25.1689828992 -17 53 10.059528840     16.84 13.98   O9-B3 1 0
50 [MFD2008] 49 * 18 13 25.1752744944 -17 49 36.001369560   13.82 13.12 12.08   K3III 1 0
51 2MASS J18132523-1751355 * 18 13 25.232 -17 51 35.54   15.37 14.90     O9-B3 1 0
52 2MASS J18132524-1753574 * 18 13 25.2415334640 -17 53 57.372519660   19.49 16.20 16.28   O7-O9 1 0
53 2MASS J18132529-1753542 * 18 13 25.2948397992 -17 53 54.149342712   20.13 16.60 14.02   O7-O9 1 0
54 2MASS J18132569-1752010 * 18 13 25.697 -17 52 01.02           M6.5III 1 0
55 2MASS J18132588-1753570 * 18 13 25.8892357248 -17 53 57.041422620       20.28   O9-B3 1 0
56 2MASS J18132592-1757397 * 18 13 25.927 -17 57 39.75   16.25 16.37     M5.5III 1 0
57 2MASS J18132632-1753570 * 18 13 26.324 -17 53 57.00     17.34     K4.5III 1 0
58 2MASS J18132647-1752495 * 18 13 26.4685532736 -17 52 49.528275204   16.27 14.25 13.01   B0-B3 2 0
59 2MASS J18132686-1755274 LP? 18 13 26.8690584624 -17 55 27.504583752           M5III 2 0
60 [MFD2008] 55 * 18 13 27.0293392680 -17 50 27.770493048   15.43 14.38 15.62   >G 1 0
61 2MASS J18132773-1752330 * 18 13 27.7327785480 -17 52 33.063884724     13.46 13.13   B0-B3 1 0
62 TYC 6268-1604-1 * 18 13 28.5933866496 -17 50 30.787934208   12.45 11.65 11.15   K0.5III 3 0
63 2MASS J18132895-1755528 s*r 18 13 28.956 -17 55 52.85           M3.5I 1 0
64 [MFD2008] 29 * 18 13 29.1380095008 -17 52 27.214216572   16.19 13.16 13.13   M3III 1 0
65 2MASS J18132919-1755143 LP? 18 13 29.1869583768 -17 55 14.392976484   21.09   15.66   B0-B3 2 0
66 2MASS J18132936-1751476 s*r 18 13 29.363 -17 51 47.65           M1I 1 0
67 2MASS J18133143-1752410 * 18 13 31.438 -17 52 41.01           M7III 1 0
68 DENIS J181333.8-175148 * 18 13 33.8156177520 -17 51 48.600776412       16.12 14.05 O6-O7f 3 0
69 [MFD2008] 35 * 18 13 34.1007098208 -17 51 28.609045056           M2III 1 0
70 [MFD2008] 28 * 18 13 35.0159178816 -17 54 26.004048552   12.85 12.70     M4III 1 0
71 NAME AGPS 273.4-17.8 SNR 18 13 35.05 -17 49 58.1           ~ 145 2
72 2MASS J18133517-1750440 * 18 13 35.173 -17 50 44.06           M2.5III 1 0
73 [MFD2008] 54 * 18 13 35.1936023856 -17 57 33.255672228   12.71 12.33 11.85   K0III 1 0
74 SNR G012.8-00.0 SNR 18 13.6 -17 49           ~ 68 0
75 2MASS J18133815-1757075 * 18 13 38.151 -17 57 07.51           M6.5III 1 0
76 2MASS J18134120-1755413 LP? 18 13 41.2043296968 -17 55 41.291325444     17.42 18.09   B9-A2 2 0
77 NOMAD1 0720-0809309 * 18 13 47.5415677176 -17 57 00.906431724   15.32   13.64 12.59 K0.5III 2 0
78 [MCM2005b] 1 OpC 18 13 55 -17 56.9           ~ 17 0
79 [BDS2003] 115 OpC 18 14 05 -17 28.7           ~ 8 0
80 MAGPIS G13.1875+0.0389 Rad 18 14 07.0 -17 28 43           ~ 1 0
81 [MDF2011b] cl2 As* 18 14 08.0 -18 00 15           ~ 11 0
82 W 33 SFR 18 14 14.0 -17 55 50           ~ 292 0
83 [MDF2011b] cl1 As* 18 14 22.0 -17 56 10           ~ 4 0
84 W 33a Y*O 18 14 39.56547 -17 52 02.2260           ~ 746 0
85 MAGPIS G12.9139-0.2806 Rad 18 14 44.0 -17 52 47           ~ 1 0
86 HD 168607 s*b 18 21 14.8856951904 -16 22 31.763755236 10.23 9.82 8.28 8.55   B9Ia+ 196 1
87 RSGC 1 OpC 18 37 58 -06 53.0           ~ 117 0
88 MR 89 WR* 18 41 00.8670061488 -04 26 14.484137676 13.1 12.97 11.93 11.67   WN7 74 2
89 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
90 NAME Galactic Bar reg ~ ~           ~ 1458 0

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