2009ApJ...697..701M

Query : 2009ApJ...697..701M

2009ApJ...697..701M - Astrophys. J., 697, 701-712 (2009/May-3)

Near-infrared spectra of galactic stellar clusters detected on Spitzer/GLIMPSE images.

MESSINEO M., DAVIES B., IVANOV V.D., FIGER D.F., SCHULLER F., HABING H.J., MENTEN K.M. and PETR-GOTZENS M.G.

Abstract (from CDS):

We present near-infrared spectroscopic observations of massive stars in three stellar clusters located in the direction of the inner Galaxy. One of them, the Quartet, is a new discovery while the other two were previously reported as candidate clusters identified on mid-infrared Spitzer images (GLIMPSE20 and GLIMPSE13). Using medium-resolution (R = 900-1320) H and K spectroscopy, we firmly establish the nature of the brightest stars in these clusters, yielding new identifications of an early WC and two Ofpe/WN9 stars in the Quartet and an early WC star in GLIMPSE20. We combine this information with the available photometric measurements from Two Micron All Sky Survey, to estimate cluster masses, ages, and distances. The presence of several massive stars places the Quartet and GLIMPSE20 among the small sample of known Galactic stellar clusters with masses of a few 103 M☉, and ages from 3 to 8 Myr. We estimate a distance of about 3.5 kpc for GLIMPSE20 and 6.0 kpc for Quartet. The large number of giant stars identified in GLIMPSE13 indicates that it is another massive (∼6500 M☉) cluster, but older, with an age between 30 and 100 Myr, at a distance of about 3 kpc.

Abstract Copyright: ∼

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

Nomenclature: Text, Table 1: NAME The Quartet. Table 2: [MDI2009] Quartet N (Nos 1-9), [MDI2009] GLIMPSE20 NN (Nos 1-11), [MDI2009] GLIMPSE13 NN (Nos 1-15).

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 - 2026 		#notes
1 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
2 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0
3 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
4 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
6 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 387 0
7 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 792 0
8 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 561 0
9 IRAS 18335-0713A IR 18 36 12.2 -07 10 38           ~ 5 0
10 [ABB2014] WISE G024.844+00.093 bub 18 36 15.3 -07 09 13           ~ 18 0
11 2MASS J18361633-0705169 WR* 18 36 16.331 -07 05 16.96           WC9 3 0
12 WR 118-2 WR* 18 36 16.6869394848 -07 04 59.317991400           WN9/Ofpe 3 0
13 [MDI2009] Quartet 7 * 18 36 16.8783016824 -07 05 13.846622316           OB 2 0
14 NAME the Quartet OpC 18 36 17.0 -07 05 02           ~ 8 0
15 IRAS 18335-0711 HII 18 36 17.1 -07 09 02           ~ 17 0
16 WR 118-3 WR* 18 36 17.291 -07 05 07.27           WN9/Ofpe 3 0
17 2MASS J18361755-0704587 * 18 36 17.550 -07 04 58.77           OB 2 0
18 2MASS J18361807-0704424 * 18 36 18.077 -07 04 42.44           K-M 1 0
19 2MASS J18361869-0705057 * 18 36 18.696 -07 05 05.74           K-M 1 0
20 [MDI2009] Quartet 4 * 18 36 19.2104110992 -07 04 02.104237128           K-M 1 0
21 2MASS J18362103-0703102 * 18 36 21.032 -07 03 10.24           OB 1 0
22 RSGC 1 OpC 18 37 58 -06 53.0           ~ 117 0
23 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 102 0
24 RSGC 3 OpC 18 45 20.0 -03 24 43           ~ 58 0
25 [MDI2009] GLIMPSE13 12 * 18 53 45.5930020680 +00 36 25.738223508           K1III 1 0
26 [MDI2009] GLIMPSE13 5 * 18 53 52.0506938952 +00 37 57.783024120           M0III 1 0
27 2MASS J18535240+0040172 sg? 18 53 52.401 +00 40 17.22           K5III 3 0
28 [MDI2009] GLIMPSE13 13 * 18 53 52.4383432056 +00 37 21.864795420           G9III 1 0
29 IRC +00389 AB* 18 53 52.4880921000 +00 39 31.395152016           M0I/M7III 17 0
30 [MCM2005b] 13 OpC 18 53 53 +00 37.7           ~ 9 0
31 [MDI2009] GLIMPSE13 10 * 18 53 53.0576938608 +00 37 05.632834800           K5III 1 0
32 [MDI2009] GLIMPSE13 8 * 18 53 53.1305274984 +00 37 22.971605304           K5III 1 0
33 [MDI2009] GLIMPSE13 4 * 18 53 53.1718632936 +00 38 00.177802512           K5III 1 0
34 [MDI2009] GLIMPSE13 14 * 18 53 53.2142966664 +00 38 27.630052044           G9III 1 0
35 [MDI2009] GLIMPSE13 6 * 18 53 53.5851782112 +00 37 08.407779132           K4III 1 0
36 [MDI2009] GLIMPSE13 9 * 18 53 53.5897908336 +00 37 46.445263392           K5III 1 0
37 [MDI2009] GLIMPSE13 7 * 18 53 53.7050518032 +00 38 05.579981772           K5III 1 0
38 [MDI2009] GLIMPSE13 3 * 18 53 53.8872957120 +00 37 12.277505640           M1III 1 0
39 [MDI2009] GLIMPSE13 11 * 18 53 54.4679349576 +00 37 23.080576980           K5III 1 0
40 2MASS J18535594+0037203 * 18 53 55.942 +00 37 20.33           K2III 1 0
41 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
42 W 49a SFR 19 10 15.7 +09 06 05           ~ 325 2
43 W 49 SFR 19 10 20 +09 07.7           ~ 601 1
44 [ABB2014] WISE G044.224+00.085 bub 19 11 57.7 +10 07 05           ~ 22 0
45 2MASS J19121864+0955532 * 19 12 18.649 +09 55 53.25           K-M 1 0
46 2MASS J19122111+0956450 * 19 12 21.114 +09 56 45.08           K-M 1 0
47 [MDI2009] GLIMPSE20 9 * 19 12 21.4638751776 +09 56 53.102683752           OB 2 0
48 2MASS J19122314+0956463 LP? 19 12 23.1439104936 +09 56 46.283044128           OB 3 0
49 [MDI2009] GLIMPSE20 11 * 19 12 23.3963487192 +09 57 33.825385224           K-M 2 0
50 2MASS J19122356+0957378 * 19 12 23.5696617624 +09 57 37.741848948           OB 2 0
51 2MASS J19122369+0957188 * 19 12 23.695 +09 57 18.89           K-M 2 0
52 IRAS 19100+0951 s*y 19 12 23.7302944392 +09 57 07.901765964           GI 8 0
53 2MASS J19122407+0957290 WR* 19 12 24.079 +09 57 29.00           WC 3 0
54 2MASS J19122475+0956381 LP? 19 12 24.7608709512 +09 56 38.039519544           K-M 2 0
55 [MCM2005b] 20 OpC 19 12 25 +09 57.7           ~ 17 0
56 [MDI2009] GLIMPSE20 5 * 19 12 25.0875438768 +09 57 46.870374996           K-M 1 0
57 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
58 NAME Galactic Bar reg ~ ~           ~ 1458 0

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