2008A&A...488..151B

Query : 2008A&A...488..151B

2008A&A...488..151B - Astronomy and Astrophysics, volume 488, 151-159 (2008/9-2)

The young Galactic star cluster [DBS2003] 179.

BORISSOVA J., IVANOV V.D., HANSON M.M., GEORGIEV L., MINNITI D., KURTEV R. and GEISLER D.

Abstract (from CDS):

Recent near- and mid-infrared surveys have brought evidence that the Milky Way continues to form massive clusters. We carry out a program to determine the basic physical properties of the new massive cluster candidate [DBS2003] 179. Medium-resolution K-band spectra and deep near-infrared images of [DBS2003] 179 were used to derive the spectral types of eight member stars, and to estimate the distance and reddening to the cluster. Seven of ten stars with spectra show emission lines. Comparison with template spectra indicated that they are early O-type stars. The mean radial velocity of the cluster is Vrad=-77±6km/s. Knowing the spectral types of the members and the color excesses, we determined extinction AV∼16.6 and distance modulus (m-M)0∼14.5mag (D∼7.9Kpc). The presence of early O-stars and a lack of red supergiants suggests a cluster age of 2-5Myr. The total cluster mass is approximated to 0.7x10 4M☉ and it is not yet dynamically relaxed. The candidate [DBS2003] 179 further increases the family of the massive young clusters in the Galaxy, although it appears less massive than the prototypical starburst clusters.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: open clusters and associations: general - Galaxy: open clusters and associations: individual: [DBS2003] 179 - stars: early-type - stars: emission-line, Be

Nomenclature: Fig.2, Table 1: [BIH2008] objNN (Nos obj1-obj10).

Simbad objects: 44

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Number of rows : 44
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 HD 13268 * 02 11 29.7003301008 +56 09 31.721738760 7.48 8.24 8.18     ON8.5IIIn 179 0
2 HD 15570 Em* 02 32 49.4207394600 +61 22 42.089384892 8.40 8.80 8.11 7.41 6.86 O4If 305 0
3 HD 15629 Y*O 02 33 20.5873992264 +61 31 18.188762844 8.23 8.85 8.42     O4.5V((fc)) 241 0
4 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2257 1
5 HD 269582 WR* 05 27 52.6621673400 -68 59 08.488879836 12.206 10.818 11.093 12.70 11.234 WN10h 108 0
6 HD 36166 Pu* 05 29 54.7742113464 +01 47 21.333288804 4.74 5.562 5.745     B2V 121 0
7 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
8 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2018 2
9 HD 46150 Y*O 06 31 55.5205071744 +04 56 34.296516096 6.03 6.86 6.73 6.50 6.41 O5V((f))z 396 0
10 HD 46223 Y*O 06 32 09.3068103600 +04 49 24.705695568 6.73 7.50 7.28 6.95 6.79 O4V((f)) 381 0
11 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1154 1
12 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 356 0
13 HD 97950 Cl* 11 15 07.346 -61 15 38.52 9.64 9.83 9.03 9.69   ~ 192 2
14 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1065 1
15 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 306 0
16 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 514 1
17 RCW 87 HII 15 05 19 -57 31.8           ~ 44 2
18 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 296 2
19 Cl Westerlund 1 Cl* 16 47 02.4 -45 51 07           ~ 566 0
20 GAL 347.60+00.21 HII 17 11 30.3 -39 08 38           ~ 8 0
21 [BIH2008] obj7 * 17 11 30.480 -39 10 48.94           ~ 1 0
22 [BIH2008] obj6 Y*O 17 11 31.270 -39 10 50.10           ~ 2 0
23 [BIH2008] obj8 * 17 11 31.650 -39 10 50.46           O4/5I 2 0
24 [BIH2008] obj2 * 17 11 31.730 -39 10 44.28           O5/6V 2 0
25 [BIH2008] obj5 * 17 11 31.850 -39 10 50.77           O5/6I 2 0
26 [BIH2008] obj4 * 17 11 31.890 -39 10 47.15           Ofpe/WN9 3 0
27 [BIH2008] obj10 * 17 11 32.000 -39 10 50.89           O8V 2 0
28 [DBS2003] 179 OpC 17 11 32.0 -39 10 38           ~ 39 0
29 [BIH2008] obj3 * 17 11 32.030 -39 10 48.76           O5/6If 2 0
30 [BIH2008] obj1 * 17 11 32.140 -39 10 49.74           O5/6V 2 0
31 2MASS J17113331-3910517 * 17 11 33.32 -39 10 51.7           ~ 1 0
32 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14407 0
33 GCIRS 34W WR* 17 45 39.73 -29 00 26.6           Ofpe/WN9 61 0
34 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 736 0
35 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 525 0
36 HD 161653 * 17 48 28.1365443960 -38 08 00.599876448 6.45 7.22 7.20 8.32   B2II 53 0
37 HD 167785 * 18 16 22.2040390176 +10 48 53.281752300   7.48 7.57     B2V 24 0
38 RSGC 1 OpC 18 37 58 -06 53.0           ~ 106 0
39 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 93 0
40 W 49 SFR 19 10 20 +09 07.7           ~ 575 1
41 MR 97 WR* 20 00 19.1223016752 +33 15 51.099973956 12.93 13.050 12.080     WN7h 81 0
42 HD 191639 Be* 20 11 10.0777272648 -08 50 32.440964532 5.42 6.34 6.49     B1IVe 77 0
43 Schulte 8C * 20 33 17.9820761856 +41 18 31.194812988 12.2 11.43 10.19     O4.5III(fc) 83 0
44 BD+49 3718 HXB 22 01 38.2021351296 +50 10 04.633278528 8.95 9.47 9.31     Be 47 0

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