1998A&AS..127..423P

Query : 1998A&AS..127..423P

1998A&AS..127..423P - Astron. Astrophys., Suppl. Ser., 127, 423-432 (1998/February-1)

Fundamental parameters of the highly reddened young open clusters Westerlund 1 and 2.

PIATTI A.E., BICA E. and CLARIA J.J.

Abstract (from CDS):

We study the compact open clusters Westerlund1 (BH197) and Westerlund2. We present CCD integrated spectroscopy for both clusters, and CCD imaging in the V and I bands for the former one. So far, Westerlund1 is possibly the most reddened open cluster studied in detail (Av≃13.0). It has an age of 8±3Myr and a distance from the Sun of d☉≃1.0±0.4kpc. For Westerlund2 we derive a visual absorption AV≃5.0mag, an age of 2-3Myr, and d☉=5.7±0.3kpc. From luminosity and structural arguments we conclude that Westerlund1, although young and compact, it is a massive cluster, in contrast to Westerlund2.

Abstract Copyright: ∼

Journal keyword(s): open clusters: individual: Cl Westerlund 1, Cl Westerlund 2 - open clusters: general

VizieR on-line data: <Available at CDS (J/A+AS/127/423): table>

Nomenclature: Table: Cl* Westerlund 1 PBC NNN (Nos 1-233)

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 31

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Number of rows : 31
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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 NGC 457 OpC 01 19 32.4 +58 16 40   6.97 6.4     ~ 259 2
3 NGC 884 OpC 02 22 15.7 +57 08 59           ~ 503 0
4 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
5 GUM 29 HII 10 24 14.6 -57 46 58           ~ 219 0
6 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
7 HD 97950 Cl* 11 15 07.346 -61 15 38.52 9.64 9.83 9.03 9.69   ~ 198 2
8 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
9 NGC 4755 OpC 12 53 39.2 -60 22 07           ~ 300 0
10 SA 107- reg 15 39.2 -00 20           ~ 91 0
11 NGC 6067 OpC 16 13 10.2 -54 13 48           ~ 239 0
12 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 526 0
13 SA 108- reg 16 32 08 +00 22.1           ~ 10 0
14 Cl* Westerlund 1 BKS H s*y 16 47 01.4269856784 -45 50 37.248841536   18.781 14.47 11.80 9.15 F3Ia+ 31 0
15 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
16 Cl* Westerlund 1 W 7 s*b 16 47 03.6281794392 -45 50 14.365482036   20.0 15.972 12.73 9.99 B5Ia+ 31 0
17 Cl* Westerlund 1 BKS F s*y 16 47 03.6850109472 -45 50 43.536110712     15.05     F5Ia+ 23 0
18 Cl* Westerlund 1 W 31 s*b 16 47 03.7862784096 -45 50 40.366601376           B0I+OB 11 0
19 Cl* Westerlund 1 W 33 s*b 16 47 04.1256274968 -45 50 48.488202564   20.090 15.61 12.803 10.04 B5Ia+ 26 0
20 Cl* Westerlund 1 W 9 WR* 16 47 04.1419806984 -45 50 31.311670632   21.8 17.47 14.47 11.74 sgB[e] 56 0
21 Cl* Westerlund 1 W 8 s*y 16 47 04.7959778348 -45 50 25.013789709   19.9 15.913 12.64 9.89 F8Ia+ 23 0
22 2MASS J16470540-4550367 s*r 16 47 05.4076906176 -45 50 36.617071668   22.1 16.79 12.63 9.19 M2-5Ia 40 0
23 Cl* Westerlund 1 W 16 sg* 16 47 06.6158603112 -45 50 42.186706944   20.5 16.248 12.82 9.90 A5Ia+ 29 0
24 HD 160233 bC* 17 38 40.6357996296 +04 20 09.783566016 8.2 9.00 9.04     B1II 47 0
25 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 222 0
26 NGC 6705 OpC 18 51 03.7 -06 16 18   6.32 5.8     ~ 442 0
27 SA 112- reg 20 42 07 +00 31.4           ~ 23 0
28 Cl* Westerlund 1 PBC 203 * ~ ~           ~ 1 0
29 Cl* Westerlund 1 PBC 183 * ~ ~           ~ 1 0
30 Cl* Westerlund 1 PBC 167 * ~ ~           ~ 1 0
31 Cl* Westerlund 1 PBC 188 * ~ ~           ~ 1 0

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