CDS

2002A&A...396L..25C

C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET12:34:52

2002A&A...396L..25C - Astronomy and Astrophysics, volume 396, L25-29 (2002/12-4)

A hidden population of Wolf-Rayet stars in the massive galactic cluster Westerlund 1.

CLARK J.S. and NEGUERUELA I.

Abstract (from CDS):

We report the discovery of a hitherto undetected population of Wolf-Rayet stars in the young galactic open cluster Westerlund 1. Optical spectroscopy of the cluster identified 11 such objects; provisional classification suggests that 6 are nitrogen rich (WN) and 5 carbon rich (WC). Including the previously identified Blue, Yellow & Red Super- & Hypergiants, Westerlund 1 clearly has a very rich population of massive post-Main Sequence objects. To date, the post-MS population of Westerlund 1 is significantly larger than that of any other galactic young open cluster - with the possible exception of the Arches - implying that it is potentially amongst the most massive young clusters yet identified in the Local Group.

Abstract Copyright: ∼

Journal keyword(s): stars: evolution - stars: Wolf Rayet - galaxies: starbursts

Nomenclature: Table 1: Cl* Westerlund 1 CN A (Nos A-K).

CDS comments: Objects YHG W NNN and YSG WN = Cl* Westerlund 1 W NNN.

Simbad objects: 40

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Number of rows : 40

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 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1779 1
2 Cl Collinder 228 OpC 10 44 00 -60 05.2   4.58 4.4     ~ 192 0
3 NGC 3603 OpC 11 15 18.6 -61 15 26           ~ 972 1
4 HD 117297 WR* 13 30 53.2511996037 -62 04 51.856386987 10.81 11.10 10.90 10.70   WC8 91 0
5 WR 77c WR* 16 47 00.8819171237 -45 51 20.512015820     19 17.336 14.340 WN8o 11 0
6 Cl* Westerlund 1 BKS H * 16 47 01.4273629136 -45 50 37.260634424   18.781 14.47     F3Ia+ 24 0
7 WR 77e WR* 16 47 01.668 -45 51 20.40     19     WN 10 0
8 Cl* Westerlund 1 W 12 * 16 47 02.23 -45 50 59.1   22.0 17.575 13.611   F1Ia+ 21 0
9 Cl* Westerlund 1 BKS B * 16 47 03.1074828977 -45 52 18.957165027   22.8 19.008 13.634   M3Ia 22 0
10 WR 77g WR* 16 47 03.15 -45 50 43.8     19     WN 11 0
11 Hen 3-1250 Em* 16 47 03.6265799796 -45 50 14.357624931   20.0 15.972     B5Ia+ 23 0
12 Cl* Westerlund 1 BKS F s*y 16 47 03.6836562279 -45 50 43.530430986     15.05     F5Ia+ 19 0
13 Cl* Westerlund 1 W 46a s*b 16 47 03.93 -45 51 19.6   23.0 18.55 15.537 12.499 B1Ia 12 0
14 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 485 0
15 Cl* Westerlund 1 CN G WR* 16 47 04.03 -45 51 25.1   22.7 20.87 17.75 14.68 WN7o 15 0
16 Cl* Westerlund 1 W 33 * 16 47 04.1266525740 -45 50 48.475675980   20.090 15.61 12.803   B5Ia+ 20 0
17 Cl* Westerlund 1 CN H WR* 16 47 04.22 -45 51 20.2           WC9d 10 0
18 Cl* Westerlund 1 CN C WR* 16 47 04.40 -45 51 03.8     19     WC9d 8 0
19 WR 77n WR* 16 47 05.2111619515 -45 52 24.987049941   21.7 17.86 15.39 12.90 WC9d 24 0
20 WR 77o WR* 16 47 05.37 -45 51 04.7     20.99 17.50 14.37 WN7o 21 0
21 WR 77p WR* 16 47 06.0558179916 -45 52 08.310667517     18.379 15.675 12.940 WC9 18 0
22 Cl* Westerlund 1 W 265 * 16 47 06.2786920752 -45 49 23.781230202   22.0 17.739   10.54 F1-5Ia+ 20 0
23 WR 77r WR* 16 47 06.28 -45 51 26.4     19 18.935 15.600 WN7o 15 0
24 Cl* Westerlund 1 W 16 * 16 47 06.6152064188 -45 50 42.171179650   20.5 16.248     A5Ia+ 23 0
25 WR 77s WR* 16 47 08.3531944202 -45 50 45.405753222     19.69 16.59 13.68 WN7b 23 0
26 Cl* Westerlund 1 W 71 * 16 47 08.4569033058 -45 50 49.327340354   21.5 17.531 14.158 11.16 B2.5Ia 17 0
27 Cl* Westerlund 1 BKS E * 16 47 08.9189383747 -45 49 58.452680562     16.70     M4Ia 18 0
28 Cl* Westerlund 1 W 70 * 16 47 09.3840936441 -45 50 49.680751506   21.2 16.88   11.352 B3Ia 13 0
29 HD 157451 WR* 17 25 23.2779746024 -43 29 31.469615959 10 10.59 10.20 10.46   WC9 84 0
30 Cl Trumpler 27 OpC 17 36 20 -33 31.0   8.24 6.7     ~ 93 1
31 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 12014 0
32 GCIRS 7 * 17 45 39.987 -29 00 22.24           M2 350 0
33 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 649 0
34 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 462 0
35 MR 80 WR* 18 02 04.1238716757 -23 37 42.144766363   14.85       WC9 213 2
36 HD 168206 WR* 18 19 07.3628284656 -11 37 59.165038875 9.65 9.88 9.10     WC8+O8/9III/V 286 1
37 HD 192103 WR* 20 11 53.5274946554 +36 11 50.523501826 7.77 8.13 8.11     WC8+OB: 324 0
38 Cl Berkeley 87 OpC 20 21 43.01 +37 22 13.8           ~ 112 0
39 * rho Cas LP* 23 54 23.0339951270 +57 29 57.766930774 7.00 5.85 4.59 3.63 2.89 G2_0 365 0
40 NAME Local Group GrG ~ ~           ~ 7188 0

    Equat.    Gal    SGal    Ecl

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2021.03.08-12:34:52

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