31:
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231:
are all thought to be members of the cluster, although possibly now runaway members. All five Wolf Rayets are extremely young massive objects with OIf/WN spectral types, amongst the most luminous stars in the galaxy. This composite spectral type indicates young very massive hydrogen-burning stars
500:
Hur, Hyeonoh; Park, Byeong-Gon; Sung, Hwankyung; Bessell, Michael S.; Lim, Beomdu; Chun, Moo-Young; Sohn, Sangmo Tony (2015). "Reddening, distance, and stellar content of the young open cluster
Westerlund 2".
170:, with an estimated age of about one or two million years. It contains some of the hottest, brightest, and most massive stars known. The cluster resides inside a stellar breeding ground known as
733:
787:
346:
695:
Moffat; et al. (1 August 1991). "New Wolf-Rayet stars in
Galactic open clusters - Sher 1 and the giant H II region core Westerlund 2".
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546:
30:
780:
286:
1905:
1881:
773:
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560:
Carraro, G.; Turner, D.; Majaess, D.; Baume, G. (2013). "The distance to the young open cluster
Westerlund 2".
1910:
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750:
291:
On 23 April 2015 an image of the
Westerlund 2 cluster was chosen to celebrate the 25th anniversary of the
812:
447:
Rauw; et al. (1 March 2007). "Early-type stars in the core of the young open cluster
Westerlund 2".
1349:
175:
174:, located 20,000 light-years away in the constellation Carina. It is half a degree from the naked eye
240:, itself a massive binary, lies in the same direction but is unlikely to be a member of Westerlund 2.
889:
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336:
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761:
NASA Astronomy
Picture of the Day: Cluster and Star Forming Region Westerlund 2 (25 April 2015)
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that are just starting to convect nitrogen and helium to the surface and develop denser
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369:"Cloud-cloud collision which triggered formation of the super star cluster RCW38"
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are found in the vicinity of
Westerlund 2, although not in the central core.
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in the 1960s but its stellar content was assessed only in later years.
430:"Hubble Space Telescope Celebrates 25 Years of Unveiling the Universe"
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197:. All are hotter than 38,000 K and more luminous than 230,000
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As its name indicates, the
Westerlund 2 cluster was discovered by
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Ascenso, J.; Alves, J.; Beletsky, Y.; Lago, M. T. V. T. (2007).
204:. There are around 20 further O class stars in the cluster, all
116:
Contains some of the hottest, brightest, and most massive stars.
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254:. These stars constrain the age of the cluster to near 2 Myr.
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615:"Near-IR imaging of Galactic massive clusters: Westerlund 2"
236:
so that they show the emission lines of a Wolf-Rayet star.
219:, a binary consisting of two WR stars, and the single stars
822:
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is an obscured compact young star cluster (perhaps even a
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208:objects implying a very young age for the cluster.
1847:
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503:Monthly Notices of the Royal Astronomical Society
243:Westerlund 2 also contains a large number of pre-
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280:
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35:The cluster Westerlund 2 and its surroundings
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347:Centre de données astronomiques de Strasbourg
16:Open star cluster in the Carina constellation
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266:Westerlund 2 surrounded by stellar nursery
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75:−57° 45′ 49″
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189:The cluster contains at least a dozen
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656:"A Heavily Reddened Cluster in Ara"
13:
545:: CS1 maint: unflagged free DOI (
493:
184:
14:
1922:
727:
654:Bengt Westerlund (1 March 1961).
287:List of Hubble anniversary images
247:stars with masses below 2.5
1877:
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29:
755:Young Star Cluster Westerlund 2
1805:Carina Dwarf Spheroidal Galaxy
688:
647:
440:
367:Y. Fukui; et al. (2015).
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193:, of which at least three are
1:
739:Chandra Image of Westerlund 2
315:
281:Hubble 25th Anniversary Image
751:Astronomy Picture of the Day
449:Astronomy & Astrophysics
257:
7:
813:Carina in Chinese astronomy
592:10.1051/0004-6361/201321421
298:
10:
1927:
640:10.1051/0004-6361:20066433
619:Astronomy and Astrophysics
479:10.1051/0004-6361:20066495
404:10.3847/0004-637X/820/1/26
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373:The Astrophysical Journal
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111:Physical characteristics
808:List of stars in Carina
797:Constellation of Carina
744:29 January 2008 at the
631:2007A&A...466..137A
584:2013A&A...555A..50C
471:2007A&A...463..981R
1906:Carina (constellation)
293:Hubble Space Telescope
270:
39:Hubble Space Telescope
1725:Finger of God Globule
1516:HD 95086 b (Levantes)
533:10.1093/mnras/stu2329
265:
152:List of open clusters
1911:Star-forming regions
697:Astronomical Journal
660:Astronomical Journal
59:Right ascension
1849:Astronomical events
709:1991AJ....102..642M
672:1961AJ.....66T..57W
525:2015MNRAS.446.3797H
395:2016ApJ...820...26F
124:ESO 127-18, VDBH 95
1496:HD 63765 b (Yvaga)
271:
195:eclipsing binaries
164:super star cluster
121:Other designations
101:Apparent magnitude
46:Observation data (
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337:"Cl Westerlund 2"
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509:(4): 3797–3819.
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462:astro-ph/0612622
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436:. 23 April 2015.
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275:Bengt Westerlund
213:Wolf–Rayet stars
176:Cepheid variable
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728:External links
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681:10.1086/108585
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206:main sequence
196:
192:
191:early O stars
182:
180:
177:
173:
169:
165:
161:
153:
149:
144:
141:
138:
136:
135:Constellation
132:
127:
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109:
105:
102:
98:
84:
82:
78:
74:
72:
68:
62:
60:
56:
52:
49:
44:
40:
32:
27:
22:
19:
1640:Westerlund 2
1639:
1491:OGLE2-TR-L9b
1486:OGLE-TR-211b
1481:OGLE-TR-182b
1476:OGLE-TR-113b
1471:OGLE-TR-132b
1466:OGLE-TR-111b
757:26 June 2010
700:
696:
690:
663:
659:
649:
622:
618:
608:
565:
561:
555:
541:cite journal
506:
502:
495:
452:
448:
442:
376:
372:
362:
350:. Retrieved
340:
305:Westerlund 1
290:
272:
242:
210:
188:
179:V399 Carinae
160:Westerlund 2
159:
158:
148:Open cluster
129:Associations
24:Westerlund 2
18:
1862:GRB 080916C
1635:Trumpler 16
1630:Trumpler 15
1625:Trumpler 14
1511:HD 85628 Ab
1395:OGLE2-TR-L9
1390:OGLE-TR-211
1385:OGLE-TR-182
1370:NGC 3603-A1
1360:Innes' star
1345:CPD−57°2874
840:α (Canopus)
703:: 642–653.
71:Declination
1895:Categories
1857:GRB 000131
1730:G290.1-0.8
1600:Carina OB2
1595:Carina OB1
1506:HD 65216 c
1501:HD 65216 b
1458:Exoplanets
1380:NGC 3603-C
1375:NGC 3603-B
1355:1E 1048-59
1340:AWI0005x3s
386:1504.05391
316:References
285:See also:
146:See also:
64:10 23 58.1
1620:Platais 8
850:ε (Avior)
575:1305.4309
562:Astronomy
516:1411.0879
413:118096773
379:(1): 26.
258:Discovery
168:Milky Way
166:) in the
103: (V)
1882:Category
1774:Galaxies
1735:Hen 2-47
1532:clusters
1266:4325 (z)
1261:4257 (u)
1246:4177 (t)
1241:4164 (t)
1236:4159 (r)
1226:4138 (K)
1221:4114 (s)
1216:4102 (I)
1211:4089 (L)
1206:4025 (M)
1201:3884 (l)
1196:3856 (m)
1191:3825 (h)
1186:3821 (H)
1181:3728 (k)
1176:3696 (g)
1171:3663 (i)
1166:3643 (G)
1161:3598 (b)
1156:3571 (c)
1151:3415 (e)
1146:3414 (e)
1141:3260 (C)
1136:3220 (B)
1131:3159 (D)
1126:2934 (Q)
1121:2435 (N)
1058:V533 (y)
1048:V520 (w)
1038:V448 (O)
1033:V415 (A)
1028:V399 (P)
1023:V382 (x)
1018:V376 (b)
1008:V371 (z)
1003:V357 (a)
998:V345 (E)
993:V344 (f)
988:V343 (d)
978:V337 (q)
890:Variable
742:Archived
600:53756444
487:17776145
299:See also
252:☉
211:Several
202:☉
81:Distance
37:Credit:
1750:IC 2448
1745:IC 2220
1654:Nebulae
1615:IC 2714
1610:IC 2602
1400:Sher 25
1365:LHS 288
705:Bibcode
668:Bibcode
627:Bibcode
580:Bibcode
568:: A50.
521:Bibcode
467:Bibcode
391:Bibcode
221:WR 20aa
1760:RCW 49
1440:WR 42e
1435:WR 31a
1430:WR 30a
1410:WR 21a
1405:WR 20a
968:PP (p)
734:Simbad
666:: 57.
598:
485:
411:
342:SIMBAD
268:RCW 49
229:WR 20c
227:, and
225:WR 20b
217:WR 20a
172:Gum 29
140:Carina
1798:Other
1713:Other
1588:Other
1425:WR 25
1420:WR 24
1415:WR 22
1333:Other
1324:97950
1319:95086
1314:93403
1309:93250
1304:93129
1299:85628
1294:65216
1284:53143
832:Bayer
823:Stars
596:S2CID
570:arXiv
511:arXiv
483:S2CID
457:arXiv
409:S2CID
381:arXiv
352:1 May
238:WR21a
51:epoch
48:J2000
1789:3059
1704:3586
1699:3584
1694:3582
1689:3581
1684:3579
1679:3576
1674:3199
1669:2867
1579:3603
1574:3532
1569:3324
1564:3293
1559:3114
1554:2808
1549:2516
1530:Star
1256:4222
1251:4205
1231:4142
1103:V906
1098:V817
1093:V816
1088:V759
1083:V752
1078:V742
1073:V640
1068:V602
1063:V560
1053:V528
1043:V518
1013:V372
983:V341
547:link
434:NASA
377:1504
354:2018
310:R136
106:10.5
93:6000
91:ly (
1782:NGC
1662:NGC
1541:NGC
713:doi
701:102
676:doi
635:doi
623:466
588:doi
566:555
529:doi
507:446
475:doi
453:463
399:doi
95:pc)
88:000
1897::
1276:HD
1113:HR
973:QZ
963:OY
958:IX
953:HR
948:GG
943:EV
938:CK
933:BO
928:AG
923:RT
753:-
711:.
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543:}}
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223:,
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150:,
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903:S
898:R
880:ω
875:χ
870:υ
860:θ
855:η
789:e
782:t
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249:M
199:L
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