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Cl Westerlund 1 (13,960 of 18,816)

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Cl Westerlund 1

Cl Westerlund 1, C 1644-457

RA: 16h 47m 4s
Dec: −45° 50′ 36″

Con: Ara
Ch: MSA:1481, U2:407, SA:22

Ref: Archinal&Hynes (2003)

(reference key)

Type: open cluster, 41p

Mag: B=?, V=14.5

Size: 3′
PA: ?

Published comments

Sher

Sher, D. () "Structure of the Milky Way in Carina" QJRAS, v 6, p 299-320.

"Westerlund 1 is a very small cluster in the midst of an association of young stars and some very heavily obscured nebulosity."

Kothes, R. & Dougherty, S.M. (2007)

"The distance and neutral environment of the massive stellar cluster Westerlund 1". A&A, 468, 993-1000; arXiv:0704.3073

Massive, compact, highly-reddened stellar cluster with a large population of post-MS massive stars, including OB supergiants and hypergiants, red and yellow supergiants, and (24 known) Wolf-Rayet stars. Its mass is likely to be in excess of 10E5 solar, exceeding that of any of the other known massive Galactic clusters, including NGC 3603, the Arches, and Quintuplet, and is more comparable to the mass of Super Star Clusters (SSC), previously identified only in other galaxies.

The derive a distance of 3.9 +/- 0.7 kpc, "consistent with a location in the Scutum-Crux Arm."

ESO press release 1034

Westerlund 1's magnetar: Challenging black hole theories

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