Wide Field Imager image of Westerlund 1 (annotated)

This image of the young star cluster Westerlund 1 was taken with the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESO’s La Silla Observatory in Chile. This remarkable cluster contains hundreds of very massive stars, some shining with a brilliance of almost one million suns. Although most stars in the cluster are hot blue supergiants, they appear reddish in this image as they are seen through interstellar dust and gas. European astronomers have for the first time demonstrated that the magnetar — an unusual type of neutron star with an extremely strong magnetic field — that lies in the cluster was formed from a star with at least 40 times as much mass as the Sun. The result presents great challenges to current theories of how stars evolve, as a star as massive as this was expected to become a black hole, not a magnetar.



À propos de l'image

Date de publication:18 août 2010 12:00
Communiqués de presse en rapport:eso1034
Taille:1261 x 1261 px

À propos de l'objet

Nom:Westerlund 1
Type:Milky Way : Star : Evolutionary Stage : Neutron Star : Magnetar
Milky Way : Star : Grouping : Cluster
Distance:15000 années lumière
Catégorie:Star Clusters

Image Formats

Grand JPEG
424,6 Kio
JPEG taille écran
240,1 Kio


Fonds d'écran

233,1 Kio
342,5 Kio
477,4 Kio
559,0 Kio
734,0 Kio


Position (RA):16 47 4.02
Position (Dec):-45° 51' 5.46"
Field of view:5.00 x 5.00 arcminutes
Orientation:North is 0.1° right of vertical


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