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.

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ESO

Om bilden

ID:eso1034b
Typ:Observation
Publiceringsdatum:18 augusti 2010 12:00
Relaterade pressmeddelanden:eso1034
Storlek:1261 x 1261 px

Om objektet

Namn:Westerlund 1
Typ:Milky Way : Star : Evolutionary Stage : Neutron Star : Magnetar
Milky Way : Star : Grouping : Cluster
Avstånd:15000 ljusår
Constellation:Ara
Kategori:Star Clusters

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Koordinater

Position (RA):16 47 4.02
Position (Dec):-45° 51' 5.46"
Field of view:5.00 x 5.00 arcminutes
Orientering:Nord är 0.1° höger om lodrätt

Färger och filter

BandTeleskop
Synligt ljus
B
MPG/ESO 2.2-metre telescope
WFI
Synligt ljus
V
MPG/ESO 2.2-metre telescope
WFI
Synligt ljus
R
MPG/ESO 2.2-metre telescope
WFI

 

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