The star cluster Terzan 5

Peering through the thick dust clouds of our galaxy's central parts (the "bulge") with an amazing amount of detail, a team of astronomers has revealed an unusual mix of stars in the stellar grouping known as Terzan 5. Never observed anywhere in the bulge before, this peculiar cocktail of stars suggests that Terzan 5 is in fact one of the bulge's primordial building blocks, most likely the relic of a dwarf galaxy that merged with the Milky Way during its very early days.

This near-infrared image was obtained with the Multi-conjugate Adaptive Optics Demonstrator (MAD) instrument on ESO's Very Large Telescope. Observations in two bands (J and K) were combined. The field of view is 40 arcseconds across.

Crediti:

ESO/F. Ferraro

Riguardo l'immagine

Identificazione:eso0945a
Tipo:Osservazione
Data di rilascio:Mercoledì 25 Novembre 2009 12:00
Notizie relative:eso0945
Grandezza:1355 x 1373 px

Riguardo all'oggetto

Nome:Terzan 5
Tipo:Milky Way : Star : Grouping : Cluster
Distanza:25000 Anni luce
Constellation:Sagittarius
Categoria:Star Clusters

Formati delle immagini

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Coordinate

Position (RA):17 48 4.43
Position (Dec):-24° 46' 48.24"
Field of view:0.63 x 0.64 arcminutes
Orientazione:Il Nord è a 179.8° a destra della verticale

Colori e filtri

BandaLunghezza d'ondaTelescopio
Infrarosso
J
1.1 μmVery Large Telescope
MAD
Infrarosso
Pseudogreen (J+K)
Very Large Telescope
MAD
Infrarosso
K
2.2 μmVery Large Telescope
MAD

 

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