Galaxy cluster CL2244-02 with gravitational arcs

The image is a colour composite image of the galaxy cluster CL2244-02 (redshift z = 0.3), combining a 20 min jittered ISAAC Ks (2.16µm) exposure with 15 min V (green-yellow) and R (red) exposures, obtained with the VLT Test Camera at the UT1 Nasmyth focus. In addition to the prominent blue arc, produced by gravitational lensing of a galaxy at redshift z = 2.24, there are also notable, very red arcs, both closer to the centre and further out. They were only detected in the infrared image and are probably due to lensing of a much more distant galaxy.

Crediti:

ESO

Riguardo l'immagine

Identificazione:eso9856d
Tipo:Osservazione
Data di rilascio:26 Novembre 1998
Notizie relative:eso9856
Grandezza:2872 x 2865 px

Riguardo all'oggetto

Nome:CL2244-02
Tipo:Early Universe : Galaxy : Grouping : Cluster
Distanza:z=0.3 (spostamento del rosso)
Constellation:Aquarius
Categoria:Galaxy Clusters

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Coordinate

Position (RA):22 47 12.10
Position (Dec):-2° 5' 44.96"
Field of view:1.37 x 1.37 arcminutes
Orientazione:Il Nord è a 37.4° a sinistra della verticale

Colori e filtri

BandaLunghezza d'ondaTelescopio
Infrarosso
Near-IR
2.16 μmVery Large Telescope
ISAAC
Ottico
V
Very Large Telescope
Ottico
R
Very Large Telescope