Evropská jižní observatoř

Kategorie: Kupy galaxií, Zpět na celou fotogalerii.

Popis (v anglickém jazyce):

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.

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