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
A proposito dell'immagine
Identificazione: | eso9856d |
Tipo: | Osservazione |
Data di pubblicazione: | 26 Novembre 1998 |
Notizie relative: | eso9856 |
Dimensione: | 2872 x 2865 px |
A proposito delll'oggetto
Nome: | CL2244-02 |
Tipo: | Early Universe : Galaxy : Grouping : Cluster |
Distanza: | z=0.3 (redshift (spostamento verso il rosso)) |
Constellation: | Aquarius |
Categoria: | Galaxy Clusters |
Formati delle immagini
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
Banda | Lunghezza d'onda | Telescopio |
---|---|---|
Infrarosso Near-IR | 2.16 μm | Very Large Telescope ISAAC |
Ottico V | Very Large Telescope | |
Ottico R | Very Large Telescope |