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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.
Crédit:ESO
À propos de l'image
| Identification: | eso9856d |
| Type: | Observation |
| Date de publication: | 26 novembre 1998 |
| Communiqués de presse en rapport: | eso9856 |
| Taille: | 2872 x 2865 px |
À propos de l'objet
| Nom: | CL2244-02 |
| Type: | Early Universe : Galaxy : Grouping : Cluster |
| Distance: | z=0.3 (redshift) |
| Constellation: | Aquarius |
| Catégorie: | Galaxy Clusters |
Fonds d'écran
Coordinates
| Position (RA): | 22 47 12.10 |
| Position (Dec): | -2° 5' 44.96" |
| Field of view: | 1.37 x 1.37 arcminutes |
| Orientation: | North is 37.4° left of vertical |
Visualiser avec WorldWide Telescope:
Couleurs & filtres
| Domaine | Longueur d'onde | Télescope |
|---|---|---|
| Infrarouge Near-IR | 2.16 μm | Very Large Telescope ISAAC |
| Visible V | Very Large Telescope | |
| Visible R | Very Large Telescope |