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.
Źródło:ESO
O zdjęciu
Identyfikator: | eso9856d |
Typ: | Obserwacje |
Data publikacji: | 26 listopada 1998 |
Powiązane komunikaty: | eso9856 |
Rozmiar: | 2872 x 2865 px |
O obiekcie
Nazwa: | CL2244-02 |
Typ: | Early Universe : Galaxy : Grouping : Cluster |
Odległość: | z=0.3 (redshift) |
Constellation: | Aquarius |
Kategoria: | Galaxy Clusters |
Współrzędne
Pozycja (RA): | 22 47 12.10 |
Pozycja (Dec): | -2° 5' 44.96" |
Pole widzenia: | 1.37 x 1.37 arcminutes |
Orientacja: | North is 37.4° lewo of vertical |
Kolory i filtry
Pasmo | Długość fali | Teleskop |
---|---|---|
Podczerwony Near-IR | 2.16 μm | Very Large Telescope ISAAC |
Optyczny V | Very Large Telescope | |
Optyczny R | Very Large Telescope |