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.
Källa:ESO
Om bilden
ID: | eso9856d |
Typ: | Observation |
Publiceringsdatum: | 26 november 1998 |
Relaterade pressmeddelanden: | eso9856 |
Storlek: | 2872 x 2865 px |
Om objektet
Namn: | CL2244-02 |
Typ: | Early Universe : Galaxy : Grouping : Cluster |
Avstånd: | z=0.3 (rödförskjutning) |
Constellation: | Aquarius |
Kategori: | Galaxy Clusters |
Skrivbordsunderlägg
Koordinater
Position (RA): | 22 47 12.10 |
Position (Dec): | -2° 5' 44.96" |
Field of view: | 1.37 x 1.37 arcminutes |
Orientering: | Nord är 37.4° vänster om lodrätt |
Färger och filter
Band | Våglängd | Teleskop |
---|---|---|
Infrarött Near-IR | 2.16 μm | Very Large Telescope ISAAC |
Synligt ljus V | Very Large Telescope | |
Synligt ljus R | Very Large Telescope |