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.
Kredit:ESO
O snímku
Id: | eso9856d |
Typ: | Pozorování |
Datum zveřejnění: | 26. listopadu 1998 |
Související články: | eso9856 |
Velikost: | 2872 x 2865 px |
O objektu
Jméno: | CL2244-02 |
Typ: | Early Universe : Galaxy : Grouping : Cluster |
Vzdálenost: | z=0.3 (rudý posuv) |
Constellation: | Aquarius |
Kategorie: | Galaxy Clusters |
Souřadnice
Position (RA): | 22 47 12.10 |
Position (Dec): | -2° 5' 44.96" |
Field of view: | 1.37 x 1.37 arcminutes |
Orientace: | Sever je 37.4° levá od svislé osy |
Barvy & filtry
Pásmo | Vlnová délka | Dalekohled |
---|---|---|
Infračervený Near-IR | 2.16 μm | Very Large Telescope ISAAC |
Optický V | Very Large Telescope | |
Optický R | Very Large Telescope |