Center of Merging Galaxy System ESO202-G23
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Center of Merging Galaxy System ESO202-G23

April 28, 2005
This photo is a colour composite image of the merging galaxy system ESO202-G23 made by combining an ISAAC H (1.65µm) exposure with (blue) and R (red) exposures made with the VLT Test Camera at Nasmyth focus. At least one of the two nuclei is obviously an Active Galaxy Nucleus (AGN) whose partially collimated ultraviolet radiation is exciting the surrounding gas to the North. Also visible is a blue star-forming complex to the South of the centre and a complicated pattern of gas emission due to the combination of arms resulting from the merger, as well as heavy dust extinction. Of additional interest is the arc of very red objects in the lower part of the image which are more distant galaxies.

Technical Information:Exposure times in the H, B and R filters were 1200, 1800 and 900 seconds, respectively. The field measures about 1.5 x 1.5 arcmin, with N at the top left and East at the lower left corner. The seeing was about 0.4 arcsec.

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