Bright X-Ray Cluster Acts As Strong Gravitational Lens

This is an optical image of the most luminous ROSAT cluster of galaxies RXJ1347.5-1145, obtained with the MPG/ESO 2.2-metre telescope at the La Silla Observatory. The image shows the central part of the cluster with two bright gravitational arcs.

The arcs are 5 - 6 arcseconds long and located about 35 arcseconds to the North-East and South-West of the brightest galaxies in the cluster. They were detected on exposures of only 3 minutes duration with the 2.2-metre telescope and are among the brightest such arcs ever found.

At the distance of the cluster, approx. 5,000 million light-years, the arcs are situated at a projected distance of about 500,000 light-years from the centre of the cluster. It is an interesting possibility that the two arcs may in fact be two images of the same, very distant galaxy, that is situated far beyond RXJ1347.5-1145 and whose light has been bent and split by this cluster's strong gravitational field.

Credit:

ESO

Bookmark and Share

About the Image

Id:eso9509a
Type:Observation
Release date:19 June 1995
Related releases:eso9509
Size:600 x 608 px

About the Object

Name:RXJ1347.5-1145
Type:• Early Universe : Galaxy : Type : Gravitationally Lensed
• Early Universe : Galaxy : Grouping : Cluster
• X - Galaxy Clusters
• X - Galaxies
• X - Cosmology
Distance:z=0.451 (redshift)

Image Formats

Large JPEG
88.5 KB
Screensize JPEG
135.1 KB

Wallpapers

1024x768
136.6 KB
1280x1024
193.1 KB
1600x1200
233.5 KB
1920x1200
261.9 KB
2048x1536
326.7 KB

Colours & filters

BandTelescope
Optical MPG/ESO 2.2-metre telescope
WFI

Also see our