Composite X-ray and optical image of the high-redshift galaxy cluster SPT-CL J2342-5411, with contours depicting the region of the Sunyaev-Zel'dovich effect signature
Date: 31 May 2010
Satellite: XMM-Newton
Copyright: ESA/XMM-Newton; Background image: Blanco Cosmology Survey/NOAO/AURA/NSF; SZE contours: South Pole Telescope/NSF
X-ray emission (in pink) along with Sunyaev-Zel'dovich effect (SZE) contours (in white) of the high-redshift galaxy cluster SPT-CL J2342-5411, overlaid on an optical g-, r- and i-band colour composite image.
The X-ray observations have been performed using XMM-Newton's new mosaic observing mode. The X-ray emission shown in the image corresponds to the 0.5-2.0 keV band.
The SZE contours, from the South Pole Telescope galaxy cluster catalogue, are overlaid on an optical pseudo-colour image from the Blanco Cosmology Survey.
The cluster has a mass of about 3x10^14 solar masses, a temperature of about 4.5 keV (= 52 million Kelvin) and is located at redshift z=1.08.
This composite image clearly show a large 'Brightest Cluster Galaxy'(BCG) within a few arc seconds from the peak of the X-ray emission; the SZE detection is also coincident with the observation in the other bands.
The region depicted above is 4.8 x 4.8 arc minutes.
