Fig. 21.
Coma cluster maps. Shown is the 0.5 to 2.0 keV X-ray surface brightness with contours (log cts s−1 per 1.6 arcsec pixel; top left), fractional difference of surface brightness to radial average (top right), temperature (keV; centre left), metallicity (Z⊙; centre right), velocity relative to NGC 4889 (km s−1; bottom left) and 1σ statistical uncertainty on velocity (km s−1; bottom right). Spectral results were obtained from spectra extracted from a sliding 4 arcmin radius extraction region (circle) over a grid. Regions where the uncertainty on the temperature is >1 keV, metallicity >0.07 Z⊙ or velocity >600 km s−1 are not shown. The position of the four central lensing-map peaks of Okabe et al. (2010) are indicated by squares.
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