XMM-Newton/EPIC continuum-subtracted Fe Kα emission line maps of the Arches cluster region at 6.4 keV (left panel) and 6.7 keV (right panel). The images have been adaptively smoothed at a signal-to-noise of 20. The magenta circle indicates the region (“Cluster”) used to characterize the Arches cluster X-ray emission, which shows strong Fe Kα emission at 6.7 keV. The region inside the white ellipse but outside the magenta circle indicates the region (“Cloud”) used for spectral extraction to characterize the bright 6.4 keV regions surrounding the Arches cluster. The region inside the yellow circle but outside the two dashed ellipses shows the local background used for the spectral analysis. The axes of the maps (in green) indicate Galactic coordinates in degrees. North is up and east to the left.