Upper panel: ray-tracing movie of a 1.3 h ⁻¹ cMpc region using Splotch (Dolag et al. 2008). Shown is a composition of the hot gas (mostly visible in the central part, color coded by temperature) with the individual, shocked resolution elements color coded by their Mach number ﹩{ \mathcal M }﹩ (where blue, red, yellow, and white correspond to ﹩{ \mathcal M }\approx 2,3,4﹩ and >5, respectively). The animation is available in the online journal. It proceeds from z = 11.182 to 0.00. Lower panel: We show maps of a 200 h ⁻¹ ckpc thin slice of the IGM temperature distribution within a 2 h ⁻¹ cMpc wide region centered on the galaxy halo. The contours are drawn from the Mach number distribution along the line of sight and highlight the positions of various shock features. The position of the accretion shock is located toward the border of the shown maps (visible as transition from red to black), while the first and second internal shocks are located further in (mostly visible as transition from orange to red and yellow to orange in the left and middle panels). The middle panel shows all three shock features, the outer one and the two inner ones, very clearly. In the left panel the first internal shock and in the right panel the second internal shock resemble the size of the observed ORCs, having a diameter of ∼500 kpc. In the middle and right panels, two rings inside each other could potentially shine in radio, while in the left panel the geometry could be interpreted as two overlapping elliptical shapes. The images (from left to right) show the halo at z = 0.52, z = 0.43, and z = 0.27, respectively.

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.