Image showing the distribution of hot gas in the output of the Magneticum simulation (left) compared with the eROSITA X-ray image of the Abell 3391/95 system (right); (c) Reiprich et al., Astronomy & Astrophysics, DOI: 10.1051/0004-6361/202039590
Shown is a 15 megaparsec large region centered on the counterpart of the A3391/95 analog system from the Magneticum simulation. The different lines show how material within the two clusters (red and gold) and the bridge (blue) in between was assembled within the last ten billion years. (c) V. Biffi and K. Dolag (LMU). [click to see an animation of the image]