Tempestuous life beyond R500: X-ray view on the Coma cluster with SRG/eROSITA - I. X-ray morphology, recent merger, and radio halo connectionE. Churazov, I. Khabibullin, N. Lyskova, R. Sunyaev and A. M. BykovA&A, 651 (2021) A41DOI: https://doi.org/10.1051/0004-6361/202040197