The coherent motion of Cen A dwarf satellite galaxies remains a challenge for ΛCDM cosmology Oliver Müller, Marcel S. Pawlowski, Federico Lelli, Katja Fahrion, Marina Rejkuba, Michael Hilker, Jamie Kanehisa, Noam Libeskind and Helmut Jerjen A&A, 645 (2021) L5 Published online: 08 January 2021 DOI: 10.1051/0004-6361/202039973