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The coherent motion of Cen A dwarf satellite galaxies remains a challenge for ΛcDM cosmology

Muller, Oliver; Pawlowski, Marcel S.; Lelli, Federico; Fahrion, Katja; Rejkuba, Marina; Hilker, M.; Kanehisa, Jamie; Libeskind, Noam; Jerjen, Helmut


The plane-of-satellites problem is one of the most severe small-scale challenges for the standard Λ cold dark matter (ΛCDM) cosmological model: Several dwarf galaxies around the Milky Way and Andromeda co-orbit in thin, planar structures. A similar case has been identified around the nearby elliptical galaxy Centaurus A (Cen A). In this Letter, we study the satellite system of Cen A, adding twelve new galaxies with line-of-sight velocities from VLT/MUSE observations. We find that 21 out of 28...[Show more]

CollectionsANU Research Publications
Date published: 2021-01-08
Type: Journal article
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/202039973
Access Rights: Open Access


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