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A whirling plane of satellite galaxies around Centaurus A challenges CDM cosmology

Published online by Cambridge University Press:  30 October 2019

Oliver Müller Open the ORCID record for Oliver Müller [Opens in a new window]
Oliver Müller*
Affiliation:
Departement Physik, Universität Basel, Klingelbergstr. 82, CH-4056 Basel, Switzerland email: [email protected]
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Abstract

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The phase-space correlation of dwarf galaxies around the Milky Way and the Andromeda galaxy pose a serious challenge to our understanding of structure formation. Recently, another planar structure was discovered around Cen A, the major galaxy of the Centaurus group. We have surveyed this galaxy group for new dwarf galaxies and presented the discovery of 57 new dwarf member candidates. Furthermore, we have studied the kinematics of previously known dwarfs and again found a kinematic coherence in their movement, similar to the Local Group satellites. In CDM simulations, such an alignment appears in less than 0.5 percent.

Keywords

galaxies: dwarfgalaxies: kinematics and dynamics(cosmology:) large-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 473 - 476
Copyright
© International Astronomical Union 2019 

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