Anisotropic Hubble expansion of large scale structures
Henri-Hugues Fliche (LMMT), Jean-Marie Souriau (CPT), Roland Triay, (CPT)
TL;DR
This paper studies the large-scale motion of galaxies in the universe, focusing on anisotropic expansion and velocity fields, to better understand cosmic flows and structures like the Local Super Cluster.
Contribution
It introduces solutions to the Euler-Poisson equations that model anisotropic and rotational galaxy motions, highlighting non-potential velocity fields in cosmic structures.
Findings
Identification of planar kinematics with rotational distortion
Presence of non-potential velocity fields in large-scale structures
Insights into bulk flows within the Local Super Cluster
Abstract
We investigate the dynamics of an homogenous distribution of galaxies moving under the cosmological expansion through Euler-Poisson equations system. The solutions are interpreted with the aim of understanding the cosmic velocity fields in the Local Super Cluster, and in particular the presence of a bulk flow. Among several solutions, we shows a planar kinematics with constant (eternal) and rotational distortion, the velocity field is not potential.
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