Large-scale cosmic flows and moving dark energy

TL;DR

This paper explores how large-scale cosmic flows might indicate the presence of moving dark energy at photon decoupling, challenging standard cosmological models and linking CMB anisotropies to dark energy dynamics.

Contribution

It proposes that observed cosmic flows could be evidence of moving dark energy, offering a novel explanation for large-scale motions inconsistent with LCDM.

Findings

Detection of large-scale matter bulk flows at 100 and 300 Mpc/h.

Moving dark energy could explain the large flow amplitudes.

Possible connection between CMB dipole and quadrupole axes.

Abstract

Large-scale matter bulk flows with respect to the cosmic microwave background have very recently been detected on scales 100 Mpc/h and 300 Mpc/h by using two different techniques showing an excellent agreement in the motion direction. However, the unexpectedly large measured amplitudes are difficult to understand within the context of standard LCDM cosmology. In this work we show that the existence of such a flow could be signaling the presence of moving dark energy at the time when photons decoupled from matter. We also comment on the relation between the direction of the CMB dipole and the preferred axis observed in the quadrupole in this scenario.