Why is the Hubble flow so quiet?

TL;DR

The paper proposes that the uniformity and quietness of the Hubble flow are due to the dominant influence of the cosmological vacuum, which dynamically controls cosmic matter flow and explains its regularity.

Contribution

It introduces the idea that the cosmological vacuum governs the Hubble flow's uniformity and quietness, offering a new perspective on cosmic flow dynamics.

Findings

The Hubble flow's regularity is linked to the dominance of the cosmological vacuum.

The flow's kinematical identity persists across large cosmic scales.

A conjecture of cosmological intermittency is proposed to explain initial perturbations.

Abstract

The cosmological vacuum, which is perfectly uniform, dominates by density over all the forms of cosmic matter. It makes the Universe be actually more uniform than it could be seen from the visible picture of the highly non-uniform matter distribution, especially inside the observed cell of uniformity (100-150 Mpc). This uniformity reveals itself in the structure of the Hubble matter flow which extends over a giant range of cosmic space scales -- from few Mpc to a thousand Mpc, -- preserving its kinematical identity. According to Sandage (1999), this flow is mysteriously regular and quiet even deep inside the cell of uniformity. An answer we propose to the question in the title above is as follows: This is most probably because the flow is dynamically controlled by the cosmological vacuum. An additional conjecture of cosmological intermittency, that addresses a complex statistical structure of initial chaotic perturbations, is also suggested in this context.