More Evidence for an Oscillation Superimposed on the Hubble Flow

TL;DR

This paper provides evidence for a sinusoidal oscillation superimposed on the Hubble flow, observed in velocity and density clumping of Type Ia supernovae, with implications for understanding cosmic structure and velocity patterns.

Contribution

The study demonstrates the presence of a consistent oscillation in both velocity and density data, and identifies an additional weaker velocity oscillation, advancing understanding of cosmic oscillatory phenomena.

Findings

Oscillation wavelength ~40 Mpc in velocity data

Oscillation also present in density clumping in phase quadrature

Evidence for an additional weaker velocity oscillation

Abstract

In a recent investigation evidence was presented for a low-level sinusoidal oscillation superimposed on top of the Hubble flow. This oscillation was in V$_{CMB}$, in a sample of type Ia Supernovae sources with accurate distances, and it was found to have a wavelength close to 40 Mpc. It became easily visible after the removal of several previously identified discrete velocity components. Its amplitude like that of the Hubble velocity showed an increase with distance, as would be expected for a constant-amplitude space oscillation. Here we report that this oscillation is also present in distance clumping in these sources, with the same wavelength, but in phase quadrature. The discrete velocity components do not play a role in detecting the distance clumping wavelength. Assuming that time proceeds from high cosmological redshift to low, the blue-shifted velocity peaks, which represent the contraction stage of the velocity oscillation, then lead the density peaks. With the discrete velocity components removed we also find evidence for at least one other, weaker velocity oscillation. It is found to have a wavelength similar to one reported in density clumping by previous investigators. In those cases the source samples were much larger.