Hubble tension vs two flows

TL;DR

This paper proposes a modified weak-field General Relativity approach with the cosmological constant to resolve the Hubble tension, unifying dark matter dynamics and cosmic acceleration without free parameters.

Contribution

It introduces a parameter-free, unified framework within modified gravity to explain both local and global Hubble constants, aligning with galaxy dark matter data.

Findings

Compatible dark matter data with the unified model

Potential for future surveys to test the dark sector hypothesis

Resolution of Hubble tension without free parameters

Abstract

The Hubble tension is shown to be solvable, without any free parameter, conceptually and quantitatively, within the approach of modified weak-field General Relativity involving the cosmological constant $\Lambda$. That approach enables one to describe in a unified picture both the dynamics of dark matter containing galaxies and the accelerated expansion of the Universe, thus defining a {\it local} Hubble constant of a local flow and the {\it global} one. The data on the dark matter content of peculiar galaxy samples are shown to be compatible to that unified picture. Future more refined surveys of galaxy distribution, hierarchical dynamics and flows within the vicinity of the Local group and the Virgo supercluster can be decisive in revealing the possible common nature of the dark sector.