A Realistic Cosmology Without Cold Dark Matter

TL;DR

This paper introduces a unified framework combining dark matter and MOND, explaining galactic dynamics and large-scale structure without cold dark matter, using a vector field to control environment-dependent behaviors.

Contribution

It presents a novel model that unifies CDM and MOND phenomena with a single mass scale, addressing their respective issues in galaxy and large-scale cosmology.

Findings

Dark matter clusters on large scales but not on galactic scales.

The vector field produces MOND effects in galaxies.

A single mass scale explains CDM, MOND, and dark energy phenomena.

Abstract

We propose a new framework unifying cold dark matter (CDM) and Modified Newtonian Dynamics (MOND) to solve their respective problems on galactic scales and large scale structure formation. In our framework the dark matter clusters on large scales but not on galactic scales. This environment dependence of the dark matter behaviors is controlled by a vector field, which also produces the MOND effects in galaxies. We find that in this framework only a single mass scale needs to be introduced to produce the phenomena of CDM, MOND and also dark energy.