Cold Dark Matter with MOND Scaling

TL;DR

This paper proposes a holographic duality linking cold dark matter and MOND, introducing MONDian dark matter that behaves as CDM on large scales and as MOND on galactic scales, with potential phenomenological implications.

Contribution

It introduces a novel duality framework connecting dark matter and modified gravity, and conceptualizes MONDian dark matter with scale-dependent behavior.

Findings

MONDian dark matter acts as CDM on cosmological scales.

At galactic scales, MONDian dark matter reproduces MOND phenomenology.

The approach offers a new perspective on galaxy rotation curves and dark matter.

Abstract

We provide a holographic dual description of Milgrom's scaling associated with galactic rotation curves. Our argument is based on the recent entropic reinterpretation of Newton's laws of motion. We propose a duality between cold dark matter and modified Newtonian dynamics (MOND). We introduce the concept of MONDian dark matter, and discuss some of its phenomenological implications. At cluster as well as cosmological scales, the MONDian dark matter would behave as cold dark matter, but at the galactic scale, the MONDian dark matter would act as MOND.