Theory MOND in a Friedmann-Robertson-Walker Cosmology as alternative to the Nonbaryonic Dark Matter paradigm

TL;DR

This paper proposes a Yukawa-like scalar potential to connect Modified Newtonian Dynamics (MoND) with relativistic cosmology, potentially explaining galaxy rotation curves and large-scale structure without dark matter.

Contribution

It introduces a novel Yukawa-like potential into Friedmann equations, linking MoND to relativistic cosmology and addressing dark matter issues.

Findings

Critical density matches observed values without dark matter

MoND behavior emerges at interstellar scales

No impact on CMB predictions or nucleosynthesis

Abstract

Modified Newtonian Dynamics (MoND) is an empirically modification of Newtonian gravity at largest scales in order to explain rotation curves of galaxies, as an alternative to nonbaryonic dark matter. But MoND theories can hardly connect themselves to the formalism of relativistic cosmology type Friedmann-Robertson-Walker. The present work posits the possibility of building this connection by postulating a Yukawa-like scalar potential, with non gravitational origin. This potential comes from a simple reflection speculate of the well-know potential of Yukawa and it is intended to describe the following physics scenarios: null in very near solar system, slightly attractive in ranges of interstellar distances, very attractive in distance ranges comparable to galaxies cluster, and repulsive to cosmic scales. As a result of introducing this potential into the typical Friedman equations we found that the critical density of matter is consistent with the observed density (without a dark matter assumption), besides this, MoND theory is obtained for interstellar scales and consequently would explain rotation curves. Also it is shown that Yukawa type inverse does not alter the predictions of the Cosmic Microwave Background neither the primordial nucleosinthesys in early universe; and can be useful to explain the large-scale structure formation.