Galactic orbital motions in the Dark Matter, MOdified Newtonian Dynamics and MOdified Gravity scenarios

TL;DR

This study numerically compares the orbital motions of the Magellanic Clouds under Dark Matter, Modified Newtonian Dynamics, and Modified Gravity theories over a billion-year timescale to assess their distinguishability.

Contribution

It provides a comparative numerical analysis of orbital trajectories in different gravity models to evaluate potential observational discriminators.

Findings

Orbital motions differ significantly among the models.

Potential to distinguish models based on orbital dynamics.

Numerical integration over 1 Gyr highlights model-specific behaviors.

Abstract

We simultaneously integrate in a numerical way the equations of motion of both the Magellanic Clouds (MCs) in MOND, MOG and CDM for -1 <= t <= +1 Gyr to see if, at least in principle, it is possible to discriminate between them (Abridged version).