# Testing Newton/GR, MoND and quantised inertia on wide binaries

## TL;DR

This paper evaluates different gravity models on wide binary stars, finding that Newtonian/GR and MoND models fail, but quantised inertia successfully predicts their dynamics without adjustable parameters.

## Contribution

It demonstrates that quantised inertia can explain wide binary star dynamics, unlike Newtonian/GR and MoND, without requiring adjustable parameters.

## Key findings

- Newtonian/GR models cannot predict wide binary dynamics.
- MoND cannot predict wide binary systems.
- Quantised inertia successfully predicts wide binary behavior.

## Abstract

Wide binary stars are within the low-acceleration regime in which galactic rotation curves deviate from Newtonian or general relativistic predictions. It has recently been observed that their rotation rates are similarly anomalous in a way that dark matter cannot explain, since it must be smooth on these small scales to fit galaxy rotation curves. Here, it is shown that Newtonian/GR models cannot predict these wide binaries since dark matter cannot be applied. It is also shown that MoND cannot predict these systems. However, a model which assumes that inertia is due to Unruh radiation made inhomogeneous in space by relativistic horizons (QI, quantised inertia) can predict these wide binaries, and it has the advantage of not needing an adjustable parameter.