# On the gravitational instability in the Newtonian limit of MOG

## TL;DR

This paper derives analytical cosmological solutions within Modified Gravity (MOG) and compares the evolution of perturbations across different epochs to those predicted by General Relativity, highlighting differences in gravitational behavior.

## Contribution

It provides new analytical solutions in MOG and analyzes cosmological perturbations in the Newtonian limit, offering insights into alternative gravity models.

## Key findings

- MOG solutions describe various universe epochs
- Perturbation evolution in MOG differs from GR
- Comparison highlights potential observational differences

## Abstract

We have found some analytical cosmological solutions to MOdified Gravity (MOG). These solutions describe different evolutionary epochs of an isotropic and homogeneous universe. During each epoch, the evolution of cosmological perturbation is studied in the Newtonian framework and compared with the corresponding results of GR.