Testing Modified Gravity (MOG) with gas-dominated galaxies

TL;DR

This paper compares Modified Gravity (MOG) and MOND theories against observational data from gas-rich galaxies to evaluate their predictions of the Tully-Fisher relationship, highlighting potential for future tests.

Contribution

It provides an empirical comparison of MOG and MOND predictions with observational data, suggesting future observations could differentiate these theories.

Findings

Both theories agree well with current data.

Gas-rich galaxies are promising for testing gravity theories.

Future observations may distinguish between MOG and MOND.

Abstract

We compare the MOG and MOND predictions of the Tully-Fisher relationship to observations using gas-rich galaxies for which the baryonic mass can be estimated accurately. We find that both theories are in good agreement with the data. Future observations of large, gas-rich galaxies may offer a means to distinguish between these two theories.