MOND virial theorem applied to a galaxy cluster

TL;DR

This paper applies MOND to derive a new expression for the mass-to-light ratio in galaxy clusters, showing that modified gravity can significantly reduce the inferred dark matter content.

Contribution

It introduces a MOND-based formula for the mass-to-light ratio in spherical systems, providing an alternative to dark matter explanations.

Findings

MOND reduces the mass-to-light ratio in the COMA cluster

Modified gravity can account for galaxy cluster dynamics without dark matter

The approach offers a new perspective on mass estimates in astrophysics

Abstract

Large values for the mass-to-light ratio (") in self-gravitating systems is one of the most important evidences of dark matter. We propose a expression for the mass-to-light ratio in spherical systems using MOND. Results for the COMA cluster reveal that a modification of the gravity, as proposed by MOND, can reduce significantly this value.