Moffat's Modified Gravity tested on X-COP galaxy clusters

TL;DR

This paper tests Moffat's Modified Gravity (MOG) against galaxy cluster data from X-COP, using X-ray and SZ observations to estimate key parameters and compare with predictions of the theory.

Contribution

It applies MOG to real galaxy cluster data, estimating its parameters and assessing its viability as an alternative to General Relativity.

Findings

MOG parameters $oldsymbol{\alpha}$ and $oldsymbol{\mu}$ are constrained by observational data.

The reconstructed cluster mass profiles are consistent with MOG predictions.

Results provide insights into the validity of MOG in describing large-scale structures.

Abstract

Scalar Tensor Vector Gravity(STVG) is a fully covariant Lorentz invariant alternative theory of gravity also called as MOdified Gravity(MOG) which modifies General Relativity(GR) with dynamical massive vector field and scalar fields. In STVG the mass $\mu$ of the vector field $\phi$ and the Universal gravitational constant G enjoys the status of a dynamical field. We use the reconstructed total cluster mass obtained from X-ray observations by XMM-Newton telescope in combination with the Sunyaev-Zel'dovich(SZ) effect observed within Planck all-sky survey to estimate the parameters $ \alpha$ and $\mu$ with modified cluster mass in MOG.