Testing Screening Mechanisms with Mass Profiles of Galaxy Clusters

TL;DR

This paper introduces MG-MAMPOSSt, a free code for analyzing galaxy cluster mass profiles to test modified gravity models, combining galaxy kinematics and lensing data, with focus on chameleon and Vainshtein screening mechanisms.

Contribution

The paper presents MG-MAMPOSSt, a new open-source tool for constraining modified gravity models using galaxy cluster data, including recent results and forecasts.

Findings

Effective reconstruction of cluster mass profiles with combined data.

Feasibility of testing screening mechanisms with upcoming surveys.

Insights into systematics affecting modified gravity constraints.

Abstract

We present \textsc{MG-MAMPOSSt}, a license-free code to constrain modified gravity models by reconstructing the mass profile of galaxy clusters with the kinematics of the cluster's member galaxies. We describe the main features of the code and we show the capability of the method when the kinematic information is combined with lensing data. We discuss recent results and forecasts on two classes of models currently implemented in the code, characterized by different screening mechanisms, namely, chameleon and Vainshtein screening. We further explore the impact of possible systematics in view of application to the data from upcoming surveys. This proceedings summarizes the results presented at the ALTECOSMOFUN workshop in September 2021.