New probe of modified gravity

TL;DR

This paper proposes a new method to test modified gravity theories by examining deviations in the density-size relation of Dark Matter halos from the standard LambdaCDM predictions.

Contribution

It introduces an efficient approach to constrain large-scale modified gravity models through observational signatures in Dark Matter halo properties.

Findings

Modified gravity theories alter the density-size relation of Dark Matter halos.

The proposed method can effectively distinguish between Newtonian and modified gravity scenarios.

The approach provides a new observational test for theories beyond standard gravity.

Abstract

We suggest a new efficient way to constrain a certain class of large scale modifications of gravity. We show that the scale-free relation between density and size of Dark Matter halos, predicted within the LambdaCDM model with Newtonian gravity, gets modified in a wide class of theories of modified gravity.