Degeneracies in parametrized modified gravity models

TL;DR

This paper analyzes parameter degeneracies in modified gravity models and how future weak lensing surveys like LSST can help break these degeneracies, considering effects of neutrinos and systematics.

Contribution

It provides a detailed study of parameter degeneracies in popular modified gravity models and assesses the potential of LSST to resolve them.

Findings

Weak lensing observables can partially break degeneracies

Massive neutrinos and systematics influence parameter correlations

Future surveys improve constraints on modified gravity parameters

Abstract

We study degeneracies between parameters in some of the widely used parametrized modified gravity models. We investigate how different observables from a future photometric weak lensing survey such as LSST, correlate the effects of these parameters and to what extent the degeneracies are broken. We also study the impact of other degenerate effects, namely massive neutrinos and some of the weak lensing systematics, on the correlations.