Weak lensing probe of cubic Galileon model

TL;DR

This paper investigates how weak lensing statistics, specifically convergence power spectrum and bi-spectrum, can be used to detect signatures of the cubic Galileon model, a modified gravity theory explaining cosmic acceleration.

Contribution

It provides the first detailed analysis of the detectability of the cubic Galileon model using weak lensing convergence statistics compared to standard models.

Findings

Cubic Galileon model shows distinguishable signatures in weak lensing signals.

Convergence power spectrum and bi-spectrum can effectively differentiate the model from ΛCDM.

Results suggest potential for future surveys to test modified gravity theories.

Abstract

The cubic Galileon model containing the lowest non-trivial order action of the full Galileon action can produce the stable late-time cosmic acceleration. This model can have a significant role in the growth of structures. The signatures of the cubic Galileon model in the structure formation can be probed by the weak lensing statistics. Weak lensing convergence statistics is one of the strongest probes to the structure formation and hence it can probe the dark energy or modified theories of gravity models. In this work, we investigate the detectability of the cubic Galileon model from the $ \Lambda $CDM model or from the canonical quintessence model through the convergence power spectrum and bi-spectrum.