Dark energy, gravitation and the Copernican principle

TL;DR

This paper explores how cosmic acceleration relates to gravitation theories and foundational cosmological assumptions, emphasizing the potential of current data to test these fundamental hypotheses beyond parameter estimation.

Contribution

It discusses the capacity of cosmological data to test core assumptions like general relativity and the Copernican principle, highlighting their importance in cosmological modeling.

Findings

Cosmological data can test fundamental hypotheses beyond parameter measurements.

The validity of general relativity on astrophysical scales is subject to observational testing.

The Copernican principle's role in cosmological models can be scrutinized with current data.

Abstract

This text aims at discussing the relations between the cosmic acceleration and the theory of gravitation and more generally with the hypotheses underlying the construction of our cosmological model, such as the validity of general relativity on astrophysical scales and the Copernican principle. We hope to illustrate that cosmological data have now the potential of testing these hypotheses, which go beyond the measurements of its parameters.