Testing the Copernican principle with future radio-astronomy observations

TL;DR

This paper proposes a method to test the Copernican principle using future radio-astronomy data, emphasizing the measurement of transverse derivatives without prior cosmological constant knowledge.

Contribution

It introduces a direct observational approach to test the Copernican principle with upcoming radio surveys, highlighting the significance of transverse derivative measurements.

Findings

Transverse derivatives are crucial for testing the principle.

Future radio surveys can provide the necessary data.

Prior knowledge of the cosmological constant is not required.

Abstract

We use a direct observational approach to investigate the possibility of testing the Copernican principle with data from upcoming radio surveys. In particular we illustrate the importance of measuring derivatives transverse to the past light-cone when prior knowledge of the value of the cosmological constant is not available.