Cosmology with 21cm intensity mapping

TL;DR

This paper explores the potential of 21cm intensity mapping as a novel cosmological probe to distinguish between dark energy and dark matter models through their unique effects on the 21cm signal, supported by telescope forecasts.

Contribution

It introduces the use of 21cm intensity mapping to differentiate dark energy and dark matter models, providing realistic forecasts for future radio telescope observations.

Findings

Distinctive effects of dark energy and dark matter models on 21cm signal

Forecasts show these models can be distinguished with upcoming radio telescopes

Highlights the potential of 21cm intensity mapping in cosmology

Abstract

The nature of the most abundant components of the Universe, dark energy and dark matter, is still to be uncovered. I tackle this subject considering a novel cosmological probe: the neutral hydrogen emitted 21cm radiation, observed with the intensity mapping technique. I analyse competitive and realistic dark energy and dark matter models and show how they produce distinctive and detectable effects on the 21cm signal. Moreover, I provide radio telescope forecasts showing how these models will be distinguishable in an unprecedented way.