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Astro2020 Science White Paper: Insights Into the Epoch of Reionization with the Highly-Redshifted 21-cm Line

Furlanetto, Steven and Doré, Olivier (2019) Astro2020 Science White Paper: Insights Into the Epoch of Reionization with the Highly-Redshifted 21-cm Line. Astro2020 Science White Paper, . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20191001-105329604

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Abstract

The epoch of reionization, when photons from early galaxies ionized the intergalactic medium about a billion years after the Big Bang, is the last major phase transition in the Universe's history. Measuring the characteristics of the transition is important for understanding early galaxies and the cosmic web and for modeling dwarf galaxies in the later Universe. But such measurements require probes of the intergalactic medium itself. Here we describe how the 21-cm line of neutral hydrogen provides a powerful probe of the reionization process and therefore important constraints on both the galaxies and intergalactic absorbers at that time. While existing experiments will make precise statistical measurements over the next decade, we argue that improved 21-cm analysis techniques - allowing imaging of the neutral gas itself - as well as improved theoretical models, are crucial for testing our understanding of this important era.


Item Type:Report or Paper (White Paper)
Related URLs:
URLURL TypeDescription
https://arxiv.org/abs/1903.06204arXivDiscussion Paper
ORCID:
AuthorORCID
Furlanetto, Steven0000-0002-0658-1243
Doré, Olivier0000-0002-5009-7563
Series Name:Astro2020 Science White Paper
Record Number:CaltechAUTHORS:20191001-105329604
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20191001-105329604
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98986
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Oct 2019 18:02
Last Modified:03 Oct 2019 21:46

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