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Cosmological Signals from Neutral Hydrogen: The 21-cm Line

Hot Big Bang Cosmology → Future Radio Arrays: SKA and Beyond

This advanced graduate-level path systematically develops the physics and observational techniques needed to understand the cosmological 21-cm signal from neutral hydrogen. It covers the atomic physics of the hyperfine transition, the spin temperature and radiative transfer, the power spectrum as a statistical probe, the astrophysics of the Dark Ages and Epoch of Reionization, and the practical challenges of detection including foreground removal and upcoming radio arrays like SKA.

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11 steps · 11 nodes · 3 stages

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11 steps · 3 stages. Click any step to inspect it and see it on the Path Map.

Stage 1

Foundation

4 steps

Stage 2

Core Concepts

4 steps

Stage 3

Advanced Topics

3 steps

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