Enlightening the dark ages with dark matter

Understand

Constraints on dark matter annihilation or decay offer unique insights into the nature of dark matter.

• We illustrate how surveys dedicated to detect the highly redshifted 21 cm signal from the dark ages will offer a new window into properties of particle dark matter.
• The 21 cm intensity mapping signal and its fluctuations are sensitive to energy injection from annihilation or decay of long-lived particles in a way that is complementary to other probes.
• We present forecasted constraints from forthcoming and next-generation radio surveys.