A Multi-messenger view of Cosmic Dawn: Conquering the Final Frontier

Understand

The epoch of Cosmic Dawn, when the first stars and galaxies were born, is widely considered the final frontier of observational cosmology today.

• Mapping the period between Cosmic Dawn and the present-day provides access to more than 90% of the baryonic (normal) matter in the Universe, and unlocks several thousand times more Fourier modes of information than available in today's cosmological surveys.
• We review the progress in modelling baryonic gas observations as tracers of the cosmological large-scale structure from Cosmic Dawn to the present day.
• We illustrate how the description of dark matter haloes can be extended to describe baryonic gas abundances and clustering.