The Cosmic 21-cm Revolution: Charting the first billion years of our Universe

  title={The Cosmic 21-cm Revolution: Charting the first billion years of our Universe},
  • Published 1 December 2019
  • Physics
The 21-cm signal from the Cosmic Dawn: metallicity dependence of high mass X-ray binaries
X-rays from High-Mass X-ray Binaries (HMXBs) are likely the main source of heating of the intergalactic medium (IGM) during Cosmic Dawn (CD), before the completion of reionization. This Epoch of
A CRASH simulation of the contribution of binary stars to the epoch of reionization
We use a set of 3D radiative transfer simulations to study the effect that a large fraction of binary stars in galaxies during the epoch of reionization has on the physical properties of the
The subtlety of Ly α photons: changing the expected range of the 21-cm signal
We present the evolution of the 21-cm signal from cosmic dawn and the epoch of reionization (EoR) in an upgraded model including three subtle effects of Ly α radiation: Ly α heating, CMB heating
Mapping Discrete Galaxies at Cosmic Dawn with 21 cm Observations
At cosmic dawn, the 21 cm signal from intergalactic hydrogen was driven by Ly-α photons from some of the earliest stars, producing a spatial pattern that reflected the distribution of galaxies at
Exploring the cosmic dawn and epoch of reionization with the 21 cm line
The dark age of the Universe, when no luminous object existed, ended with the birth of the first stars, galaxies, and black holes. This epoch is called cosmic dawn. Cosmic reionization is the major
Direct Optimal Mapping for 21cm Cosmology: A Demonstration with the Hydrogen Epoch of Reionization Array
Motivated by the desire for wide-field images with well-defined statistical properties for 21 cm cosmology, we implement an optimal mapping pipeline that computes a maximum likelihood estimator for the
Impact of the Primordial Stellar Initial Mass Function on the 21-cm Signal
Properties of the first generation of stars (Pop III), such as their initial mass function (IMF), are poorly constrained by observations and have yet to converge between simulations. The
Machine Learning to Decipher the Astrophysical Processes at Cosmic Dawn
The cosmic 21-cm line of hydrogen is expected to be measured in detail by the next generation of radio telescopes. The enormous dataset from future 21-cm surveys will revolutionize our understanding
Effect of the cosmological transition to metal-enriched star-formation on the hydrogen 21-cm signal
Mapping Cosmic Dawn with 21-cm tomography offers an exciting new window into the era of primordial star formation. However, self-consistent implementation of both the process of star formation and