Galaxy formation is at the heart of our understanding of cosmic evolution. Although there is a
consensus that galaxies emerged from the expanding matter background by gravitational …

The transformation of cold neutral intergalactic hydrogen into a highly ionized warm plasma
marks the end of the cosmic dark ages and the beginning of the age of galaxies. The details …

We present observations with the Cosmic Origins Spectrograph (COS) onboard the Hubble
Space Telescope of five star-forming galaxies at redshifts in the range 0.2993–0.4317 and …

Thomson optical depth τ measurements from Planck provide new insights into the
reionization of the universe. In pursuit of model-independent constraints on the properties of …

The properties of the first galaxies, expected to drive the Cosmic Dawn and the Epoch of
Reionization, are encoded in the 3D structure of the cosmic 21-cm signal. Parameter …

Understanding cosmic reionization requires the identification and characterization of early
sources of hydrogen-ionizing photons. The 2012 Hubble Ultra Deep Field (UDF12) …

We report the detection of the Lyman continuum (LyC) radiation of the compact star-forming
galaxy (SFG) J1154+ 2443 observed with the Cosmic Origins Spectrograph (COS) onboard …

Starlight from galaxies plays a pivotal role throughout the process of cosmic reionization. We
present the statistics of dwarf galaxy properties at z> 7 in haloes with masses up to 109 M⊙ …

One of the key questions in observational cosmology is the identification of the sources
responsible for ionization of the Universe after the cosmic 'Dark Ages', when the baryonic …

The Epoch of Reionization (EoR) represents a milestone in the evolution of our Universe.
Star-forming galaxies that existed during the EoR likely emitted a significant fraction (~ 5 …