We review progress over the past decade in observations of large-scale star formation, with
a focus on the interface between extragalactic and Galactic studies. Methods of measuring …

Hydrogen Lyman-α (Lyα) emission has been one of the major observational probes for the
high-redshift Universe since the first discoveries of high-z Lyα-emitting galaxies in the late …

We present a robust measurement and analysis of the rest-frame ultraviolet (UV) luminosity
functions at z= 4–8. We use deep Hubble Space Telescope imaging over the Cosmic …

Lyα emission from galaxies can be utilized to characterize the ionization state in the
intergalactic medium (IGM). We report our search for Lyα emission at z> 7 using a …

Abstract The Hobby–Eberly Telescope (HET) Dark Energy Experiment (HETDEX) is
undertaking a blind wide-field low-resolution spectroscopic survey of 540 deg 2 of sky to …

Detections and non-detections of Lyman alpha (Lyα) emission from z> 6 galaxies (< 1 Gyr
after the big bang) can be used to measure the timeline of cosmic reionization. Of key …

We report the detection of extended Lyα emission around individual star-forming galaxies at
redshifts z= 3− 6 in an ultradeep exposure of the Hubble Deep Field South obtained with …

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 …

Constraining the escape fraction of Lyman Continuum (LyC) photons from high-redshift
galaxies is crucial to understanding reionization. Recent observations have demonstrated …

Understanding the escape of Lyman continuum (LyC) and Lyman alpha (Lyα) photons from
molecular clouds is one of the keys to constraining the reionization history of the Universe …