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 …

The study of galaxy protoclusters is beginning to fill in unknown details of the important
phase of the assembly of clusters and cluster galaxies. This review describes the current …

Present-day clusters are massive halos containing mostly quiescent galaxies, while distant
protoclusters are extended structures containing numerous star-forming galaxies. We …

The presence of massive galaxies at high z as recently observed by JWST appears to
contradict the current ΛCDM cosmology. Here, we aim to alleviate this tension by …

Faint star-forming galaxies at z∼ 2–3 can be used as alternative background sources to
probe the Lyα forest in addition to quasars, yielding high sightline densities that enable 3D …

We unveil the complex shape of a proto-supercluster at z∼ 2.45 in the COSMOS field
exploiting the synergy of both spectroscopic and photometric redshifts. Thanks to the …

The observed scatter in intergalactic Lyα opacity at z≲ 6 requires large-scale fluctuations in
the neutral fraction of the intergalactic medium (IGM) after the expected end of reionization …

Mapping the Most Massive Overdensities through Hydrogen (MAMMOTH). II. Discovery of the
Extremely Massive Overdensity BOSS1441 at z = 2.32 - IOPscience This site uses cookies. By …

In this paper, we present a Lyα halo (LAH) identified by stacking∼ 3300 Lyα emitters (LAEs)
at z= 2.2–2.3. We carry out imaging observations and data reduction with Subaru/Hyper …

The MAMMOTH–Grism slitless spectroscopic survey is a Hubble Space Telescope (HST)
cycle 28 medium program, which is obtaining 45 orbits of WFC3/IR grism spectroscopy in …