Unveiling faint galaxies at the Epoch of Reionization and beyond: insights from JWST observations and SPHINX simulations

Open access Sep 2026

Using Gravitational Lensing to Probe for Candidate Quintessential Galaxies in the Epoch of Reionization

Understanding the properties of the first generation of galaxies is an ongoing challenge in observational astrophysics. James Webb Space Telescope deep-field observations have led to the identification of large numbers of galaxies within the Epoch of Reionization (EoR); however, it remains observationally challenging t...

Joshua Roberson, M. Bayliss, M. Gladders et al. · Astrophysical Journal · 0 citations

Preprint Sep 2026

RIGEL: Ultra-faint dwarf galaxy diversity shaped by inhomogeneous cosmic reionization

Ultra-faint dwarf galaxies (UFDs) are among the smallest and oldest galaxies in the Universe and are widely regarded as relics of cosmic reionization. To investigate how reionization quenches star formation and shapes the diversity of UFDs, we present a suite of eight cosmological zoom-in simulations of isolated UFDs w...

Yun-Wei Deng, Hui Li, E. Puchwein et al. · 0 citations

Preprint Oct 2026

How JWST is Revolutionizing Our View of Early Galaxy Formation

The James Webb Space Telescope (JWST) has been revolutionizing our understanding of early galaxy formation over its first four years of science operations. With un- precedented sensitivity, spatial resolution, and wavelength coverage from the near- to mid-infrared, JWST has enabled astronomers to identify hundreds of s...

R. Bouwens · 0 citations

Preprint Oct 2026

Consistently Reproducing Early Galaxy Observations and 21-cm Signal during the Epoch of Reionization

In the standard cosmological model, galaxies forming within dark matter haloes are the primary drivers of the Epoch of Reionization (EoR). The complex physics of galaxy formation introduces scatter in the relation between halo mass and star-formation activity, with implications for the production and escape of ionising...

Michele Bianco, S. Giri, Arghyadeep Basu et al. · 0 citations

Review Oct 2026

The Role of Environment in Shaping the Assembly Timelines of Massive Quiescent Galaxies at Cosmic Noon

JWST observations of massive quiescent galaxies (MQGs) at $z\sim2$ have revealed diverse star formation histories (SFHs). In this letter, we investigate whether these variations are linked to the environment in which MQGs reside, as quantified by the host dark matter halo mass. We identify 12 MQGs from a representative...

T. Gao, J. Mendel, Letizia Bugiani et al. · 0 citations

Preprint Sep 2026

MEGATRON: Dwarf Galaxy Quenching in the Epoch of Reionization

Low-mass galaxies during the Epoch of Reionization are expected to form stars in short bursts separated by periods of inactivity, but what regulates this cycle, and how sensitive it is to the modelling of stellar feedback, remains unclear. We use the MEGATRON high-redshift zoom simulation suite, in which four star-form...

David Attard, I. Iliev, Martin P. Rey et al. · 0 citations