The radiation from stars and active galactic nuclei (AGNs) creates photodissociation regions
(PDRs) and X-ray-dominated regions (XDRs), where the chemistry or heating is dominated …

The universe's biggest galaxies have both vast atmospheres and supermassive central
black holes. This article reviews how those two components of a large galaxy couple and …

Abstract Surveys with the James Webb Space Telescope (JWST) have discovered
candidate galaxies in the first 400 Myr of cosmic time. Preliminary indications have …

One of the main goals of the JWST is to study the first galaxies in the Universe. We present a
systematic photometric analysis of very distant galaxies in the first JWST deep field towards …

ABSTRACT Spitzer/Infrared Array Camera (IRAC) imaging has revealed that the brightest
z∼ 7− 8 galaxies often exhibit young ages and strong nebular line emission, hinting at high …

We describe new JWST/NIRSpec observations of galaxies at z≳ 7 taken from the CEERS
survey. Previous observations of this area have revealed associations of Lyα emitters at …

We present the first constraints on the prevalence of z> 10 galaxies in the Hubble Ultra Deep
Field (HUDF) leveraging new NIRCam observations from JEMS (JWST Extragalactic …

ABSTRACT I introduce some improvements to the ppxf method, which measures the stellar
and gas kinematics, star formation history (SFH) and chemical composition of galaxies. I …

The origins of Lyman continuum (LyC) photons responsible for the reionization of the
universe are as of yet unknown and highly contested. Detecting LyC photons from the Epoch …

Inference of the physical properties of stellar populations from observed photometry and
spectroscopy is a key goal in the study of galaxy evolution. In recent years, the quality and …