Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang

A Adamo, LD Bradley, E Vanzella, A Claeyssens… - Nature, 2024 - nature.com
Abstract The Cosmic Gems arc is among the brightest and highly magnified galaxies
observed at redshift z≈ 10.2 (ref.). However, it is an intrinsically ultraviolet faint galaxy, in the …

An atlas of color-selected quiescent galaxies at z> 3 in public JWST fields

F Valentino, G Brammer, KML Gould… - The Astrophysical …, 2023 - iopscience.iop.org
We present the results of a systematic search for candidate quiescent galaxies in the distant
universe in 11 JWST fields with publicly available observations collected during the first 3 …

Spatially Resolved Properties of Galaxies at 5< z< 9 in the SMACS 0723 JWST ERO Field

C Giménez-Arteaga, PA Oesch… - The Astrophysical …, 2023 - iopscience.iop.org
We present the first spatially resolved measurements of galaxy properties in the JWST ERO
SMACS 0723 field. We perform a comprehensive analysis of five 5< z< 9 galaxies with …

A high black-hole-to-host mass ratio in a lensed AGN in the early Universe

LJ Furtak, I Labbé, A Zitrin, JE Greene, P Dayal… - Nature, 2024 - nature.com
Early JWST observations have uncovered a population of red sources that might represent a
previously overlooked phase of supermassive black hole growth,–. One of the most …

The GLASS-JWST Early Release Science Program. III. Strong-lensing model of Abell 2744 and its infalling regions

P Bergamini, A Acebron, C Grillo, P Rosati… - The Astrophysical …, 2023 - iopscience.iop.org
We present a new high-precision, JWST-based, strong-lensing model for the galaxy cluster
Abell 2744 at z= 0.3072. By combining the deep, high-resolution JWST imaging from the …

Nitrogen enrichment and clustered star formation at the dawn of the Galaxy

V Belokurov, A Kravtsov - Monthly Notices of the Royal …, 2023 - academic.oup.com
Anomalously high nitrogen-to-oxygen abundance ratios [N/O] are observed in globular
clusters (GCs), among the field stars of the Milky Way (MW), and even in the gas in az≈ 11 …

The production of ionizing photons in UV-faint z∼ 3–7 galaxies

G Prieto-Lyon, V Strait, CA Mason, G Brammer… - Astronomy & …, 2023 - aanda.org
Aims. The demographics of the production and escape of ionizing photons from UV-faint
early galaxies is a key unknown that has hindered attempts to discover the primary drivers of …

A needle in a haystack? Catching Population III stars in the epoch of reionization: I. Population III star-forming environments

A Venditti, L Graziani, R Schneider… - Monthly Notices of …, 2023 - academic.oup.com
Despite extensive search efforts, direct observations of the first [Population III (Pop III)] stars
have not yet succeeded. Theoretical studies have suggested that late Pop III star formation is …

Reaching for the stars – JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76

LJ Furtak, AK Meena, E Zackrisson… - Monthly Notices of …, 2024 - academic.oup.com
We present JWST/NIRSpec observations of a highly magnified star candidate at a
photometric redshift of z phot≃ 4.8, previously detected in JWST/NIRCam imaging of the …

Demographics of Hierarchical Black Hole Mergers in Dense Star Clusters

G Fragione, FA Rasio - The Astrophysical Journal, 2023 - iopscience.iop.org
With about one hundred mergers of binary black holes (BBHs) detected via gravitational
waves by the LIGO-Virgo-KAGRA (LVK) Collaboration, our understanding of the darkest …