UNCOVER spectroscopy confirms the surprising ubiquity of active galactic nuclei in red sources at z> 5

JE Greene, I Labbe, AD Goulding… - The Astrophysical …, 2024 - iopscience.iop.org
Abstract The James Webb Space Telescope is revealing a new population of dust-reddened
broad-line active galactic nuclei (AGN) at redshifts z≳ 5. Here we present deep …

A comprehensive study of galaxies at z∼ 9–16 found in the early JWST data: ultraviolet luminosity functions and cosmic star formation history at the pre-reionization …

Y Harikane, M Ouchi, M Oguri, Y Ono… - The Astrophysical …, 2023 - iopscience.iop.org
We conduct a comprehensive study on dropout galaxy candidates at z∼ 9–16 using the first
90 arcmin 2 James Webb Space Telescope (JWST) Near Infrared Camera images taken by …

Most of the photons that reionized the Universe came from dwarf galaxies

H Atek, I Labbé, LJ Furtak, I Chemerynska, S Fujimoto… - Nature, 2024 - nature.com
The identification of sources driving cosmic reionization, a major phase transition from
neutral hydrogen to ionized plasma around 600–800 Myr after the Big Bang,–, has been a …

Discovery and properties of ultra-high redshift galaxies (9 < z < 12) in the JWST ERO SMACS 0723 Field

NJ Adams, CJ Conselice, L Ferreira… - Monthly Notices of …, 2023 - academic.oup.com
We present a reduction and analysis of the James Webb Space Telescope (JWST) SMACS
0723 field using new post-launch calibrations to conduct a search for ultra-high-redshift …

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 galaxy UV luminosity function at z ≃ 11 from a suite of public JWST ERS, ERO, and Cycle-1 programs

DJ McLeod, CT Donnan, RJ McLure… - Monthly Notices of …, 2024 - academic.oup.com
We present a new determination of the evolving galaxy ultraviolet (UV) luminosity function
(LF) over the redshift range 9.5< z< 12.5 based on a wide-area (> 250 arcmin2) data set of …

The physical conditions of emission-line galaxies at cosmic dawn from JWST/NIRSpec spectroscopy in the SMACS 0723 early release observations

JR Trump, PA Haro, RC Simons… - The Astrophysical …, 2023 - iopscience.iop.org
We present rest-frame optical emission-line flux ratio measurements for five z> 5 galaxies
observed by the James Webb Space Telescope Near-Infared Spectrograph (NIRSpec) in …

The ultraviolet continuum slopes of high-redshift galaxies: evidence for the emergence of dust-free stellar populations at z > 10

F Cullen, DJ McLeod, RJ McLure… - Monthly Notices of …, 2024 - academic.oup.com
We present an analysis of the ultraviolet (UV) continuum slopes (β) for a sample of 172
galaxy candidates at 8< z phot< 16 selected from a combination of JWST NIRCam imaging …

UNCOVERing the extended strong lensing structures of Abell 2744 with the deepest JWST imaging

LJ Furtak, A Zitrin, JR Weaver, H Atek… - Monthly Notices of …, 2023 - academic.oup.com
We present a new parametric lens model for the massive galaxy cluster Abell 2744 based
on new ultra-deep JWST imaging taken in the framework of the UNCOVER program. These …

A first look at the SMACS0723 JWST ERO: spectroscopic redshifts, stellar masses, and star-formation histories

AC Carnall, R Begley, DJ McLeod… - Monthly Notices of …, 2023 - academic.oup.com
We present a first-look analysis of the JWST ERO data in the SMACS J0723. 3-7327 cluster
field. We begin by reporting 10 new spectroscopic redshifts from λobs= 1.8–5.2 μm NIRSpec …