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The Heavy Metal Survey: The Evolution of Stellar Metallicities, Abundance Ratios, and Ages of Massive Quiescent Galaxies Since z~2
Aliza G. Beverage, Mariska Kriek, Katherine A. Suess +11
We present the elemental abundances and ages of 19 massive quiescent galaxies at and from the Keck Heavy Metal Survey. The ultra-deep LRIS and MOSFIRE spectra…
JWST UNCOVER: The Overabundance of Ultraviolet-luminous Galaxies at
Iryna Chemerynska, Hakim Atek, Lukas J. Furtak +20
Over the past year, JWST has uncovered galaxies at record-breaking distances up to . The JWST UNCOVER (ultra-deep NIRSpec and NIRcam observations before the epoch of rei…
A robust and simple method for filling in masked data in astronomical images
Pieter van Dokkum, Imad Pasha
Astronomical images often have regions with missing or unwanted information, such as bad pixels, bad columns, cosmic rays, masked objects, or residuals from imperfect model subtrac…
The Heavy Metal Survey: Star Formation Constraints and Dynamical Masses of 21 Massive Quiescent Galaxies at
Mariska Kriek, Aliza G. Beverage, Sedona H. Price +14
In this paper, we present the Heavy Metal Survey, which obtained ultradeep medium-resolution spectra of 21 massive quiescent galaxies at with Keck/LRIS and MOSFIRE. Wit…
Detection of Accretion Shelves Out to the Virial Radius of a Low-Mass Galaxy with JWST
Charlie Conroy, Benjamin D. Johnson, Pieter van Dokkum +8
We report the serendipitous discovery of an extended stellar halo surrounding the low-mass galaxy Ark 227 (; d=35 Mpc) in deep JWST NIRCam imaging from…
FRESCO: An extended, massive, rapidly rotating galaxy at z=5.3
Erica J. Nelson, Gabriel Brammer, Clara Gimenez-Arteaga +43
With the remarkable sensitivity and resolution of JWST in the infrared, measuring rest-optical kinematics of galaxies at has become possible for the first time. This study pi…
The UNCOVER Survey: A First-look HST+JWST Catalog of Galaxy Redshifts and Stellar Population Properties Spanning
Bingjie Wang, Joel Leja, Ivo Labbé +41
The recent UNCOVER survey with the James Webb Space Telescope (JWST) exploits the nearby cluster Abell 2744 to create the deepest view of our universe to date by leveraging strong…
Initial mass function variability from the integrated light of diverse stellar systems
Chloe M. Cheng, Alexa Villaume, Michael L. Balogh +4
We present a uniform analysis of the stellar initial mass function (IMF) from integrated light spectroscopy of 15 compact stellar systems (11 globular clusters in M31 and 4 ultra c…
UNCOVER: The growth of the first massive black holes from JWST/NIRSpec -- spectroscopic redshift confirmation of an X-ray luminous AGN at z=10.1
Andy D. Goulding, Jenny E. Greene, David J. Setton +27
The James Webb Space Telescope is now detecting early black holes (BHs) as they transition from "seeds" to supermassive BHs. Recently Bogdan et al. (2023) reported the detection of…
Confirmation of an anomalously low dark matter content for the galaxy NGC1052-DF4 from deep, high resolution continuum spectroscopy
Zili Shen, Pieter van Dokkum, Shany Danieli
NGC1052-DF4 was found to be the second "galaxy lacking dark matter" in the NGC1052 group, based on its velocity dispersion of km/s as measured from t…
A massive compact quiescent galaxy at z=2 with a complete Einstein ring in JWST imaging
Pieter van Dokkum, Gabriel Brammer, Bingjie Wang +2
One of the surprising results from HST was the discovery that many of the most massive galaxies at z~2 are very compact, having half-light radii of only 1-2 kpc. The interpretation…
UNCOVER spectroscopy confirms a surprising ubiquity of AGN in red galaxies at
Jenny E. Greene, Ivo Labbe, Andy D. Goulding +31
JWST is revealing a new population of dust-reddened broad-line active galactic nuclei (AGN) at redshifts . Here we present deep NIRSpec/Prism spectroscopy from the Cycle…
Mapping dusty galaxy growth at with FRESCO: Detection of H in submm galaxy HDF850.1 and the surrounding overdense structures
Thomas Herard-Demanche, Rychard J. Bouwens, Pascal A. Oesch +21
We report the detection of a 13 H emission line from HDF850.1 at using the FRESCO NIRCam F444W grism observations. Detection of H in HDF850.1 is notewort…
DUALZ: Deep UNCOVER-ALMA Legacy High-Z Survey
Seiji Fujimoto, Rachel Bezanson, Ivo Labbe +29
We present the survey design and initial results of the ALMA Cycle 9 program of DUALZ, which aims to establish a joint ALMA and JWST public legacy field targeting the massive galax…
Accelerated Formation of Ultra-Massive Galaxies in the First Billion Years
Mengyuan Xiao, Pascal Oesch, David Elbaz +35
Recent JWST observations have revealed an unexpected abundance of massive galaxy candidates in the early Universe, extending further in redshift and to lower luminosity than what h…
UNCOVER: JWST Spectroscopy of Three Cold Brown Dwarfs at Kiloparsec-scale Distances
Adam J. Burgasser, Rachel Bezanson, Ivo Labbe +19
We report JWST/NIRSpec spectra of three distant T-type brown dwarfs identified in the Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) survey of…
UNCOVER: A NIRSpec Census of Lensed Galaxies at z=8.50-13.08 Probing a High AGN Fraction and Ionized Bubbles in the Shadow
Seiji Fujimoto, Bingjie Wang, John Weaver +33
We present JWST NIRSpec prism spectroscopy of gravitationally lensed galaxies at found behind the massive galaxy cluster Abell 2744 in the UNCOVER Cycle 1 Treasury Prog…
Most of the photons that reionized the Universe came from dwarf galaxies
Hakim Atek, Ivo Labbé, Lukas J. Furtak +30
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 (Dayal et al. 2018…
A high black hole to host mass ratio in a lensed AGN in the early Universe
Lukas J. Furtak, Ivo Labbé, Adi Zitrin +34
Early JWST observations have uncovered a new population of red sources that might represent a previously overlooked phase of supermassive black hole growth (Kocevski et al. 2023; M…
UNCOVER: Illuminating the Early Universe -- JWST/NIRSpec Confirmation of Galaxies
Bingjie Wang, Seiji Fujimoto, Ivo Labbe +24
Observations of high-redshift galaxies provide a critical direct test to the theories of early galaxy formation, yet to date, only three have been spectroscopically confirmed at $z…
Dust attenuation, dust content and geometry of star-forming galaxies
Junkai Zhang, Stijn Wuyts, Sam E. Cutler +11
We analyse the joint distribution of dust attenuation and projected axis ratios, together with galaxy size and surface brightness profile information, to infer lessons on the dust…
Little Red Dots: an abundant population of faint AGN at z~5 revealed by the EIGER and FRESCO JWST surveys
Jorryt Matthee, Rohan P. Naidu, Gabriel Brammer +25
Characterising the prevalence and properties of faint active galactic nuclei (AGN) in the early Universe is key for understanding the formation of supermassive black holes (SMBHs)…
JWST UNCOVER: Discovery of Galaxy Candidates Behind the Lensing Cluster Abell 2744
Hakim Atek, Iryna Chemerynska, Bingjie Wang +19
We present the results of a search for high-redshift () galaxy candidates in the JWST UNCOVER survey, using deep NIRCam and NIRISS imaging in 7 bands over arcmin…
Sizes and mass profiles of candidate massive galaxies discovered by JWST at 7<z<9: evidence for very early formation of the central ~100 pc of present-day ellipticals
Josephine F. W. Baggen, Pieter van Dokkum, Ivo Labbe +8
The first JWST data revealed an unexpected population of red galaxies that appear to have redshifts of and high masses of 10 M (Labbé et a…