Sam E. Cutler
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View article: The Structure and Formation Histories of Low-mass Quiescent Galaxies in the A2744 Cluster Environment
The Structure and Formation Histories of Low-mass Quiescent Galaxies in the A2744 Cluster Environment Open
Low-mass quiescent galaxies are thought to predominantly reside in overdense regions, as environmental effects are often invoked to explain their shutdown of star formation. These longer-timescale quenching mechanisms—such as interactions …
View article: The Evolution of Half-mass Radii and Color Gradients for Young and Old Quiescent Galaxies at 0.5 < <i>z</i> < 3 with JWST/PRIMER
The Evolution of Half-mass Radii and Color Gradients for Young and Old Quiescent Galaxies at 0.5 < <i>z</i> < 3 with JWST/PRIMER Open
We present a study of the size growth of the red sequence between 0.5 < z < 3, tracing the evolution of quiescent galaxies in both effective half-light and half-mass radii using multiwavelength JWST/NIRCam imaging provided by the PRIMER su…
View article: A Confirmed Deficit of Hot and Cold Dust Emission in the Most Luminous Little Red Dots
A Confirmed Deficit of Hot and Cold Dust Emission in the Most Luminous Little Red Dots Open
Luminous broad H α emission and red rest-optical spectral energy distributions (SEDs) are the hallmark of compact little red dots (LRDs), implying highly attenuated dusty starbursts and/or obscured active galactic nuclei (AGN). However, th…
View article: What you see is what you get: empirically measured bolometric luminosities of Little Red Dots
What you see is what you get: empirically measured bolometric luminosities of Little Red Dots Open
New populations of red active galactic nuclei (known as ``Little Red Dots'') discovered by JWST exhibit remarkable spectral energy distributions. Leveraging X-ray through far-infrared observations of two of the most luminous known Little R…
View article: UNCOVER/MegaScience: No Evidence of Environmental Quenching in a <i>z </i>∼ 2.6 Protocluster
UNCOVER/MegaScience: No Evidence of Environmental Quenching in a <i>z </i>∼ 2.6 Protocluster Open
Environmental quenching—where interactions with other galaxies and/or the intracluster medium suppress star formation in low-mass galaxies—has been well established as the primary driver behind the formation of the red sequence for low-mas…
View article: JWST+ALMA reveal the build up of stellar mass in the cores of dusty star-forming galaxies at Cosmic Noon
JWST+ALMA reveal the build up of stellar mass in the cores of dusty star-forming galaxies at Cosmic Noon Open
Dusty star-forming galaxies have long been suspected to serve as the missing evolutionary bridge between the star-forming and quiescent phases of massive galaxy evolution. With the combined power of JWST and ALMA, it is now possible to use…
View article: JWST UNCOVERs the Optical Size–Stellar Mass Relation at 4 < <i>z</i> < 8: Rapid Growth in the Sizes of Low-mass Galaxies in the First Billion Years of the Universe
JWST UNCOVERs the Optical Size–Stellar Mass Relation at 4 < <i>z</i> < 8: Rapid Growth in the Sizes of Low-mass Galaxies in the First Billion Years of the Universe Open
We study the rest-frame optical and ultraviolet (UV) morphology of galaxies in the first billion years of the Universe. Using James Webb Space Telescope data from the UNCOVER and MegaScience surveys targeting the lensing cluster A2744, we …
View article: Measuring Emission Lines with JWST MegaScience Medium Bands: A New Window into Dust and Star Formation at Cosmic Noon
Measuring Emission Lines with JWST MegaScience Medium Bands: A New Window into Dust and Star Formation at Cosmic Noon Open
We demonstrate the power of JWST-NIRCam medium-band photometry to measure emission line fluxes and study the dust and star formation properties of galaxies at cosmic noon. In this work, we present photometric emission line measurements and…
View article: DUALZ—Deep UNCOVER-ALMA Legacy High-<i>Z</i> Survey
DUALZ—Deep UNCOVER-ALMA Legacy High-<i>Z</i> Survey Open
We present the survey design and initial results of the Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 9 program of DUALZ, which aims to establish a joint ALMA and JWST public legacy field targeting the massive galaxy cluster A2…
View article: UNCOVER: Significant Reddening in Cosmic Noon Quiescent Galaxies
UNCOVER: Significant Reddening in Cosmic Noon Quiescent Galaxies Open
We explore the physical properties of five massive quiescent galaxies at z ∼ 2.5, revealing the presence of nonnegligible dust reservoirs. JWST NIRSpec observations were obtained for each target, finding no significant line emission; multi…
View article: Measuring Emission Lines with JWST-MegaScience Medium-Bands: A New Window into Dust and Star Formation at Cosmic Noon
Measuring Emission Lines with JWST-MegaScience Medium-Bands: A New Window into Dust and Star Formation at Cosmic Noon Open
We demonstrate the power of JWST-NIRCam medium-band photometry to measure emission line fluxes and study dust and star formation properties of galaxies at cosmic noon. In this work, we present photometric emission line measurements and spa…
View article: Investigating photometric and spectroscopic variability in the multiply imaged little red dot A2744-QSO1
Investigating photometric and spectroscopic variability in the multiply imaged little red dot A2744-QSO1 Open
JWST observations have uncovered a new population of red, compact objects at high redshifts dubbed “little red dots” (LRDs), which typically show broad emission lines and are thought to be dusty active galactic nuclei (AGNs). Some of their…
View article: UNCOVERing the High-redshift AGN Population among Extreme UV Line Emitters
UNCOVERing the High-redshift AGN Population among Extreme UV Line Emitters Open
JWST has revealed diverse new populations of high-redshift ( z ∼ 4–11) active galactic nuclei (AGNs) and extreme star-forming galaxies that challenge current photoionization models. In this paper, we use rest-frame UV emission-line diagnos…
View article: The Structure and Formation Histories of Low-Mass Quiescent Galaxies in the Abell 2744 Cluster Environment
The Structure and Formation Histories of Low-Mass Quiescent Galaxies in the Abell 2744 Cluster Environment Open
Low-mass quiescent galaxies are thought to predominantly reside in overdense regions, as environmental effects are often invoked to explain their shutdown of star formation. These longer-timescale quenching mechanisms - such as interaction…
View article: UNCOVER/MegaScience: No Evidence of Environmental Quenching in a z$\sim$2.6 Proto-cluster
UNCOVER/MegaScience: No Evidence of Environmental Quenching in a z$\sim$2.6 Proto-cluster Open
Environmental quenching -- where interactions with other galaxies and/or the intra-cluster medium (ICM) suppress star formation in low-mass galaxies -- has been well-established as the primary driver behind the formation of the red sequenc…
View article: The UNCOVER Survey: First Release of Ultradeep JWST/NIRSpec PRISM Spectra for ∼700 Galaxies from <i>z</i> ∼ 0.3–13 in A2744
The UNCOVER Survey: First Release of Ultradeep JWST/NIRSpec PRISM Spectra for ∼700 Galaxies from <i>z</i> ∼ 0.3–13 in A2744 Open
We present the design and observations of low-resolution JWST/NIRSpec PRISM spectroscopy from the Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) Cycle 1 JWST Treasury program. Targets are selected usin…
View article: UNCOVER: 404 Error—Models Not Found for the Triply Imaged Little Red Dot A2744-QSO1*
UNCOVER: 404 Error—Models Not Found for the Triply Imaged Little Red Dot A2744-QSO1* Open
JWST has revealed an abundance of compact, red objects at z ≈ 5–8 dubbed “little red dots” (LRDs), whose SEDs display a faint blue UV continuum followed by a steep rise in the optical. Despite extensive study of their characteristic V-shap…
View article: A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots
A confirmed deficit of hot and cold dust emission in the most luminous Little Red Dots Open
Luminous broad H$\alpha$ emission and red rest-optical SEDs are the hallmark of compact Little Red Dots (LRDs), implying highly attenuated dusty starbursts and/or obscured active galactic nuclei. However, the lack of observed FIR emission …
View article: Investigating photometric and spectroscopic variability in the multiply-imaged Little Red Dot A2744-QSO1
Investigating photometric and spectroscopic variability in the multiply-imaged Little Red Dot A2744-QSO1 Open
JWST observations have uncovered a new population of red, compact objects at high redshifts dubbed `Little Red Dots' (LRDs), which typically show broad emission lines and are thought to be dusty Active Galactic Nuclei (AGN). Some of their …
View article: UNCOVER: The Rest-ultraviolet to Near-infrared Multiwavelength Structures and Dust Distributions of Submillimeter-detected Galaxies in A2744
UNCOVER: The Rest-ultraviolet to Near-infrared Multiwavelength Structures and Dust Distributions of Submillimeter-detected Galaxies in A2744 Open
With the wavelength coverage, sensitivity, and high spatial resolution of JWST, it is now possible to peer through the dust attenuation to probe the rest-frame near-infrared (NIR) and stellar structures of extremely dusty galaxies at cosmi…
View article: Discovery of Ancient Globular Cluster Candidates in The Relic, a Quiescent Galaxy at z=2.5
Discovery of Ancient Globular Cluster Candidates in The Relic, a Quiescent Galaxy at z=2.5 Open
Globular clusters (GCs) are some of the oldest bound structures in the Universe, holding clues to the earliest epochs of star formation and galaxy assembly. However, accurate age measurements of ancient clusters are challenging due to the …
View article: The Evolution of Half-Mass Radii and Color Gradients for Young and Old Quiescent Galaxies at $0.5 < z < 3$ with JWST/PRIMER
The Evolution of Half-Mass Radii and Color Gradients for Young and Old Quiescent Galaxies at $0.5 < z < 3$ with JWST/PRIMER Open
We present a study of the size growth of the red sequence between $0.510$, whereas half-mass radii are derived from the F444W profiles together with the F277W-F444W color-$M_*$/L relation. We investigate the dependence of the ratio $r_{e, …
View article: UNCOVER: Candidate Red Active Galactic Nuclei at 3 < z < 7 with JWST and ALMA
UNCOVER: Candidate Red Active Galactic Nuclei at 3 < z < 7 with JWST and ALMA Open
The James Webb Space Telescope (JWST) is revolutionizing our knowledge of z > 5 galaxies and their actively accreting black holes. Using the JWST Cycle 1 Treasury program Ultradeep NIRSpec and NIRCam Observations before the Epoch of Reioni…
View article: JWST UNCOVERs the Optical Size - Stellar Mass Relation at $4
JWST UNCOVERs the Optical Size - Stellar Mass Relation at $4 Open
We study the rest-frame optical and ultraviolet morphology of galaxies in the first billion years of the Universe. Using JWST data from the UNCOVER and MegaScience surveys targeting the lensing cluster Abell 2744 we present multi-band morp…
View article: An unambiguous AGN and a Balmer break in an Ultraluminous Little Red Dot at z=4.47 from Ultradeep UNCOVER and All the Little Things Spectroscopy
An unambiguous AGN and a Balmer break in an Ultraluminous Little Red Dot at z=4.47 from Ultradeep UNCOVER and All the Little Things Spectroscopy Open
We present a detailed exploration of the most optically-luminous Little Red Dot ($L_{Hα}=10^{44}$erg/s, $L_V=10^{45}$erg/s, F444W=22AB) found to date. Located in the Abell 2744 field, source A744-45924 was observed by NIRSpec/PRISM with ul…
View article: UNCOVER: A NIRSpec Census of Lensed Galaxies at z = 8.50–13.08 Probing a High-AGN Fraction and Ionized Bubbles in the Shadow
UNCOVER: A NIRSpec Census of Lensed Galaxies at z = 8.50–13.08 Probing a High-AGN Fraction and Ionized Bubbles in the Shadow Open
We present JWST NIRSpec prism spectroscopy of lensed galaxies at z ≳ 9 found behind the massive galaxy cluster Abell 2744 in the UNCOVER Cycle 1 Treasury Program. We confirm the redshift via emission lines and/or the Ly α break for 10 gala…
View article: Efficient formation of a massive quiescent galaxy at redshift 4.9
Efficient formation of a massive quiescent galaxy at redshift 4.9 Open
Within the established framework of structure formation, galaxies start as systems of low stellar mass and gradually grow into far more massive galaxies. The existence of massive galaxies in the first billion years of the Universe, as sugg…
View article: Medium Bands, Mega Science: A JWST/NIRCam Medium-band Imaging Survey of A2744
Medium Bands, Mega Science: A JWST/NIRCam Medium-band Imaging Survey of A2744 Open
In this paper, we describe the “Medium Bands, Mega Science” JWST Cycle 2 survey (JWST-GO-4111) and demonstrate the power of these data to reveal both the spatially integrated and spatially resolved properties of galaxies from the local Uni…
View article: The Extreme Low-mass End of the Mass–Metallicity Relation at z ∼ 7
The Extreme Low-mass End of the Mass–Metallicity Relation at z ∼ 7 Open
The mass–metallicity relation provides crucial insights into the baryon cycle in galaxies and strong constraints on galaxy formation models. We use JWST NIRSpec observations from the UNCOVER program to measure the gas-phase metallicity in …
View article: UNCOVER: 404 Error -- Models Not Found for the Triply Imaged Little Red Dot A2744-QSO1
UNCOVER: 404 Error -- Models Not Found for the Triply Imaged Little Red Dot A2744-QSO1 Open
JWST has revealed an abundance of compact, red objects at $z\approx5-8$ dubbed "little red dots" (LRDs), whose SEDs display a faint blue UV continuum followed by a steep rise in the optical. Despite extensive study of their characteristic …