Timothy Carleton

Are JWST/NIRCam color gradients in the lensed z=2.3 dusty star-forming galaxy El Anzuelo due to central dust attenuation or inside-out galaxy growth?

Patrick S. Kamieneski, Brenda L. Frye, Massimo Pascale +24

Gradients in the mass-to-light ratio of distant galaxies impede our ability to characterize their size and compactness. The long-wavelength filters of $J W S T$ 's NIRCam offer a signi…

Globular Clusters in the Galaxy Cluster MACS0416 at z = 0.397

Jessica M. Berkheimer, Rogier A. Windhorst, William E. Harris +27

We present a photometric analysis of globular clusters (GCs) in the massive galaxy cluster MACS J0416.1-2403 (z = 0.397) using deep JWST/NIRCam imaging from the PEARLS program. PSF…

astro-ph.GA2016

PHIBSS: Exploring the Dependence of the CO-H $_{2}$ Conversion Factor on Total Mass Surface Density at $z < 1.5$

Timothy Carleton, Michael C. Cooper, Alberto D. Bolatto +10

We present an analysis of the relationship between the CO-H $_{2}$ conversion factor ( $I^\pm_{CO}$ ) and total mass surface density ( $I^£_{tot}$ ) in star-forming galaxies at $z <…

PEARLS: NuSTAR and XMM-Newton Extragalactic Survey of the JWST North Ecliptic Pole Time Domain Field VI: Multiwavelength SED Analysis

Rafael Ortiz, Francesca Civano, Rogier A. Windhorst +27

We model spectral energy distributions of 261 X-ray sources to $z \sim 5$ in the North Ecliptic Pole Time Domain Field, extending prior XMM-Newton and NuSTAR analyses. Using the st…

PEARLS: Globular Clusters and Ultra-Compact Dwarfs in the El Gordo Galaxies at z=0.87

William E. Harris, Marta Reina-Campos, Anton M. Koekemoer +11

JWST/NIRCam 0.9 to 2.0 micron images reveal a population of point sources around the major galaxies in the El Gordo cluster at redshift z=0.87. Their distribution in the color--mag…

JWST's PEARLS: Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results

Rogier A. Windhorst, Seth H. Cohen, Rolf A. Jansen +82

We give an overview and describe the rationale, methods, and first results from NIRCam images of the JWST "Prime Extragalactic Areas for Reionization and Lensing Science" ("PEARLS"…

UVCANDELS: Catalogs of photometric redshifts and galaxy physical properties

Vihang Mehta, Marc Rafelski, Ben Sunnquist +76

The UltraViolet imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) program provides deep HST F275W and F435W imaging over four CANDELS…

astro-ph.CO2024

SKYSURF VI: The Impact of Thermal Variations of HST on Background Light Estimates

Isabel A. McIntyre, Timothy Carleton, Rosalia O'Brien +6

The SKYSURF project constrained extragalactic background light (EBL) and diffuse light with the vast archive of Hubble Space Telescope (HST) images. Thermal emission from HST itsel…

Dwarf galaxies show little ISM evolution from $z \sim 1$ to $z \sim 0$ : a spectroscopic study of metallicity, star formation, and electron density

John Pharo, Yicheng Guo, Guillermo Barro Calvo +6

We present gas-phase metallicity measurements for 583 emission line galaxies at $0.3 < z < 0.85$ , including 388 dwarf galaxies with $l o g (M_{⋆} / M_{⊙}) < 9.5$ , and explore the de…

A long time ago in an LAE far, far away: a signpost of early reionization or a nascent AGN at $z = 13$ ?

Joshua Cohon, Christopher Cain, Rogier Windhorst +3

The JADES survey recently reported the discovery of JADES-GS-z13-1-LA at $z = 13$ , the highest redshift Ly $I^\pm$ emitter (LAE) ever observed. This observation suggests that either th…

Spectral Energy Distributions of Globular Clusters in VV191a

Ashton Cardona, Timothy Carleton, Jessica Berkheimer +9

We investigate globular cluster (GC) candidates associated with the elliptical galaxy VV191a using JWST NIRCam and archival HST imaging. Beginning with an initial catalog of over 5…

Searching for Intragroup Light in Deep U-band Imaging of the COSMOS Field

Tyler McCabe, Caleb Redshaw, Lillian Otteson +24

We present the results of deep, ground based U-band imaging with the Large Binocular Telescope of the Cosmic Evolution Survey (COSMOS) field as part of the near-UV imaging program,…

TREASUREHUNT: Transients and Variability Discovered with HST in the JWST North Ecliptic Pole Time Domain Field

Rosalia O'Brien, Rolf A. Jansen, Norman A. Grogin +56

The JWST North Ecliptic Pole (NEP) Time Domain Field (TDF) is a $>$ 14 arcmin diameter field optimized for multi-wavelength time-domain science with JWST. It has been observed acros…

astro-ph.IM2019

The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 edition

The MSE Science Team, Carine Babusiaux, Maria Bergemann +258

(Abridged) The Maunakea Spectroscopic Explorer (MSE) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. It will unvei…

astro-ph.GA2021

An Excess of Globular Clusters in UDGs Formed Through Tidal Heating

Timothy Carleton, Yicheng Guo, Ferah Munshi +2

To investigate the origin of elevated globular cluster abundances observed around Ultra-Diffuse Galaxies (UDGs), we simulate globular cluster populations hosted by UDGs formed thro…

astro-ph.CO2026

SKYSURF IX -- The Cosmic Optical and Infrared Background from Integrated Galaxy Light Measurements

Scott A. Tompkins, Simon P. Driver, Aaron S. G. Robotham +15

As part of the SKYSURF Hubble Space Telescope (HST) Legacy Archival program we present galaxy number counts which yield measurements of the extragalactic background light (EBL) at…

astro-ph.IM2026

SKYSURF. X. A Novel Method for Measuring Integrated Galaxy Light

Delondrae D. Carter, Timothy Carleton, Daniel J. Henningsen +19

We describe the drizzling pipeline and contents of the drizzled database for Hubble Space Telescope Cycle 27-29 Archival Legacy project "SKYSURF," the largest archival project ever…

Connection Between Dwarf Galaxies and Globular Clusters: Insights from the Perseus Cluster Using Subaru Imaging and Keck Spectroscopy

Yimeng Tang, Aaron J. Romanowsky, Song Huang +11

We present a systematic study of 189 dwarf galaxies and their globular cluster (GC) systems in the Perseus cluster, based on deep Subaru Hyper Suprime-Cam imaging and Keck spectros…

Explaining JWST counts with galaxy formation models

Giorgio Manzoni, Tom Broadhurst, Jeremy Lim +18

A distinct power-law break is apparent m_AB approximately 21 in the deep Near-Infrared PEARLS-JWST galaxy counts. The break becomes more pronounced at longer wavelengths, with the…

PEARLS: Discovery of Point-Source Features Within Galaxies in the North Ecliptic Pole Time Domain Field

Rafael Ortiz, Rogier A. Windhorst, Seth H. Cohen +36

The first public 0.9-4.4Î¼m NIRCam images of the North Ecliptic Pole (NEP) Time Domain Field (TDF) uncovered galaxies displaying point-source features in their cores as seen in the…

astro-ph.GA2019

Evidence for Non-smooth Quenching in Massive Galaxies at $z \sim 1$

Timothy Carleton, Yicheng Guo, Hooshang Nayyeri +3

We investigate a large sample of massive galaxies at $z \sim 1$ with combined $H S T$ broad-band and grism observations to constrain the star-formation histories of these systems as th…

astro-ph.GA2021

Galaxy Science with ORCAS: Faint Star-Forming Clumps to AB $\leq$ 31 mag and r $_{e}$ $\geq$ 0.01"

Rogier A. Windhorst, Timothy Carleton, Seth H Cohen +6

The NASA concept mission ORCAS (Orbiting Configurable Artificial Star) aims to provide near diffraction-limited angular resolution at visible and near-infrared wavelengths using la…

astro-ph.GA2022

Deep Large Binocular Camera r-band Observations of the GOODS-N Field

Teresa A. Ashcraft, Tyler McCabe, Caleb Redshaw +22

We obtained 838 Sloan r-band images (~28 hrs) of the GOODS-North field with the Large Binocular Camera (LBC) on the Large Binocular Telescope in order to study the presence of exte…

Hidden in Plain Sight: Searching for Globular Clusters Within JWST Observations of the PLCK G165.7+67.0 Galaxy Cluster

Tyler R. Hinrichs, Patrick S. Kamieneski, Rogier A. Windhorst +21

Although the James Webb Space Telescope (JWST) has received much attention for its ability to search deeper into the cosmos than ever before, it also enhances our capability to stu…

Magellanic System Stars Identified in SMACS J0723.3-7327 James Webb Space Telescope Early Release Observations Images

Jake Summers, Rogier A. Windhorst, Seth H. Cohen +23

We identify 71 distant stars in JWST/NIRCam ERO images of the field of galaxy cluster SMACS J0723.3-7327 (SMACS 0723). Given the relatively small ( $\sim$ $1 0^{\circ}$ ) angular separ…

astro-ph.CO2026

SKYSURF-11: A New Zodiacal Light Model Optimized for Optical Wavelengths

Rosalia O'Brien, Richard G. Arendt, Rogier A. Windhorst +15

We present an improved zodiacal light model, optimized for optical wavelengths, using archival Hubble Space Telescope (HST) imaging from the SKYSURF program. The Kelsall et al. 199…

Comparative Bayesian SED Fitting of PEARLSDG

BarÄ±Å Bayraktar, Timothy Carleton, Rogier A. Windhorst +2

The initial distance to PEARLSDG estimated from the Tip of the Red Giant Branch suggested it was an exotic isolated quiescent dwarf galaxy. We combine recent and archival Hectospec…

astro-ph.GA2021

Implications of Increased Central Mass Surface Densities for the Quenching of Low-mass Galaxies

Yicheng Guo, Timothy Carleton, Eric F. Bell +12

We use the Cosmic Assembly Deep Near-infrared Extragalactic Legacy Survey (CANDELS) data to study the relationship between quenching and the stellar mass surface density within the…

PEARLS: Two Distinct Populations of AGN Hosts Moving Between Star Formation and Quiescence

Gibson B. Bowling, Rafael Ortiz, S. P. Willner +29

We present the results of AGN--host-galaxy decomposition using JWST/NIRCam, HST/ACS, and HST/WFC3 imaging of the North Ecliptic Pole Time Domain Field (NEP-TDF). The light-profiles…

astro-ph.IM2025

SKYSURF VIII -- Modeling SKYSURF Completeness Data for Comparison to the Hubble Space Telescope Exposure Time Calculator

Zachary Goisman, Timothy Carleton, Seth H. Cohen +4

Accurately assessing image source completeness is critical for interpreting measurements on telescope data. Using the Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (AC…

The Lyman Continuum Escape Fraction of Star-forming Galaxies at $2.4 ≲ z ≲ 3.0$ from UVCANDELS

Xin Wang, Harry I. Teplitz, Brent M. Smith +74

The UltraViolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) survey is a Hubble Space Telescope (HST) Cycle-26 Treasury Program,…

astro-ph.GA2019

The Formation of Ultra Diffuse Galaxies in Cored Dark Matter Halos Through Tidal Stripping and Heating

Timothy Carleton, RaphaÃ«l Errani, Michael Cooper +3

We propose that the Ultra-Diffuse Galaxy (UDG) population represents a set of satellite galaxies born in $\sim 1 0^{10} - 1 0^{11}$ M $_{⊙}$ halos, similar to field dwarfs, which suffe…

astro-ph.HE2025

PEARLS: NuSTAR and XMM-Newton Extragalactic Survey of the JWST North Ecliptic Pole Time-domain Field III

Ross Silver, Francesca Civano, Xiurui Zhao +28

The James Webb Space Telescope (JWST) North Ecliptic Pole (NEP) Time-Domain Field (TDF) has been monitored by NuSTAR and XMM-Newton with a regular cadence for five years starting i…

The Distribution of Quenched Galaxies in the Massive z = 0.87 Galaxy Cluster El Gordo

Rachel Honor, Seth Cohen, Timothy Carleton +27

El Gordo (ACT-CL J0102 $-$ 4915) is a massive galaxy cluster with two major mass components at redshift $z = 0.87$ . Using SED fitting results from JWST/NIRCam photometry, the fraction…

We Must Preserve Hubble given its Unique Complementarity to Webb, Roman, and Euclid

Rogier A. Windhorst, Gibson B. Bowling, Kevin S. Croker +17

We present compelling arguments -- focusing on galaxy science -- for preserving the main imagers and operational modes of the Hubble Space Telescope (HST) for as long as is technic…

Birds of a Feather: Resolving Stellar Mass Assembly With JWST/NIRCam in a Pair of Kindred $z \sim 2$ Dusty Star-forming Galaxies Lensed by the PLCK G165.7+67.0 Cluster

Patrick S. Kamieneski, Brenda L. Frye, Rogier A. Windhorst +38

We present a new parametric lens model for the G165.7+67.0 galaxy cluster, which was discovered with $P l an c k$ through its bright submillimeter flux, originating from a pair of extr…

Forecasting the Observable Rates of Gravitationally Lensed Supernovae for the PASSAGES Dusty Starbursts

Patrick S. Kamieneski, Rogier A. Windhorst, Brenda L. Frye +19

More than 60 years have passed since the first formal suggestion to use strongly-lensed supernovae to measure the expansion rate of the Universe through time-delay cosmography. Yet…

Extreme Metallicity Dwarf Galaxies in IllustrisTNG

Timothy Carleton, Jacqueline Monkiewicz

The use of extremely metal-deficient dwarf galaxies (XMDs) as nearby analogs for high-redshift protogalaxies is generating renewed interest due to recent JWST observations studying…

JWST's PEARLS: A z=6 quasar in a train-wreck galaxy merger system

Madeline A. Marshall, Rogier A. Windhorst, Giovanni Ferrami +35

We present JWST NIRSpec integral field spectroscopy observations of the z=5.89 quasar NDWFS J1425+3254 from 0.6-5.3 microns, covering the rest-frame ultraviolet and optical at a sp…

JWST NIRCam Photometry: A Study of Globular Clusters Surrounding Bright Elliptical Galaxy VV 191a at z=0.0513

Jessica M. Berkheimer, Timothy Carleton, Rogier A. Windhorst +22

James Webb Space Telescope NIRCam images have revealed 154 reliable globular cluster (GC) candidates around the $z = 0.0513$ elliptical galaxy VV~191a after subtracting 34 likely i…

The UV luminosity function at 0.6 < z < 1 from UVCANDELS

Lei Sun, Xin Wang, Harry I. Teplitz +75

UVCANDELS is a HST Cycle-26 Treasury Program awarded 164 orbits of primary ultraviolet (UV) F275W imaging and coordinated parallel optical F435W imaging in four CANDELS fields: GOO…

PEARLS: Low Stellar Density Galaxies in the El Gordo Cluster Observed with JWST

Timothy Carleton, Seth H. Cohen, Brenda Frye +23

A full understanding of how unusually large "Ultra Diffuse Galaxies" (UDGs) fit into our conventional understanding of dwarf galaxies remains elusive, despite the large number of o…

SKYSURF-3: Testing Crowded Object Catalogs in the Hubble eXtreme Deep Field Mosaics to Study Sample Incompleteness from an Extragalactic Background Light Perspective

Darby Kramer, Timothy Carleton, Seth H. Cohen +6

Extragalactic Background Light (EBL) studies have revealed a significant discrepancy between direct measurements -- via instruments measuring "bare" sky from which Zodiacal and Gal…

SKYSURF: Constraints on Zodiacal Light and Extragalactic Background Light through Panchromatic HST All-Sky Surface-Brightness Measurements: I. Survey Overview and Methods

Rogier A. Windhorst, Timothy Carleton, Rosalia O'Brien +35

We give an overview and describe the rationale, methods, and testing of the Hubble Space Telescope (HST) Archival Legacy project "SKYSURF." SKYSURF uses HST's unique capability as…

astro-ph.GA2022

The Dwarf Galaxy Population at $z \sim 0.7$ : A Catalog of Emission Lines and Redshifts from Deep Keck Observations

John Pharo, Yicheng Guo, Guillermo Barro Calvo +18

We present a catalog of spectroscopically measured redshifts over $0 < z < 2$ and emission line fluxes for 1440 galaxies. The majority ( $\sim$ 65\%) of the galaxies come from the HA…

astro-ph.CO2019

Astrophysical Tests of Dark Matter with Maunakea Spectroscopic Explorer

Ting S. Li, Manoj Kaplinghat, Keith Bechtol +27

We discuss how astrophysical observations with the Maunakea Spectroscopic Explorer (MSE), a high-multiplexity (about 4300 fibers), wide field-of-view (1.5 square degree), large tel…

PEARLS: A Potentially Isolated Quiescent Dwarf Galaxy with a TRGB Distance of 30 Mpc

Timothy Carleton, Timothy Ellsworth-Bowers, Rogier A. Windhorst +25

A wealth of observations have long suggested that the vast majority of isolated classical dwarf galaxies ( $M_{*} = 1 0^{7}$ - $1 0^{9}$ M $_{⊙}$ ) are currently star-forming. However, recent o…

astro-ph.IM2023

SKYSURF-4: Panchromatic HST All-Sky Surface-Brightness Measurement Methods and Results

Rosalia O'Brien, Timothy Carleton, Rogier A. Windhorst +22

The diffuse, unresolved sky provides most of the photons that the Hubble Space Telescope (HST) receives, yet remains poorly understood. HST Archival Legacy program SKYSURF aims to…