Publications (26)
New Methods of Identifying AGN in the Early Universe using Spectroscopy and Photometry in the JWST Era
Flor Arevalo Gonzalez, Titanilla Braun, James Trussler +7
We explore spectroscopic and photometric methods for identifying high-redshift galaxies containing an Active Galactic Nucleus (AGN) with JWST observations. After demonstrating the…
JWST's PEARLS: Mothra, a new kaiju star at z=2.091 extremely magnified by MACS0416, and implications for dark matter models
J. M. Diego, Bangzheng Sun, Haojing Yan +28
We report the discovery of Mothra, an extremely magnified monster star, likely a binary system of two supergiant stars, in one of the strongly lensed galaxies behind the galaxy clu…
Tilting at the Turnover: Modeling the Faint-End of the UV Luminosity Function Behind Abell s1063 with JWST
Caio Moreira Goolsby, Christopher J. Conselice, Duncan Austin +6
We leverage the strong gravitational field of Abell S1063 to identify faint, highly magnified galaxies using ultra-deep James Webb Space Telescope (JWST)/NIRCam imaging from the GL…
MIGHTEE: A first look at MIGHTEE quasars
Sarah V. White, Ivan Delvecchio, Nathan Adams +6
In this work we study a robust, -band complete, spectroscopically-confirmed sample of 104 unobscured (Type-1) quasars within the COSMOS and XMM-LSS fields of the MeerKAT Inter…
EPOCHS Paper V. The dependence of galaxy formation on galaxy structure at z < 7 from JWST observations
Christopher J. Conselice, Justin T. F. Basham, Daniel O. Bettaney +11
We measure the broad impact of galaxy structure on galaxy formation by examining the ongoing star formation and integrated star formation history as revealed through the stellar ma…
Probing the origin of the kilonova candidate GRB 230307A: analysis of host galaxy and offset
Clecio R. Bom, Davi C. Rodrigues, Arianna Cortesi +12
We investigate the host galaxy of the long gamma-ray burst GRB 230307A, which is associated with a kilonova candidate likely produced by a binary neutron-star (BNS) merger. The tra…
A dual AGN at z = 5.4 associated with a Lyman-alpha Nebula in the Center of a Cosmic Filament
Qiong Li, Christopher J. Conselice, Qiao Duan +9
Predictions from current theories and simulations suggest that dual AGN systems are exceedingly rare at high redshifts. The intense radiation and powerful outflows from AGNs regula…
EPOCHS VIII. An Insight into MIRI-selected Galaxies in SMACS-0723 and the Benefits of Deep MIRI Photometry in Revealing AGN and the Dusty Universe
Qiong Li, Christopher J. Conselice, Nathan Adams +7
We present the analysis of the stellar population and star formation history of 181 MIRI selected galaxies at redshift 0-3.5 in the massive galaxy cluster field SMACS J0723.3-7327,…
EPOCHS VII: Discovery of high redshift () AGN candidates in JWST ERO and PEARLS data
Ignas Juodžbalis, Christopher J. Conselice, Maitrayee Singh +24
We present an analysis of a sample of robust high redshift galaxies selected photometrically from the `blank' fields of the Prime Extragalactic Areas for Reionization Science (PEAR…
The JWST Hubble Sequence: The Rest-Frame Optical Evolution of Galaxy Structure at
Leonardo Ferreira, Christopher J. Conselice, Elizaveta Sazonova +13
We present results on the morphological and structural evolution of a total of 4265 galaxies observed with JWST at in the JWST CEERS observations that overlap with th…
Like a candle in the wind: The embers of once aflame, now smouldering galaxies at
James Trussler, Christopher Conselice, Nathan Adams +8
We develop a photometric search method for identifying smouldering galaxies at , which are defined to have weak emission lines and thus generally have low specific star f…
EPOCHS Paper X: Environmental effects on Galaxy Formation and Protocluster Galaxy candidates at from JWST observations
Qiong Li, Christopher J. Conselice, Florian Sarron +16
In this paper we describe our search for galaxy protocluster candidates at and explore the environmental and physical properties of their member galaxies identified t…
Lonely Little Red Dots: Challenges to the AGN-nature of little red dots through their clustering and spectral energy distributions
MarÃa Carranza-Escudero, Christopher J. Conselice, Nathan Adams +31
Observations with the James Webb Space Telescope (JWST) reveal a previously unseen population of compact red objects, known as ``little red dots`` (LRDs). We study a new photometri…
Galaxy quenching at the high redshift frontier: A fundamental test of cosmological models in the early universe with JWST-CEERS
Asa F. L. Bluck, Christopher J. Conselice, Katherine Ormerod +10
We present an analysis of the quenching of star formation in massive galaxies () within the first 0.5 - 3 Gyr of the Universe's history utilizing JWST-CEERS…
EPOCHS IX. When cosmic dawn breaks: Evidence for evolved stellar populations in galaxies from PEARLS GTO and public NIRCam imaging
James A. A. Trussler, Christopher J. Conselice, Nathan Adams +28
The presence of evolved stars in high-redshift galaxies can place valuable indirect constraints on the onset of star formation in the Universe. Thus we use PEARLS GTO and public NI…
A Robust Study of High-Redshift Galaxies: Unsupervised Machine Learning for Characterising morphology with JWST up to z ~ 8
Clár-BrÃd Tohill, Steven Bamford, Christopher Conselice +4
Galaxy morphologies provide valuable insights into their formation processes, tracing the spatial distribution of ongoing star formation and encoding signatures of dynamical intera…
EPOCHS XI: The Structure and Morphology of Galaxies in the Epoch of Reionization to z ~ 12.5
Lewi Westcott, Christopher J. Conselice, Thomas Harvey +29
We present a structural analysis of 521 galaxy candidates at 6.5 < z < 12.5, with in the F444W filter, taken from the EPOCHS v1 sample, consisting of uniformly reduced…
Dust Extinction Measures for Galaxies using Machine Learning on JWST Imaging
Kwan Lin Kristy Fu, Christopher J. Conselice, Leonardo Ferreira +4
We present the results of a machine learning study to measure the dust content of galaxies observed with JWST at z > 6 through the use of trained neural networks based on high-reso…
Adding Value to JWST Spectra and Photometry: Stellar Population and Star Formation Properties of Spectroscopically Confirmed JADES and CEERS Galaxies at
Qiao Duan, Christopher J. Conselice, Qiong Li +5
In this paper, we discuss measurements of the stellar population and star forming properties for 43 spectroscopically confirmed publicly available high-redshift JWST galaxi…
Panic! At the Disks: First Rest-frame Optical Observations of Galaxy Structure at with JWST in the SMACS 0723 Field
Leonardo Ferreira, Nathan Adams, Christopher J. Conselice +13
We present early results regarding the morphological and structural properties of galaxies seen with the James Webb Space Telescope at in the Early Release Observations of…
Flexible Simulation Based Inference for Galaxy Photometric Fitting with Synthesizer
Thomas Harvey, Christopher C. Lovell, Sophie Newman +13
We introduce Synference, a new, flexible Python framework for galaxy SED fitting using simulation-based inference (SBI). Synference leverages the Synthesizer package for flexible f…
Reionization in Protocluster Environments at with JWST/NIRSpec
Qiong Li, Christopher J. Conselice, Duncan Austin +4
Understanding the role of high-redshift protoclusters in cosmic reionization is essential to unveiling the early stages of structure formation. Using deep imaging and spectroscopy…
A search for high-redshift direct-collapse black hole candidates in the PEARLS north ecliptic pole field
Armin Nabizadeh, Erik Zackrisson, Fabio Pacucci +31
Direct-collapse black holes (DCBHs) of mass - that form in HI-cooling halos in the early Universe are promising progenitors of the $\gtrsim 10^9 {M}_\odo…
LADUMA: Discovery of a luminous OH megamaser at
Marcin Glowacki, Jordan D. Collier, Amir Kazemi-Moridani +65
In the local Universe, OH megamasers (OHMs) are detected almost exclusively in infrared-luminous galaxies, with a prevalence that increases with IR luminosity, suggesting that they…
Environmental dependence of the Mass-Metallicity Star Formation Relations at z=4-10 with JWST
Qiong Li, Christopher J. Conselice, Lewi Westcott +8
We study how environment affects the mass-metallicity relation (MZR) at - using deep imaging and spectroscopy from the James Webb Space Telescope (JWST). Combining CEERS a…
EPOCHS I. The Discovery and Star Forming Properties of Galaxies in the Epoch of Reionization at with PEARLS and Public JWST data
Christopher J. Conselice, Nathan Adams, Thomas Harvey +32
We present in this paper the discovery, properties, and a catalog of 1165 high redshift galaxies found in deep JWST NIRCam imaging from the GTO PEARLS survey combine…