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Early Results from GLASS-JWST. XIX: A High Density of Bright Galaxies at in the Abell 2744 Region
Marco Castellano, Adriano Fontana, Tommaso Treu +38
We report the detection of a high density of redshift galaxies behind the foreground cluster Abell 2744, selected from imaging data obtained recently with NIRCam onbo…
CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results
Micaela B. Bagley, Steven L. Finkelstein, Anton M. Koekemoer +34
We present the data release and data reduction process for the Epoch 1 NIRCam observations for the Cosmic Evolution Early Release Science Survey (CEERS). These data consist of NIRC…
The production of ionizing photons in UV-faint z~3-7 galaxies
Gonzalo Prieto-Lyon, Victoria Strait, Charlotte A. Mason +20
The demographics of the production and escape of ionizing photons from UV-faint early galaxies is a key unknown in discovering the primary drivers of reionization. With the advent…
Early results from GLASS-JWST. XIV: A spectroscopically confirmed protocluster 650 million years after the Big Bang
Takahiro Morishita, Guido Roberts-Borsani, Tommaso Treu +39
We present the spectroscopic confirmation of a protocluster at behind the galaxy cluster Abell2744 (hereafter A2744-z7p9OD). Using JWST NIRSpec, we find seven galaxies wit…
CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
Steven L. Finkelstein, Micaela B. Bagley, Henry C. Ferguson +64
We present an investigation into the first 500 Myr of galaxy evolution from the Cosmic Evolution Early Release Science (CEERS) survey. CEERS, one of 13 JWST ERS programs, targets g…
The VANDELS survey: the ionizing properties of star-forming galaxies at using deep rest-frame ultraviolet spectroscopy
A. Saldana-Lopez, D. Schaerer, J. Chisholm +13
To better understand the ionizing properties of galaxies in the EoR, we investigate deep, rest-frame ultraviolet (UV) spectra of star-forming galaxies at $3 \leq z \le…
CEERS Key Paper V: A triality on the nature of HST-dark galaxies
Pablo G. Pérez-González, Guillermo Barro, Marianna Annunziatella +52
The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR faint, mid-IR bright sources,…
The nature of an ultra-faint galaxy in the cosmic Dark Ages seen with JWST
Guido Roberts-Borsani, Tommaso Treu, Wenlei Chen +44
In the first billion years after the Big Bang, sources of ultraviolet (UV) photons are believed to have ionized intergalactic hydrogen, rendering the Universe transparent to UV rad…
CEERS Key Paper III: The Diversity of Galaxy Structure and Morphology at z=3-9 with JWST
Jeyhan S. Kartaltepe, Caitlin Rose, Brittany N. Vanderhoof +58
We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z=3-9 using early JWST CEERS NIRCam observation…
First Look at z > 1 Bars in the Rest-Frame Near-Infrared with JWST Early CEERS Imaging
Yuchen Guo, Shardha Jogee, Steven L. Finkelstein +45
Stellar bars are key drivers of secular evolution in galaxies and can be effectively studied using rest-frame near-infrared (NIR) images, which trace the underlying stellar mass an…
Identifying Galaxy Mergers in Simulated CEERS NIRCam Images using Random Forests
Caitlin Rose, Jeyhan S. Kartaltepe, Gregory F. Snyder +23
Identifying merging galaxies is an important - but difficult - step in galaxy evolution studies. We present random forest classifications of galaxy mergers from simulated JWST imag…
Early results from GLASS-JWST XIV: A first morphological atlas of the 1 < z < 5 Universe in the rest-frame optical
Colin Jacobs, Karl Glazebrook, Antonello Calabrò +20
We present a rest-frame optical morphological analysis of galaxies observed with the NIRCam imager on the James Webb Space Telescope (JWST) as part of the GLASS-JWST Early Release…
Early Results From GLASS-JWST. XVII: Building the First Galaxies -- Chapter 1. Star Formation Histories at 5<z < 7
A. Dressler, B. Vulcani, T. Treu +19
JWST observations of high redshift galaxies are used to measure their star formation histories - the buildup of stellar mass in the earliest galaxies. Here we use a novel analysis…
Early results from GLASS-JWST XV: properties of the faintest red sources in the NIRCAM deep fields
Karl Glazebrook, T. Nanayakkara, C. Jacobs +20
We present a first look at the reddest 2-5 sources found in deep images from the GLASS Early Release Science program. We undertake a general search, i.e. not looking for an…
Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations
Jorge A. Zavala, Veronique Buat, Caitlin M. Casey +121
Lyman Break Galaxy (LBG) candidates at z>10 are rapidly being identified in JWST/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-…
Early results from GLASS-JWST. VII: evidence for lensed, gravitationally bound proto-globular clusters at z=4 in the Hubble Frontier Field A2744
E. Vanzella, M. Castellano, P. Bergamini +29
We investigate the blue and optical rest-frame sizes (lambda~2300A-4000A) of three compact star-forming regions in a galaxy at z=4 strongly lensed (x30, x45, x100) by the Hubble Fr…
Early results from GLASS-JWST. IX: First spectroscopic confirmation of low-mass quiescent galaxies at with NIRISS
Danilo Marchesini, Gabriel Brammer, Takahiro Morishita +20
How passive galaxies form, and the physical mechanisms which prevent star formation over long timescales, are some of the most outstanding questions in understanding galaxy evoluti…
Early results from GLASS-JWST. VI: Extreme rest-optical equivalent widths detected in NIRISS Wide Field Slitless Spectroscopy
K. Boyett, S. Mascia, L. Pentericci +27
Wide Field Slitless Spectroscopy (WFSS) provides a powerful tool for detecting strong line emission in star forming galaxies (SFGs) without the need for target pre-selection. As pa…
The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
T. Treu, G. Roberts-Borsani, M. Bradac +43
The GLASS James Webb Space Telescope Early Release Science (hereafter GLASS-JWST-ERS) Program will obtain and make publicly available the deepest extragalactic data of the ERS camp…
Early results from GLASS-JWST XVI: Discovering a bluer z~4-7 Universe through UV slopes
Themiya Nanayakkara, Karl Glazebrook, Colin Jacobs +20
We use the GLASS-JWST Early Release Science NIRCam parallel observations to provide a first view of the UV continuum properties of NIRCam/F444W selected galaxies at 4<z<7. By combi…
Early results from GLASS-JWST. IV: Spatially resolved metallicity in a low-mass galaxy with NIRISS
Xin Wang, Tucker Jones, Benedetta Vulcani +19
We report the first gas-phase metallicity map of a distant galaxy measured with the James Webb Space Telescope (JWST). We use the NIRISS slitless spectroscopy acquired by the GLASS…
Early results from GLASS-JWST. V: the first rest-frame optical size-luminosity relation of galaxies at
Lilan Yang, T. Morishita, N. Leethochawalit +23
We present the first rest-frame optical size-luminosity relation of galaxies at , using the NIRCam imaging data obtained by the GLASS James Webb Space Telescope Early Release…
A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
Steven L. Finkelstein, Micaela B. Bagley, Pablo Arrabal Haro +117
We report the discovery of a candidate galaxy with a photo-z of z~12 in the first epoch of the JWST Cosmic Evolution Early Release Science (CEERS) Survey. Following conservative se…
The Physical Conditions of Emission-Line Galaxies at Cosmic Dawn from JWST/NIRSpec Spectroscopy in the SMACS 0723 Early Release Observations
Jonathan R. Trump, Pablo Arrabal Haro, Raymond C. Simons +61
We present rest-frame optical emission-line flux ratio measurements for five galaxies observed by the JWST Near-Infared Spectrograph (NIRSpec) in the SMACS 0723 Early Release…