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Near-infrared characterization of ultra-diffuse galaxies in Abell 2744 by JWST/NIRISS imaging
Ryota Ikeda, Takahiro Morishita, Takafumi Tsukui +10
We present a search and characterization of ultra-diffuse galaxies (UDGs) in the Frontier Fields cluster Abell~2744 at . We use JWST/NIRISS F200W observations, acquired as…
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…
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…
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…
Compact dust emission in a gravitationally lensed massive quiescent galaxy at z = 2.15 revealed in ~130 pc-resolution observations by ALMA
Takahiro Morishita, Abdurro'uf, Hiroyuki Hirashita +3
We present new observations of MRG-M2129, a quiescent galaxy at z = 2.15 with the Atacama Large Millimeter/submillimeter Array (ALMA). With the combination of the gravitational len…
Deep ALMA redshift search of a z~12 GLASS-JWST galaxy candidate
Tom J. L. C. Bakx, Jorge A. Zavala, Ikki Mitsuhashi +20
The James Webb Space Telescope (JWST) has discovered a surprising abundance of bright galaxy candidates in the very early Universe ( Myrs after the Big Bang), calling into q…
JWST Imaging of Earendel, the Extremely Magnified Star at Redshift
Brian Welch, Dan Coe, Erik Zackrisson +60
The gravitationally lensed star WHL0137-LS, nicknamed Earendel, was identified with a photometric redshift based on images taken with the Hubble Space Tele…
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…
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…
Dissecting Nearby Galaxies with piXedfit: II. Spatially Resolved Scaling Relations Among Stars, Dust, and Gas
Abdurro'uf, Yen-Ting Lin, Hiroyuki Hirashita +5
We study spatially resolved scaling relations among stars, dust, and gas in ten nearby spiral galaxies. In a preceding paper Abdurro'uf et al. (2022), we have derived spatially res…
Unresolved z~8 point sources and their impact on the bright end of the galaxy luminosity function
Yuzo Ishikawa, Takahiro Morishita, Massimo Stiavelli +7
The distribution and properties of the first galaxies and quasars are critical pieces of the puzzle in understanding galaxy evolution and cosmic reionization. Previous studies have…
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…
Early results from GLASS-JWST. II: NIRCam extra-galactic imaging and photometric catalog
Emiliano Merlin, Andrea Bonchi, Diego Paris +26
We present the reduced images and multi-wavelength catalog of the first JWST NIRCam extra-galactic observations from the GLASS Early Release Science Program, obtained as coordinate…
Physical Characterization of Early Galaxies in the Webb's First Deep Field SMACS J0723.3-7323
Takahiro Morishita, Massimo Stiavelli
This paper highlights initial photometric analyses of JWST NIRCam imaging data in the sightline of SMACS0723, aiming to identify galaxies at redshift . By applying a conservat…
Early results from GLASS-JWST VIII: An Extremely Magnified Blue Supergiant Star at Redshift 2.65 in the Abell 2744 Cluster Field
Wenlei Chen, Patrick L. Kelly, Tommaso Treu +18
We report the discovery of an extremely magnified star at redshift in James Webb Space Telescope (JWST) NIRISS pre-imaging of the Abell 2744 galaxy-cluster field. The star…
Early Results from GLASS-JWST. I: Confirmation of Lensed Lyman-Break Galaxies Behind the Abell 2744 Cluster With NIRISS
Guido Roberts-Borsani, Takahiro Morishita, Tommaso Treu +29
We present the first search for , continuum-confirmed sources with NIRISS/WFS spectroscopy over the Abell 2744 Frontier Fields cluster, as part of the GLASS-JWST ERS s…