Early Results from GLASS-JWST. XIX: A High Density of Bright Galaxies at $z\approx 10$ in the Abell 2744 Region

Abstract

We report the detection of a high density of redshift $z\approx 10$ galaxies behind the foreground cluster Abell 2744, selected from imaging data obtained recently with NIRCam onboard {\it JWST} by three programs -- GLASS-JWST, UNCOVER, and DDT\#2756. To ensure robust estimates of the lensing magnification $\mu$, we use an improved version of our model that exploits the first epoch of NIRCam images and newly obtained MUSE spectra, and avoids regions with $\mu >5$ where the uncertainty may be higher. We detect seven bright $z\approx 10$ galaxies with demagnified rest-frame $-22\lesssim M_{\mathrm{UV}}\lesssim -19$ mag, over an area of $\sim 37$ sq. arcmin. Taking into account photometric incompleteness and the effects of lensing on luminosity and cosmological volume, we find that the density of $z\approx 10$ galaxies in the field is about $10\times$ ($3\times$) larger than the average at $M_{UV}\approx -21(-20)$ mag reported so far. The density is even higher when considering only the GLASS-JWST data, which are the deepest and the least affected by magnification and incompleteness. The GLASS-JWST field contains 5 out of 7 galaxies, distributed along an apparent filamentary structure of 2 Mpc in projected length, and includes a close pair of candidates with $M_{\mathrm{UV}}<-20$ mag having a projected separation of only 16 kpc. These findings suggest the presence of a $z\approx 10$ overdensity in the field. In addition to providing excellent targets for efficient spectroscopic follow-up observations, our study confirms the high density of bright galaxies observed in early {\it JWST} observations, but calls for multiple surveys along independent lines of sight to achieve an unbiased estimate of their average density and a first estimate of their clustering.

Accepted for publication in ApJL, 13 pages, 4 figures

References in corpus (42)

• EAZY: A Fast, Public Photometric Redshift Code
• A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
• CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
• Two Remarkably Luminous Galaxy Candidates at $z\approx 10-12$ Revealed by JWST
• The evolution of the galaxy UV luminosity function at redshifts z ~ 8-15 from deep JWST and ground-based near-infrared imaging
• New Determinations of the UV Luminosity Functions from z~9 to z~2 show a remarkable consistency with halo growth and a constant star formation efficiency
• A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• Stress Testing $\Lambda$CDM with High-redshift Galaxy Candidates
• The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
• Identification and properties of intense star-forming galaxies at redshifts z>10
• The JWST Early Release Observations
• Galaxy Formation and Reionization: Key Unknowns and Expected Breakthroughs by the James Webb Space Telescope
• The brightest galaxies at Cosmic Dawn
• A lack of evolution in the very bright-end of the galaxy luminosity function from z = 8-10
• Evolution of the UV LF from z~15 to z~8 Using New JWST NIRCam Medium-Band Observations over the HUDF/XDF
• A Geometrically Supported $z\sim 10$ Candidate Multiply-Imaged by the Hubble Frontier Fields Cluster Abell 2744
• UV Luminosity Density Results at z>8 from the First JWST/NIRCam Fields: Limitations of Early Data Sets and the Need for Spectroscopy
• Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations
• Early results from GLASS-JWST. XIV: A spectroscopically confirmed protocluster 650 million years after the Big Bang
• A Census of the Bright z=8.5-11 Universe with the Hubble and Spitzer Space Telescopes in the CANDELS Fields
• The Hawk-I UDS and GOODS Survey (HUGS): Survey design and deep K-band number counts
• Has JWST already falsified dark-matter-driven galaxy formation?
• Constraints on the star-formation rate of z~3 LBGs with measured metallicity in the CANDELS GOODS-South field
• Early results from GLASS-JWST. XI: Stellar masses and mass-to-light ratio of z>7 galaxies
• High-Redshift Galaxies from Early JWST Observations: Constraints on Dark Energy Models
• Blue Monsters. Why are JWST super-early, massive galaxies so blue?
• New high-precision strong lensing modeling of Abell 2744. Preparing for JWST observations
• Deep ALMA redshift search of a z~12 GLASS-JWST galaxy candidate
• Physical Characterization of Early Galaxies in the Webb's First Deep Field SMACS J0723.3-7323
• The production of ionizing photons in UV-faint z~3-7 galaxies
• Early results from GLASS-JWST. II: NIRCam extra-galactic imaging and photometric catalog
• Dusty winds clear JWST super-early galaxies
• Sizes of Lensed Lower-luminosity z=4-8 Galaxies from the Hubble Frontier Field Program
• Early results from GLASS-JWST. X: Rest-frame UV-optical properties of galaxies at 7 < z < 9
• The Cosmic Timeline Implied by the JWST High-redshift Galaxies
• A lensed protocluster candidate at $z=7.66$ identified in JWST observations of the galaxy cluster SMACS0723-7327
• The Physical Properties of Luminous $z\gtrsim 8$ Galaxies and Implications for the Cosmic Star Formation Rate Density From $\sim$0.35 deg${}^2$ of (Pure-)Parallel HST Observations
• Characterization and modeling of contamination for Lyman break galaxy samples at high redshift
• The size-luminosity relation of lensed galaxies at $z=6-9$ in the Hubble Frontier Fields
• Webb's PEARLS: Bright 1.5--2.0 micron Dropouts in the Spitzer/IRAC Dark Field
• Interpreting ALMA non-detections of JWST super-early galaxies

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• Life beyond 30: probing the -20<M_UV<-17 luminosity function at 8<z<13 with the NIRCam parallel field of the MIRI Deep Survey
• JWST UNCOVER: Extremely red and compact object at$z_{\mathrm{phot}}\simeq 7.6$ triply imaged by Abell 2744
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• JWST UNCOVER: Discovery of $z>9$ Galaxy Candidates Behind the Lensing Cluster Abell 2744
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• Alleviating the need for exponential evolution of JWST galaxies in 10${}^{10}{M}_{\odot }$ haloes at $z>10$ by a modified $\Lambda$CDM power spectrum
• Gravitational Wave Astronomy With TianQin
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• Seven wonders of Cosmic Dawn: JWST confirms a high abundance of galaxies and AGNs at z $\simeq$ 9-11 in the GLASS field
• ASTRODEEP-JWST: NIRCam-HST multiband photometry and redshifts for half a million sources in six extragalactic deep fields
• The GLASS-JWST Early Release Science Program. II. Stage I release of NIRCam imaging and catalogs in the Abell 2744 region
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• Synergising semi-analytical models and hydrodynamical simulations to interpret JWST data from the first billion years
• ALMA Observation of a $z\gtrsim 10$ Galaxy Candidate Discovered with JWST
• AGN X-ray luminosity function and absorption function in the Early Universe ($3\le z\le 6$)
• Metal and dust evolution in ALMA REBELS galaxies: insights for future JWST observations
• Exploiting synergies between JWST and cosmic 21-cm observations to uncover star formation in the early Universe
• How do Primordial Black Holes change the Halo Mass Function and Structure?
• The cosmological star formation history from the Local Cosmological Volume of galaxies and constraints on the matter homogeneity
• Modelling the star-formation activity and ionizing properties of high-redshift galaxies
• Constraints on the state of the IGM at $z\sim 8-10$ using redshifted 21-cm observations with LOFAR
• The GLASS-JWST Early Release Science Program. IV. Data release of 263 spectra from 245 unique sources
• The Cosmic Evolution of Fast Radio Bursts Inferred from the CHIME/FRB Baseband Catalog 1
• ΛCDM is still not broken: empirical constraints on the star formation efficiency at z ~ 12-30
• Pushing JWST to the extremes: search and scrutiny of bright galaxy candidates at z$\simeq$15-30
• The first GLIMPSE of the faint galaxy population at Cosmic Dawn with JWST: The evolution of the ultraviolet luminosity function across z~9-15
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• Can Early Dark Energy be Probed by the High-Redshift Galaxy Abundance?
• The z = 9.625 Cosmic Gems Galaxy was a "Compact Blue Monster" Propelled by Massive Star Clusters
• Starlight from JWST: Implications for star formation and dark matter models
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• Insights on Metal Enrichment and Environmental Effect at $z\approx 5-7$ with JWST ASPIRE/EIGER and Chemical Evolution Model
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• Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection
• Narrowing the discovery space of the cosmological 21-cm signal using multi-wavelength constraints
• Type Ia Supernovae from First-generation Stars
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• Dynamical axisymmetric compact objects in General Relativity