Unveiling the Cosmic Gems Arc at $z\sim 10$ with JWST NIRCam

Abstract

We present recent JWST NIRCam imaging observations of SPT0615-JD (also known as the Cosmic Gems Arc), lensed by the galaxy cluster SPT-CL J0615-5746. The 5 arcsec long arc is the most highly magnified $z>10$ galaxy known. It straddles the lensing critical curve and reveals five star clusters with radii of $\sim 1$ pc or less. We measure the full arc to have F200W 24.5 AB mag, consisting of two mirror images, each 25.3 AB mag with a median magnification of $\mu \sim 60_{-8}^{+17}$ (delensed 29.7 AB mag, $M_{UV}=-17.8$). The galaxy has an extremely strong Lyman break F115W$-$F200W $>3.2$ mag ($2\sigma$ lower limit), is undetected in all bluer filters ($<2\sigma$), and has a very blue continuum slope redward of the break ($\beta =-2.7\pm 0.1$). This results in a photometric redshift $z_{phot}=10.2\pm 0.2$ (95% confidence) with no significant likelihood below $z<9.8$. Based on spectral energy distribution fitting to the total photometry, we estimate an intrinsic stellar mass of $M_{\ast }\sim 2.4-5.6\times 10^7{M}_{\odot }$, young mass-weighted age of $\sim 21-79$ Myr, low dust content ($A_V<0.15$), and a low metallicity of $\lesssim 1\%Z_{\odot }$. We identify a fainter third counterimage candidate within 2.2 arcsec of the predicted position, lensed to AB mag 28.4 and magnified by $\mu \sim 2$, suggesting the fold arc may only show $\sim 60$% of the galaxy. SPT0615-JD is a unique laboratory to study star clusters observed within a galaxy just 460 Myr after the Big Bang.

arXiv comment22 pages, 8 figures, 4 tables, accepted by ApJ

References in corpus (67)

• Stellar population synthesis at the resolution of 2003
• A Universal Density Profile from Hierarchical Clustering
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• EAZY: A Fast, Public Photometric Redshift Code
• The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
• The propagation of uncertainties in stellar population synthesis modeling III: model calibration, comparison, and evaluation
• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• Inferring the star-formation histories of massive quiescent galaxies with BAGPIPES: Evidence for multiple quenching mechanisms
• A Bayesian approach to strong lensing modelling of galaxy clusters
• Reevaluating Old Stellar Populations
• Dust Attenuation Curves in the Local Universe: Demographics and New Laws for Star-forming Galaxies and High-redshift Analogs
• 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
• An updated analytic model for the attenuation by the intergalactic medium
• Two Remarkably Luminous Galaxy Candidates at $z\approx 10-12$ Revealed by JWST
• The Science Performance of JWST as Characterized in Commissioning
• The evolution of the galaxy UV luminosity function at redshifts z ~ 8-15 from deep JWST and ground-based near-infrared imaging
• JADES NIRSpec Spectroscopy of GN-z11: Lyman-$\alpha$ emission and possible enhanced nitrogen abundance in a $z=10.60$ luminous galaxy
• A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
• The Mass Distribution of SDSS J1004+4112 Revisited
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• Spectral synthesis including massive binaries
• Discovery and properties of ultra-high redshift galaxies ($9<z<12$) in the JWST ERO SMACS 0723 Field
• An SZ-selected sample of the most massive galaxy clusters in the 2500-square-degree South Pole Telescope survey
• CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results
• The propagation of uncertainties in stellar population synthesis modeling II: The challenge of comparing galaxy evolution models to observations
• Black hole growth through hierarchical black hole mergers in dense star clusters: implications for gravitational wave detections
• Revealing Galaxy Candidates out to $z\sim 16$ with JWST Observations of the Lensing Cluster SMACS0723
• Concurrent formation of supermassive stars and globular clusters: implications for early self-enrichment
• RELICS: Reionization Lensing Cluster Survey
• A JWST/NIRCam Study of Key Contributors to Reionization: The Star-forming and Ionizing Properties of UV-faint $z\sim 7-8$ Galaxies
• Precise Strong Lensing Mass Modeling of Four Hubble Frontier Fields Clusters and a Sample of Magnified High-Redshift Galaxies
• Spectroscopic Confirmation of CEERS NIRCam-selected Galaxies at $\mathbf{z}\simeq 8-10$
• JADES Imaging of GN-z11: Revealing the Morphology and Environment of a Luminous Galaxy 430 Myr After the Big Bang
• CEERS Spectroscopic Confirmation of NIRCam-Selected z > 8 Galaxy Candidates with JWST/NIRSpec: Initial Characterization of their Properties
• Constraining the mass distribution of galaxies using galaxy-galaxy lensing in clusters and in the field
• EIGER II. first spectroscopic characterisation of the young stars and ionised gas associated with strong H$\beta$ and [OIII] line-emission in galaxies at z=5-7 with JWST
• ACS imaging of 25 galaxies in nearby groups and in the field
• JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc
• Combined reconstruction of weak and strong lensing data with WSLAP
• Diagnostics for PopIII galaxies and Direct Collapse Black Holes in the early universe
• Non-parametric inversion of strong lensing systems
• Star formation at the smallest scales; A JWST study of the clump populations in SMACS0723
• Spectral Templates Optimal for Selecting Galaxies at z > 8 with JWST
• Planck Early Results XXVI: Detection with Planck and confirmation by XMM-Newton of PLCK G266.6-27.3, an exceptionally X-ray luminous and massive galaxy cluster at z~1
• The Sparkler: Evolved High-Redshift Globular Clusters Captured by JWST
• Did Globular Clusters Reionize the Universe?
• The nature of an ultra-faint galaxy in the cosmic Dark Ages seen with JWST
• Formation histories of stars, clusters and globular clusters in the E-MOSAICS simulations
• A Candidate $z\sim 10$ Galaxy Strongly Lensed into a Spatially Resolved Arc
• A luminous and young galaxy at z=12.33 revealed by a JWST/MIRI detection of Hα and [OIII]
• Two Epochs of Globular Cluster Formation from Deep Fields Luminosity Functions: Implications for Reionization and the Milky Way Satellites
• Early results from GLASS-JWST. VII: evidence for lensed, gravitationally bound proto-globular clusters at z=4 in the Hubble Frontier Field A2744
• Fast Calculation of Gravitational Lensing Properties of Elliptical Navarro-Frenk-White and Hernquist Density Profiles
• Clues on the Missing Sources of Reionization from Self-consistent Modeling of Milky Way and Dwarf Galaxy Globular Clusters
• JWST reveals a possible $z\sim 11$ galaxy merger in triply-lensed MACS0647$-$JD
• Identification of High-Redshift Galaxy Overdensities in GOODS-N and GOODS-S
• Spatially Resolved Stellar Populations of $0.3<z<6.0$ Galaxies in WHL0137-08 and MACS0647+70 Clusters as Revealed by JWST: How do Galaxies Grow and Quench Over Cosmic Time?
• Simulating Star Clusters Across Cosmic Time: II. Escape Fraction of Ionizing Photons from Molecular Clouds
• JWST catches the assembly of a $z\sim 5$ ultra-low-mass galaxy
• RELICS: Small-scale Star Formation in Lensed Galaxies at $z=6-10$
• RELICS: A Strong Lens Model for SPT-CLJ0615-5746, a z=0.972 Cluster
• Dissecting the RELICS cluster SPT-CLJ0615-5746 through the intracluster light: confirmation of the multiple merging state of the cluster formation

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