JWST/MIRI unveils the stellar component of the GN20 dusty galaxy overdensity at $z$=4.05

Abstract

Despite the importance of the dusty star-forming galaxies (DSFGs) at $z$>2 for understanding the galaxy evolution in the early Universe, their stellar distributions traced by the near-IR emission were spatially unresolved until the arrival of the JWST. In this work we present, for the first time, a spatially-resolved morphological analysis of the rest-frame near-IR (~1.1-3.5$\mu$m) emission in DSFGs traced with the JWST/MIRI. In particular, we study the mature stellar component for the three DSFGs and a Lyman-break galaxy (LBG) present in an overdensity at $z$=4.05. Moreover, we use MIRI images along with UV to (sub)-mm ancillary photometric data to model their SEDs and extract their main physical properties. The sub-arcsec resolution MIRI images have revealed that the stellar component present a wide range of morphologies, from disc-like to compact and clump-dominated structures. These near-IR structures contrast with their UV emission, which is usually diffuse and off-centered. The SED fitting analysis shows that GN20 dominates the total SFR with a value ~2500 $M_{\odot }$yr${}^{-1}$ while GN20.2b has the highest stellar mass in the sample ($M_{\ast }$~2$\times$10${}^{11}$ $M_{\odot }$). The two DSFGs classified as LTGs (GN20 and GN20.2a) show high specific SFR (sSFR>30 Gyr${}^{-1}$) placing them above the star-forming main sequence (SFMS) at z~4 by >0.5 dex while the ETG (i.e.,GN20.2b) is compatible with the high-mass end of the main sequence. When comparing with other DSFGs in overdensities at $z$~2-7 we observe that our objects present similar SFRs, depletion times and projected separations. Nevertheless, the effective radii computed for GN20 and GN20.2a are up to two times larger than those of isolated galaxies observed in CEERS and ALMA-HUDF at similar redshifts. We interpret this difference in size as an effect of rapid growth induced by the dense environment.

arXiv comment13 pages, 6 figures, 3 tables. Accepted for publication in A&A

References in corpus (103)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Gaia Data Release 3: Summary of the content and survey properties
• Cosmic Star Formation History
• Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxies
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• CIGALE: a python Code Investigating GALaxy Emission
• Unveiling Dust-enshrouded Star Formation in the Early Universe: a Sub-mm Survey of the Hubble Deep Field
• A Deep Sub-millimeter Survey of Lensing Clusters: A New Window on Galaxy Formation and Evolution
• A Redshift Survey of the Submillimeter Galaxy Population
• Formation of Massive Galaxies at High Redshift: Cold Streams, Clumpy Disks and Compact Spheroids
• Analysis of galaxy SEDs from far-UV to far-IR with CIGALE: Studying a SINGS test sample
• The Star-formation Mass Sequence out to z=2.5
• The Relationship Between Stellar Light Distributions of Galaxies and their Formation Histories
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• A New Non-Parametric Approach to Galaxy Morphological Classification
• Dusty Star-Forming Galaxies at High Redshift
• Dusty star forming galaxies at high redshift
• A Dust-Obscured Massive Maximum-Starburst Galaxy at a Redshift of 6.34
• Dust Attenuation Curves in the Local Universe: Demographics and New Laws for Star-forming Galaxies and High-redshift Analogs
• Revisiting the Infrared Spectra of Active Galactic Nuclei with a New Torus Emission Model
• Star Formation and Dust Attenuation Properties in Galaxies from a Statistical UV-to-FIR Analysis
• Spitzer view on the evolution of star-forming galaxies from z=0 to z~3
• The James Webb Space Telescope Mission
• The Evolution of Galaxy Structure over Cosmic Time
• The Mid-Infrared Instrument for the James Webb Space Telescope I: Introduction
• The Evolution of Galaxy Mergers and Morphology at z<1.2 in the Extended Groth Strip
• Andromeda's Dust
• The optical morphologies of galaxies in the IllustrisTNG simulation: a comparison to Pan-STARRS observations
• A New Approach to Galaxy Morphology: I. Analysis of the Sloan Digital Sky Survey Early Data Release
• Two bright submillimeter galaxies in a z=4.05 proto-cluster in GOODS-North, and accurate radio-infrared photometric redshifts
• Structural and Photometric Classification of Galaxies - I. Calibration Based on a Nearby Galaxy Sample
• Smooth(er) Stellar Mass Maps in CANDELS: Constraints on the Longevity of Clumps in High-redshift Star-forming Galaxies
• A Unified Model for Galactic Discs: Star Formation, Turbulence Driving, and Mass Transport
• Lenstronomy: multi-purpose gravitational lens modelling software package
• Evolution of the dust emission of massive galaxies up to z=4 and constraints on their dominant mode of star formation
• The Intense Starburst HDF850.1 in a Galaxy Overdensity at z=5.2 in the Hubble Deep Field
• The Dust Attenuation Law in Galaxies
• Constraining the properties of AGN host galaxies with Spectral Energy Distribution modeling
• The Mid-Infrared Instrument for JWST, II: Design and Build
• The HDF-North SCUBA Super-map I: Submillimetre maps, sources and number counts
• Evidence for a clumpy, rotating gas disk in a submillimeter galaxy at z=4
• Quiescent galaxies 1.5 billion years after the Big Bang and their progenitors
• An extreme proto-cluster of luminous dusty starbursts in the early Universe
• The CANDELS/SHARDS multi-wavelength catalog in GOODS-N: Photometry, Photometric Redshifts, Stellar Masses, Emission line fluxes and Star Formation Rates
• A Massive Molecular Gas Reservoir in the z=5.3 Submillimeter Galaxy AzTEC-3
• The Evolution of the IR Luminosity Function and Dust-obscured Star Formation in the Last 13 Billion Years
• Imaging the molecular gas in a submm galaxy at z = 4.05: cold mode accretion or a major merger?
• The Hubble Deep Field North SCUBA Super-map III - Optical and near-infrared properties of submillimetre galaxies
• A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z>2
• "Super-deblended" Dust Emission in Galaxies: I. The GOODS-North Catalog and the Cosmic Star Formation Rate Density out to Redshift 6
• The Population of Giant Clumps in Simulated High-z Galaxies: In-situ and Ex-situ, Migration and Survival
• The ALPINE-ALMA [CII] Survey: Multi-Wavelength Ancillary Data and Basic Physical Measurements
• The kiloparsec-scale star formation law at redshift 4: wide-spread, highly efficient star formation in the dust-obscured starburst galaxy GN20
• CEERS Key Paper III: The Diversity of Galaxy Structure and Morphology at z=3-9 with JWST
• ALMA reveals potential evidence for spiral arms, bars, and rings in high-redshift submillimeter galaxies
• ISM properties of a Massive Dusty Star-Forming Galaxy discovered at z ~ 7
• Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations
• Automated Mining of the ALMA Archive in the COSMOS Field (A3COSMOS): II. Cold Molecular Gas Evolution out to Redshift 6
• The Mid-Infrared Instrument for the James Webb Space Telescope, III: MIRIM, The MIRI Imager
• Uv-to-fir analysis of spitzer/irac sources in the extended groth strip i: Multi-wavelength photometry and spectral energy distributions
• The Red Giant Branch in the Near-Infrared Colour-Magnitude Diagrams. I: The calibration of photometric indices
• EPOCHS VI: The Size and Shape Evolution of Galaxies since z ~ 8 with JWST Observations
• Star formation in galaxies at z~4-5 from the SMUVS survey: a clear starburst/main-sequence bimodality for Halpha emitters on the SFR-M* plane
• Dust and gas in luminous proto-cluster galaxies at z=4.05: the case for different cosmic dust evolution in normal and starburst galaxies
• Hidden in plain sight: a massive, dusty starburst in a galaxy protocluster at z=5.7 in the COSMOS field
• The modelling of intermediate-age stellar populations: I- near-infrared properties
• The IR Luminosity Functions of Rich Clusters
• High-resolution spectroscopic imaging of CO in a z=4.05 proto-cluster
• EVLA observations of a proto-cluster of molecular gas rich galaxies at z = 4.05
• GA-NIFS: The core of an extremely massive proto-cluster at the Epoch of Reionization probed with JWST/NIRSpec
• Confirming Herschel candidate protoclusters from ALMA/VLA CO observations
• S62 on a 9.9 yr Orbit around SgrA*
• Expectations of the size evolution of massive galaxies at $3\le z\le 6$ from the TNG50 simulation: the CEERS/JWST view
• High resolution study of the cluster complexes in a lensed spiral at redshift ~1.5; constraints on the bulge formation and disk evolution
• Reionization and the ISM/Stellar Origins with JWST and ALMA (RIOJA): The core of the highest redshift galaxy overdensity at $z=7.88$ confirmed by NIRSpec/JWST
• The Evolution of Dusty Star formation in Galaxy Clusters to z = 1: Spitzer IR Observations of the First Red-Sequence Cluster Survey
• The VIMOS Ultra-Deep Survey: A major merger origin for the high fraction of galaxies at $2<z<6$ with two bright clump
• Observation of S4716 -- a Star with a 4 yr Orbit around Sgr A*
• The hidden side of cosmic star formation at z > 3: Bridging optically-dark and Lyman break galaxies with GOODS-ALMA
• MIRI/JWST observations reveal an extremely obscured starburst in the z=6.9 system SPT0311-58
• ALMA Lensing Cluster Survey: an ALMA galaxy signposting a MUSE galaxy group at z=4.3 behind 'El Gordo'
• Stellar masses and star formation rates of lensed dusty star-forming galaxies from the SPT survey
• Resolving a dusty, star-forming SHiZELS galaxy at z=2.2 with HST, ALMA and SINFONI on kiloparsec scales
• (Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies III. Environments
• Sub-Millimetre Galaxies with Webb: Near-Infrared Counterparts and Multi-wavelength Morphology
• JWST CEERS probes the role of stellar mass and morphology in obscuring galaxies
• Merger induced clump formation in distant infrared luminous starburst galaxies
• Near-infrared emission lines in starburst galaxies at 0.5 < z < 0.9 : Discovery of a merger sequence of extreme obscurations
• Ultra-Red Galaxies Signpost Candidate Proto-Clusters at High Redshift
• Exploring a new definition of the green valley and its implications
• A relation of the PAH 3.3 um feature with star-forming activity for galaxies with a wide range of infrared luminosity
• The role of massive halos in the Star Formation History of the Universe
• Uncovering the stellar structure of the dusty star-forming galaxy GN20 at z=4.055 with MIRI/JWST
• The 3.3 micron PAH Emission as a Star Formation Rate Indicator
• A non-corotating gas component in an extreme starburst at z=4.3
• A deep search for molecular gas in two massive Lyman break galaxies at z=3 and 4: vanishing CO-emission due to low metallicity?
• Chaotic and Clumpy Galaxy Formation in an Extremely Massive Reionization-Era Halo
• The Ionised- and Cool-Gas Content of The BR1202-0725 System as seen by MUSE and ALMA
• Bright Lyman $\alpha$ emitters among Spitzer SMUVS galaxies in the MUSE/COSMOS field
• High resolution spectral imaging of CO(7-6), [CI](2-1) and continuum of three high-z lensed dusty star-forming galaxies using ALMA
• Clumpy star formation and an obscured nuclear starburst in the luminous dusty z=4 galaxy GN20 seen by MIRI/JWST

Cited by in corpus (3)

• GA-NIFS: High number of dual active galactic nuclei at z~3
• MIDIS. Near-infrared rest-frame morphology of massive galaxies at $3<z<5$ in the Hubble eXtreme Deep Field
• JWST reveals extended stellar disks for ALMA-bright dusty star-forming galaxies in the Spiderweb protocluster