Delving deep: a population of extremely dusty dwarfs observed by JWST

Abstract

We take advantage of the NIRCam photometric observations available as part of the Cosmic Evolution Early Release Science survey (CEERS) to identify and analyse very red sources in an effort to discover very dusty star forming galaxies. We select red galaxies as objects with a S/N>3 at 4.4 $\mu$m and a S/N<2 in all JWST and HST filters at $\lambda \le 2\mu$m, which corresponds to [F200W]-[F444W]>1.2 considering CEERS depths. This selection is ideal to identify very dusty (Av>1 mag) galaxies with stellar masses between $10^6$ to $10^{10}{\mathrm{M}}_{\odot }$ at z<5, more massive dusty galaxies at z=5-18 and galaxies at z>18 due to the Lyman absorption, independently of their dust extinction. Our sample of F200W-dropouts contains no strong candidates at z>6.5, instead it consists almost completely (~81%) of z<2 low-mass galaxies, with a median stellar mass of $10^{7.3}{\mathrm{M}}_{\odot }$. These galaxies show an exceptional dust extinction with median value of Av=4.9 mag, completely unexpected given their low stellar mass. The remaining galaxies, which are at z<6.5, show similar large dust extinction (Av>1), but they are generally more massive $>10^{7.5}{\mathrm{M}}_{\odot }$.

30 pages, 1 table, 19 figures, accepted for publication in A&A

References in corpus (41)

• Cosmic Star Formation History
• Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
• 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
• A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
• The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
• Discovery and properties of ultra-high redshift galaxies ($9<z<12$) in the JWST ERO SMACS 0723 Field
• CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results
• Star Formation at $4<z<6$ From the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)
• The Star Formation Main Sequence in the Hubble Space Telescope Frontier Fields
• GOODS-HERSCHEL: star formation, dust attenuation and the FIR-radio correlation on the Main Sequence of star-forming galaxies up to z~4
• The Constant Average Relationship between Dust-obscured Star Formation and Stellar Mass from $z=0$ to $z=2.5$
• 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
• Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations
• CEERS Key Paper V: A triality on the nature of HST-dark galaxies
• On the SFR-M${}_{\ast }$ main sequence archetypal star-formation history and analytical models
• Early Results from GLASS-JWST. XIX: A High Density of Bright Galaxies at $z\approx 10$ in the Abell 2744 Region
• A Census of the Bright z=8.5-11 Universe with the Hubble and Spitzer Space Telescopes in the CANDELS Fields
• First Batch of Candidate Galaxies at Redshifts 11 to 20 Revealed by the James Webb Space Telescope Early Release Observations
• Unveiling the Nature of Infrared Bright, Optically Dark Galaxies with Early JWST Data
• A first look at the SMACS0723 JWST ERO: spectroscopic redshifts, stellar masses and star-formation histories
• JWST unveils heavily obscured (active and passive) sources up to z~13
• Convolution kernels for multi-wavelength imaging
• The abundance of $z\gtrsim 10$ galaxy candidates in the HUDF using deep JWST NIRCam medium-band imaging
• Illuminating the dark side of cosmic star formation two billion years after the Big Bang
• A${}^3$COSMOS: The Dust Attenuation of Star-Forming Galaxies at $z=2.5-4.0$ from the COSMOS-ALMA Archive
• A new estimate of the cosmic star formation density from a radio-selected sample, and the contribution of $H$-dark galaxies at $z\ge 3$
• Analysis of the SFR - M* plane at z<3: single fitting versus multi-Gaussian decomposition
• GAMA/DEVILS: Constraining the cosmic star-formation history from improved measurements of the 0.3-2.2 micron Extragalactic Background Light
• The MOSDEF Survey: Implications of the Lack of Evolution in the Dust Attenuation-Mass Relation to z~2
• X-Ray Groups of Galaxies in the Aegis Deep and Wide Fields
• The hidden side of cosmic star formation at z > 3: Bridging optically-dark and Lyman break galaxies with GOODS-ALMA
• Massive galaxy formation caught in action at z~5 with JWST
• Webb's PEARLS: Bright 1.5--2.0 micron Dropouts in the Spitzer/IRAC Dark Field
• A z=1.85 galaxy group in CEERS: evolved, dustless, massive intra-halo light and a brightest group galaxy in the making
• SKYSURF-3: Testing Crowded Object Catalogs in the Hubble eXtreme Deep Field Mosaics to Study Sample Incompleteness from an Extragalactic Background Light Perspective

Cited by in corpus (14)

• Unveiling the hidden universe with JWST: The contribution of dust-obscured galaxies to the stellar mass function at $z\sim 3-8$
• JWST CEERS probes the role of stellar mass and morphology in obscuring galaxies
• Near-infrared emission line diagnostics for AGN from the local Universe to redshift 3
• JWST's PEARLS: resolved study of the stellar and dust components in starburst galaxies at cosmic noon
• Pushing JWST to the extremes: search and scrutiny of bright galaxy candidates at z$\simeq$15-30
• Halfway to the Peak: The JWST MIRI 5.6 micron number counts and source population
• Disentangling the co-evolution of galaxies and supermassive black holes with PRIMA
• What is the nature of Little Red Dots and what is not, MIRI SMILES edition
• Spectroscopic confirmation of a dust-obscured, metal-rich dwarf galaxy at z~5
• Euclid: Identifying the reddest high-redshift galaxies in the Euclid Deep Fields with gradient-boosted trees
• Mysteries of Capotauro: investigating the puzzling nature of an extreme F356W-dropout
• An optically-dark merging system at z~6 detected by JWST
• Ultra High-Redshift or Closer-by, Dust-Obscured Galaxies? Deciphering the Nature of Faint, Previously Missed F200W-Dropouts in CEERS
• HELM's deep: Highly Extincted Low-Mass galaxies seen by JWST