CEERS: MIRI deciphers the spatial distribution of dust-obscured star formation in galaxies at $0.1<z<2.5$

Abstract

[Abridged] We combined HST images from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey with JWST images from the Cosmic Evolution Early Release Science (CEERS) survey to measure the stellar and dust-obscured star formation distributions of a mass-complete ($>10^{10}{M}_{\odot }$) sample of 69 star-forming galaxies (SFGs) at $0.1<z<2.5$. Rest-mid-infrared (rest-MIR) morphologies (sizes and Sérsic indices) were determined using their sharpest Mid-InfraRed Instrument (MIRI) images dominated by dust emission. Rest-MIR Sérsic indices were only measured for the brightest MIRI sources ($S/N>75$; 35 galaxies). At lower $S/N$, simulations show that simultaneous measurements of the size and Sérsic index become unreliable. We extended our study to fainter sources ($S/N>10$; 69 galaxies) by fixing their Sérsic index to unity. The Sérsic index of bright galaxies ($S/N>75$) has a median value of 0.7, which, together with their axis ratio distribution, suggests a disk-like morphology in the rest-MIR. Galaxies above the main sequence (MS; i.e., starbursts) have rest-MIR sizes that are a factor 2 smaller than their rest-optical sizes. The median rest-optical to rest-MIR size ratio of MS galaxies increases with stellar mass, from 1.1 at $10^{9.8}{M}_{\odot }$ to 1.6 at $10^{11}{M}_{\odot }$. This mass-dependent trend resembles the one found in the literature between the rest-optical and rest-near-infrared sizes of SFGs, suggesting that it is due to radial color gradients affecting rest-optical sizes and that the sizes of the stellar and star-forming components of SFGs are, on average, consistent at all masses. There is, however, a small population of SFGs (15%) with a compact star-forming component embedded in a larger stellar structure. This could be the missing link between galaxies with an extended stellar component and those with a compact stellar component, the so-called blue nuggets.

Published in A&A. 18 pages, 14 figures

References in corpus (45)

• Array Programming with NumPy
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• The James Webb Space Telescope
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• Compaction and Quenching of High-z Galaxies in Cosmological Simulations: Blue and Red Nuggets
• CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
• Star formation in AEGIS field galaxies since z=1.1 . Staged galaxy formation, and a model of mass-dependent gas exhaustion
• The SCUBA-2 Cosmology Legacy Survey: 850um maps, catalogues and number counts
• Kiloparsec-scale dust disks in high-redshift luminous submillimeter galaxies
• X-CIGALE: fitting AGN/galaxy SEDs from X-ray to infrared
• The SCUBA-2 Cosmology Legacy Survey: ALMA resolves the rest-frame far-infrared emission of sub-millimeter galaxies
• Dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0<z<4
• GOODS-HERSCHEL: star formation, dust attenuation and the FIR-radio correlation on the Main Sequence of star-forming galaxies up to z~4
• COSMOS2020: The Galaxy Stellar Mass Function: the assembly and star formation cessation of galaxies at $0.2<z\le 7.5$
• The Constant Average Relationship between Dust-obscured Star Formation and Stellar Mass from $z=0$ to $z=2.5$
• CEERS Key Paper V: A triality on the nature of HST-dark galaxies
• Deconstructing the Galaxy Stellar Mass Function with UKIDSS and CANDELS: the Impact of Colour, Structure and Environment
• Early formation of massive, compact, spheroidal galaxies with classical profiles by violent disc instability or mergers
• CEERS Key Paper VI: JWST/MIRI Uncovers a Large Population of Obscured AGN at High Redshifts
• GOODS-ALMA 2.0: Source catalog, number counts, and prevailing compact sizes in 1.1 mm galaxies
• Connection Between Stellar Mass Distributions Within Galaxies and Quenching Since z =2
• H-alpha emission in local galaxies: star formation, time variability and the diffuse ionized gas
• Structural evolution in massive galaxies at z~2
• The SINS/zC-SINF Survey of z~2 Galaxy Kinematics: Rest-frame Morphology, Structure, and Colors from Near-infrared Hubble Space Telescope Imaging
• Rest-frame near-infrared sizes of galaxies at cosmic noon: objects in JWST's mirror are smaller than they appeared
• Half-mass radii of quiescent and star-forming galaxies evolve slowly from 0 < z < 2.5: implications for galaxy assembly histories
• The dust-continuum size of TNG50 galaxies at $z=1-5$: a comparison with the distribution of stellar light, stars, dust and H${}_2$
• The Main Sequence at $z\sim 1.3$ contains a sizable fraction of galaxies with compact star formation sizes: a new population of early post-starbursts?
• Revealing the Stellar Mass and Dust Distributions of Submillimeter Galaxies at Redshift 2
• Dissecting the size-mass and ${\Sigma }_1$-mass relations at 1.0 < z < 2.5: galaxy mass profiles and color gradients as a function of spectral shape
• The SCUBA-2 Cosmology Legacy Survey: The EGS deep field I - Deep number counts and the redshift distribution of the recovered Cosmic Infrared Background at 450 and 850 um
• Wet Compaction to a Blue Nugget: a Critical Phase in Galaxy Evolution
• Expectations of the size evolution of massive galaxies at $3\le z\le 6$ from the TNG50 simulation: the CEERS/JWST view
• A${}^3$COSMOS: A census on the molecular gas mass and extent of main-sequence galaxies across cosmic time
• GOODS-ALMA 2.0: Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching
• Sub-millimetre compactness as a critical dimension to understand the Main Sequence of star-forming galaxies
• Color gradients and half-mass radii of galaxies out to $z=2$ in the CANDELS/3D-HST fields: further evidence for important differences in the evolution of mass-weighted and light-weighted sizes
• Radio continuum size evolution of star-forming galaxies over 0.35 < z < 2.25
• JWST CEERS probes the role of stellar mass and morphology in obscuring galaxies
• CEERS: Spatially Resolved UV and mid-IR Star Formation in Galaxies at 0.2 < z < 2.5: The Picture from the Hubble and James Webb Space Telescopes
• CLEAR: The Evolution of Spatially Resolved Star Formation in Galaxies between $0.5\lesssim z\lesssim 1.7$ using H$\alpha$ Emission Line Maps
• Dust attenuation, dust content and geometry of star-forming galaxies
• Unveiling Sizes of Compact AGN Hosts with ALMA

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