No Redshift Evolution of Dust Temperatures from $0<z<2$

Abstract

Some recent literature has claimed there to be an evolution in galaxies' dust temperatures towards warmer (or colder) spectral energy distributions (SEDs) between low and high redshift. These conclusions are driven by both theoretical models and empirical measurement. Such claims sometimes contradict one another and are prone to biases in samples or SED fitting techniques. What has made direct comparisons difficult is that there is no uniform approach to fitting galaxies' infrared/millimeter SEDs. Here we aim to standardize the measurement of galaxies' dust temperatures with a python-based SED fitting procedure, MCIRSED. We draw on reference datasets observed by IRAS, Herschel, and Scuba-2 to test for redshift evolution out to $z\sim 2$. We anchor our work to the L${}_{IR}$-${\lambda }_{peak}$ plane, where there is an empirically observed anti-correlation between IR luminosity and rest-frame peak wavelength (an observational proxy for luminosity-weighted dust temperature) such that ${\lambda }_{peak}={\lambda }_t(L_{IR}/L_t{)}^{\eta }$ where $\eta =-0.09\pm 0.01$, L${}_t=10^{12}$ L${}_{\odot }$, and ${\lambda }_t=92\pm 2\mu$m. We find no evidence for redshift evolution of galaxies' temperatures, or ${\lambda }_{peak}$, at fixed L${}_{IR}$ from $0<z<2$ with >99.99% confidence. Our finding does not preclude evolution in dust temperatures at fixed stellar mass, which is expected from a non-evolving L${}_{IR}$-${\lambda }_{peak}$ relation and a strongly evolving SFR-M${}_{\star }$ relation. The breadth of dust temperatures at a given L${}_{IR}$ is likely driven by variation in galaxies' dust geometries and sizes and does not evolve. Testing for L${}_{IR}$-${\lambda }_{peak}$ evolution toward higher redshift ($z\sim 5-6$) requires better sampling of galaxies' dust SEDs near their peaks (observed $\sim$200-600$\mu$m) with $<$1 mJy sensitivity. This poses a significant challenge to current instrumentation.

27 pages, 10 figures. Accepted for publication in the Astrophysical Journal on March 23, 2022

References in corpus (35)

• The NumPy array: a structure for efficient numerical computation
• Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
• The Cosmic Evolution Survey (COSMOS) -- Overview
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• An ALMA survey of Sub-millimeter Galaxies in the Extended Chandra Deep Field South: Physical properties derived from ultraviolet-to-radio modelling
• The 0.4 < z < 1.3 star formation history of the Universe as viewed in the far-infrared
• The VLA-COSMOS Survey: II. Source Catalog of the Large Project
• Kiloparsec-scale dust disks in high-redshift luminous submillimeter galaxies
• Evolution of the dust emission of massive galaxies up to z=4 and constraints on their dominant mode of star formation
• AzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue
• Dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0<z<4
• The Herschel-ATLAS Data Release 1 Paper I: Maps, Catalogues and Number Counts
• Evidence for a Population of High-Redshift Submillimeter Galaxies from Interferometric Imaging
• Dust in starburst nuclei and ULIRGs: SED models for observers
• The Evolution of the IR Luminosity Function and Dust-obscured Star Formation in the Last 13 Billion Years
• Dust attenuation, dust emission, and dust temperature in galaxies at z>=5: a view from the FIRE-2 simulations
• How to distinguish starbursts and quiescently star-forming galaxies: The `bimodal' submillimetre galaxy population as a case study
• Are high redshift Galaxies hot? - Temperature of z > 5 Galaxies and Implications on their Dust Properties
• The East Asian Observatory SCUBA--2 survey of the COSMOS field: unveiling 1147 bright sub-millimeter sources across 2.6 square degrees
• The 1-1000 micron SEDs of far-infrared galaxies
• Automated Mining of the ALMA Archive in the COSMOS Field (A3COSMOS): I. Robust ALMA Continuum Photometry Catalogs and Stellar Mass and Star Formation Properties for ~700 Galaxies at z=0.5-6
• ALMA Characterises the Dust Temperature of z ~ 5.5 Star-Forming Galaxies
• The Herschel-ATLAS Data Release 1 Paper II: Multi-wavelength counterparts to submillimetre sources
• Physical Characterization of an Unlensed Dusty Star-Forming Galaxy at $z=5.85$
• Accurate dust temperature determination in a $z=7.13$ galaxy
• Far-Infrared Properties of Spitzer-selected Luminous Starbursts
• SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-End Counts at 450 um
• The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles: The Largest Herschel Survey of the Extragalactic Sky
• A Millimetre Survey of Starburst Dominated Ultraluminous Infrared Galaxies at z~2
• The infrared compactness-temperature relation for quiescent and starburst galaxies
• A controlled study of cold dust content in galaxies from $z=0-2$
• The second Herschel-ATLAS Data Release - III: optical and near-infrared counterparts in the North Galactic Plane field
• The Physical Drivers of the Luminosity-Weighted Dust Temperatures in High-Redshift Galaxies

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