Dissecting the IRX - $\beta$ dust attenuation relation: exploring the physical origin of observed variations in galaxies

Abstract

The use of ultraviolet (UV) emission as a tracer of galaxy star-formation rate (SFR) is hampered by dust obscuration. The empirical relationship between UV slope, $\beta$, and the ratio between far-infrared and UV luminosity, IRX, is commonly employed to account for obscured UV emission. We present a simple model that explores the physical origin of variations in the IRX - $\beta$ dust attenuation relation. A relative increase in FUV attenuation compared to NUV attenuation and an increasing stellar population age cause variations towards red UV slopes for a fixed IRX. Dust geometry effects (turbulence, dust screen with holes, mixing of stars within the dust screen, two-component dust model) cause variations towards blue UV slopes. Poor photometric sampling of the UV spectrum causes additional observational variations. We provide an analytic approximation for the IRX - $\beta$ relation invoking a subset of the explored physical processes (dust type, stellar population age, turbulence). We discuss observed variations in the IRX - $\beta$ relation for local (sub-galactic scales) and high-redshift (normal and dusty star-forming galaxies, galaxies during the epoch of reionization) galaxies in the context of the physical processes explored in our model. High spatial resolution imaging of the UV and sub-mm emission of galaxies can constrain the IRX - $\beta$ dust attenuation relation for different galaxy types at different epochs, where different processes causing variations may dominate. These constraints will allow the use of the IRX - $\beta$ relation to estimate intrinsic SFRs of galaxies, despite the lack of a universal relation.

arXiv commentAccepted for publication in MNRAS

References in corpus (88)

• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• Star Formation in the Milky Way and Nearby Galaxies
• Dust Grain Size Distributions and Extinction in the Milky Way, LMC, and SMC
• The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
• Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• SINGS: The SIRTF Nearby Galaxies Survey
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• Interstellar Turbulence I: Observations and Processes
• Dust Absorption And The Ultraviolet Luminosity Density At z \approx 3 As Calibrated By Local Starburst Galaxies
• A General Theory of Turbulence-Regulated Star Formation, From Spirals to ULIRGs
• 3D-HST WFC3-selected Photometric Catalogs in the Five CANDELS/3D-HST Fields: Photometry, Photometric Redshifts and Stellar Masses
• Analysis of galaxy SEDs from far-UV to far-IR with CIGALE: Studying a SINGS test sample
• The Infrared Spectral Energy Distribution of Normal Star-Forming Galaxies: Calibration at Far-Infrared and Submillimeter Wavelengths
• The GALEX Ultraviolet Atlas of Nearby Galaxies
• Gas-to-Dust mass ratios in local galaxies over a 2 dex metallicity range
• The CO-to-H2 Conversion Factor From Infrared Dust Emission Across the Local Group
• Star Formation and Dust Attenuation Properties in Galaxies from a Statistical UV-to-FIR Analysis
• UV Luminosity Functions from 132 z~7 and z~8 Lyman-Break Galaxies in the ultra-deep HUDF09 and wide-area ERS WFC3/IR Observations
• The Abundance of Star-Forming Galaxies in the Redshift Range 8.5 to 12: New Results from the 2012 Hubble Ultra Deep Field Campaign
• The Interstellar Medium In Galaxies Seen A Billion Years After The Big Bang
• The Disruption of Giant Molecular Clouds by Radiation Pressure and the Efficiency of Star Formation in Galaxies
• Reddening and Star Formation in Starburst Galaxies
• Multi-Wavelength Constraints on the Cosmic Star Formation History from Spectroscopy: the Rest-Frame UV, H-alpha, and Infrared Luminosity Functions at Redshifts 1.9<z<3.4
• A dusty, normal galaxy in the epoch of reionization
• The Dust Attenuation Law in Distant Galaxies: Evidence for Variation with Spectral Type
• Grids of stellar models with rotation - III. Models from 0.8 to 120 Msun at a metallicity Z = 0.002
• Star formation and dust obscuration at z~2: galaxies at the dawn of downsizing
• Dust Obscuration and Metallicity at High Redshift: New Inferences from UV, H-alpha, and 8 Micron Observations of z~2 Star-Forming Galaxies
• Infared Observations of Nebular Emission Lines from Galaxies at z = 3
• Dust in the reionization era: ALMA observations of a $z$=8.38 Galaxy
• The Most Luminous z~9-10 Galaxy Candidates yet Found: The Luminosity Function, Cosmic Star-Formation Rate, and the First Mass Density Estimate at 500 Myr
• Dust attenuation in the nearby Universe: comparison between galaxies selected in the ultraviolet or in the infrared
• The Herschel Reference Survey
• The infrared side of galaxy formation. I. The local universe in the semi-analytical framework
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared Excess of UV-selected z=2-10 galaxies as a function of UV-continuum Slope and Stellar Mass
• Star formation history and dust attenuation in galaxies drawn from ultraviolet surveys
• The ISM in distant star-forming galaxies: Turbulent pressure, fragmentation and cloud scaling relations in a dense gas disk at z=2.3
• Radial distribution of stars, gas and dust in SINGS galaxies. II. Derived dust properties
• The dust content of galaxies from z = 0 to z = 9
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Survey Description
• GOODS-Herschel Measurements of the Dust Attenuation of Typical Star-Forming Galaxies at High Redshift: Observations of UV-Selected Galaxies at z~2
• Far-Infrared Galaxies in the Far-Ultraviolet
• The Chemical Evolution of Star-Forming Galaxies Over the Last 11 Billion Years
• New redshift z ~ 9 galaxies in the Hubble Frontier Fields: Implications for early evolution of the UV luminosity density
• Dust Attenuation in UV-selected Starbursts at High Redshift and their Local Counterparts: Implications for the Cosmic Star Formation Rate Density
• Are Dusty Galaxies Blue? Insights on UV Attenuation from Dust-Selected Galaxies
• A critical analysis of the UV-continuum slopes of high-redshift galaxies; no evidence (yet) for extreme stellar populations at z > 6
• UV Dust Attenuation in Star-forming Galaxies: II Calibrating the A(UV) vs. L_TIR/L_UV relation
• An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Near-infrared morphologies and stellar sizes
• First Frontier Field Constraints on the Cosmic Star-Formation Rate Density at z~10 - The Impact of Lensing Shear on Completeness of High-Redshift Galaxy Samples
• The IRX-beta relation on sub-galactic scales in star-forming galaxies of the Herschel Reference Survey
• Breaking the Curve with CANDELS: A Bayesian Approach to Reveal the Non-Universality of the Dust-Attenuation Law at High Redshift
• UV dust attenuation in normal star forming galaxies: I. Estimating the L_TIR/L_FUV ratio
• Detection of PAH and Far-Infrared Emission from the Cosmic Eye: Probing the Dust and Star Formation of Lyman Break Galaxies
• Inferred Hα Flux as a Star-Formation Rate Indicator at z ~ 4-5: Implications for Dust Properties, Burstiness, and the z = 4-8 Star-Formation-Rate Functions
• HerMES: Unveiling obscured star formation - the far infrared luminosity function of ultraviolet-selected galaxies at z~1.5
• Reexamination of the Infrared Excess-Ultraviolet Slope Relation of Local Galaxies
• Dust-Induced Systematic Errors in UV-Derived Star Formation Rates
• Dust input from AGB stars in the Large Magellanic Cloud
• UV dust attenuation in spiral galaxies: the role of age-dependent extinction and of the IMF
• Radiative Transfer Model of Dust Attenuation Curves in Clumpy, Galactic Environments
• Ultraviolet through Infrared Spectral Energy Distributions from 1000 SDSS Galaxies: Dust Attenuation
• Evolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey
• Dust properties of Lyman break galaxies at $z\sim 3$
• Attenuation caused by a distant Isothermal Turbulent Screen
• The First Billion Years project: constraining the dust attenuation law of star-forming galaxies at z $\simeq$ 5
• Spitzer Observations of the z=2.73 Lensed Lyman Break Galaxy, MS1512-cB58
• Dust attenuation in z $\sim$ 1 galaxies from Herschel and 3D-HST H$\alpha$ measurements
• Star-Forming or Starbursting? The Ultraviolet Conundrum
• Two-size approximation: a simple way of treating the evolution of grain size distribution in galaxies
• Starburst Galaxies: Why the Calzetti Dust Extinction Law?
• Interpreting the evolution of galaxy colours from $z=8$ to $z=5$
• Measuring Galaxy Star Formation Rates From Integrated Photometry: Insights from Color-Magnitude Diagrams of Resolved Stars
• The SCUBA-2 Cosmology Legacy Survey: the submillimetre properties of Lyman break galaxies at z=3-5
• Effects of grain growth mechanisms on the extinction curve and the metal depletion in the interstellar medium
• The Bright and Dark Sides of High-Redshift starburst galaxies from {\it Herschel} and {\it Subaru} observations
• Evidence for a wide range of UV obscuration in z ~ 2 dusty galaxies from the GOODS-Herschel survey
• FIR-detected Lyman break galaxies at z ~ 3: Dust attenuation and dust correction factors at high redshift
• The effects of dust in simple environments: Large Magellanic Cloud HII regions
• The Nature of the Second Parameter in the IRX-beta Relation for Local Galaxies
• GAMA/H-ATLAS: The ultraviolet spectral slope and obscuration in galaxies
• The IRX-$\beta$ relation: Insights from simulations
• Early Science with the Large Millimeter Telescope: Detection of dust emission in multiple images of a normal galaxy at $z>4$ lensed by a Frontier Fields cluster
• Shattering by turbulence as a production source of very small grains
• A resolved map of the infrared excess in a Lyman Break Galaxy at z=3
• Star Formation Rate and Extinction in Faint z~4 Lyman-Break Galaxies

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• Semi-analytic forecasts for JWST - I. UV luminosity functions at z = 4 - 10
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• The ALPINE-ALMA [CII] survey: Dust attenuation properties and obscured star formation at z~4.4-5.8
• The MOSDEF Survey: the Variation of the Dust Attenuation Curve with Metallicity
• The IRX-Beta Dust Attenuation Relation in Cosmological Galaxy Formation Simulations
• A spatially resolved study of cold dust, molecular gas, HII regions, and stars in the $z=2.12$ submillimeter galaxy ALESS67.1
• Dust Attenuation, Star Formation, and Metallicity in z ~ 2-3 Galaxies from KBSS-MOSFIRE
• Semi-analytic forecasts for JWST -- IV. Implications for cosmic reionization and LyC escape fraction
• Starburst to quiescent from HST/ALMA: Stars and dust unveil minor mergers in submillimeter galaxies at $z\sim 4.5$
• Cold dust and stellar emissions in dust-rich galaxies observed with ALMA: a challenge for SED-fitting techniques
• Warm dust in high-z galaxies: origin and implications
• Dust attenuation and Halpha emission in a sample of galaxies observed with Herschel at $0.6<z<1.6$
• Revealing the Stellar Mass and Dust Distributions of Submillimeter Galaxies at Redshift 2
• Powderday: Dust Radiative Transfer for Galaxy Simulations
• Confirming Herschel candidate protoclusters from ALMA/VLA CO observations
• On the nature and physical conditions of the luminous Lya emitter CR7 and its rest-frame UV components
• A${}^3$COSMOS: The Dust Attenuation of Star-Forming Galaxies at $z=2.5-4.0$ from the COSMOS-ALMA Archive
• The evolution of rest-frame UV properties, Lya EWs and the SFR-Stellar mass relation at z~2-6 for SC4K LAEs
• A direct calibration of the IRX-β relation in Lyman-break Galaxies at z=3-5
• Semi-analytic forecasts for JWST -- V. AGN luminosity functions and helium reionization at z = 2-7
• The SCUBA-2 Cosmology Legacy Survey: The EGS deep field - II. Morphological transformation and multi-wavelength properties of faint submillimetre galaxies
• Characterizing Dust Attenuation in Local Star Forming Galaxies: Inclination Effects and the 2175Å Feature
• Early results from GLASS-JWST XVI: Discovering a bluer z~4-7 Universe through UV slopes
• Diversity of Galaxy Dust Attenuation Curves Drives the Scatter in the IRX-beta Relation
• The IRX-$\beta$ relation of high-redshift galaxies
• The LOFAR Two-metre Sky Survey: the radio view of the cosmic star formation history
• A redshift-dependent IRX-$\beta$ dust attenuation relation for TNG50 galaxies
• SCUBA-2 Ultra Deep Imaging Eao Survey (Studies) III: Multi-wavelength properties, luminosity functions and preliminary source catalog of 450-$\mu$m-selected galaxies
• The ALPINE-ALMA [CII] survey: dust attenuation curves at z=4.4-5.5
• The ALMA-CRISTAL survey: Widespread dust-obscured star formation in typical star-forming galaxies at z=4-6
• How Well Can We Measure Galaxy Dust Attenuation Curves? The Impact of the Assumed Star-Dust Geometry Model in SED Fitting
• Intense CIII] 1907,1909 emission from a strong Lyman continuum emitting galaxy
• Dependence of the IRX-$\beta$ dust attenuation relation on metallicity and environment
• Quantifying the suppression of the (un)-obscured star formation in galaxy cluster cores at 0.2$\lesssim$$z$$\lesssim$0.9
• Predicting Lyman-alpha escape fractions with a simple observable: Lyman-alpha in emission as an empirically calibrated star formation rate indicator
• Galaxy inclination and the IRX-beta relation: Effects on UV star-formation rate measurements at intermediate to high redshifts
• Comparison of cosmological simulations and deep submillimetre galaxy surveys
• Revisiting Attenuation Curves: the Case of NGC 3351
• Quenching by gas compression and consumption: A case study of a massive radio galaxy at z = 2.57
• Geometry effects on dust attenuation curves with different grain sources at high redshift
• Simulations Find Our Accounting of Dust-Obscured Star Formation May Be Incomplete
• Dark-ages Reionization and Galaxy Formation Simulation -- XIX: Predictions of infrared excess and cosmic star formation rate density from UV observations
• G.A.S. II: Dust extinction in galaxies; Luminosity functions and InfraRed eXcess
• TODDLERS: A new UV-mm emission library for star-forming regions. 1. Integration with SKIRT and public release
• JWST PRIMER: A lack of outshining in four normal z =4-6 galaxies from the ALMA-CRISTAL Survey
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• The ALMA-CRISTAL survey: Dust temperature and physical conditions of the interstellar medium in a typical galaxy at z=5.66
• A Variant Stellar-to-nebular Dust Attenuation Ratio on Subgalactic and Galactic Scales
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