Understanding the Universal Dust Attenuation Scaling Relation of Star-Forming Galaxies

Abstract

Star-forming galaxies (SFGs) adhere to a surprisingly tight scaling relation of dust attenuation parameterized by the infrared excess (IRX=$L_{\mathrm{IR}}/L_{\mathrm{UV}}$), being jointly determined by the star formation rate (SFR), galaxy size ($R_{\mathrm{e}}$), metallicity ($Z$/Z${}_{\odot }$) and axial ratio ($b/a$). We examine how these galaxy parameters determine the effective dust attenuation and give rise to the universal IRX relation, utilizing a simple two-component star-dust geometry model in which dust in the dense and diffuse interstellar medium (ISM) follows exponential mass density profiles, connected with but not necessarily identical to the stellar mass profiles. Meanwhile, empirical relations are adopted to link galaxy properties, including the gas--star formation relation, the dust-to-stellar size relation, as well as the dust-to-gas ratio versus metallicity relation. By fitting a large sample of local SFGs with the model, we obtain the best-fitting model parameters as a function of metallicity, showing that the two-component geometry model is able to successfully reproduce the dependence of IRX on SFR, $R_{\mathrm{e}}$, $b/a$ at given $Z$/Z${}_{\odot }$, as well as the dependence of power-law indices on metallicity. Moreover, we also retrieve constraints on the model geometry parameters, including the optical depth of birth clouds (BCs), BC-to-total dust mass fraction, BC covering factor of UV-emitting stars, and star-to-total dust disc radius ratio, which all evolve with galaxy metallicity. Finally, a consistent picture of how the star-dust geometry in SFGs evolves with galaxy metallicity is discussed.

20 pages, 10 figures, published in MNRAS (2024, Volume 528, Issue 1, pp.658-675); A PHTHON package IRX_TAU_TOT is available at https://github.com/LvZF/irx_tau_tot/ to calculate the total dust optical depth of a galaxy with given metallicity and best-fitting geometry parameters

References in corpus (52)

• 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 $z=3$
• Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
• The Mass-Metallicity Relation at z~2
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• The Main Sequence of star-forming galaxies across cosmic times
• Fast and inefficient star formation due to short-lived molecular clouds and rapid feedback
• Dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0<z<4
• The Constant Average Relationship between Dust-obscured Star Formation and Stellar Mass from $z=0$ to $z=2.5$
• Dynamics of Dusty Radiation Pressure Driven Shells and Clouds: Fast Outflows from Galaxies, Star Clusters, Massive Stars, and AGN
• Geometry of Star-Forming Galaxies from SDSS, 3D-HST and CANDELS
• Giant Molecular Cloud Catalogues for PHANGS-ALMA: Methods and Initial Results
• Half-mass radii for ~7,000 galaxies at 1.0 < z < 2.5: most of the evolution in the mass-size relation is due to color gradients
• DustPedia - A Definitive Study of Cosmic Dust in the Local Universe
• A New Census of the 0.2< z <3.0 Universe, Part II: The Star-Forming Sequence
• Radial distribution of dust, stars, gas, and star-formation rate in DustPedia face-on galaxies
• Galaxy Simulation with Dust Formation and Destruction
• Revisiting the Integrated Star Formation Law. II. Starbursts and the Combined Global Schmidt Law
• The equilibrium view on dust and metals in galaxies: Galactic outflows drive low dust-to-metal ratios in dwarf galaxies
• The MOSDEF Survey: the Variation of the Dust Attenuation Curve with Metallicity
• Stellar Absorption Line Analysis of Local Star-Forming Galaxies: The Relation Between Stellar Mass, Metallicity, Dust Attenuation and Star Formation Rate
• Old and young stellar populations in DustPedia galaxies and their role in dust heating
• Dust origin in late-type dwarf galaxies: ISM growth vs. type II supernovae
• Extending the evolution of the stellar mass-size relation at $z\le 2$ to low stellar mass galaxies from HFF and CANDELS
• Galactocentric variation of the gas-to-dust ratio and its relation with metallicity
• Structural evolution in massive galaxies at z~2
• Ultraviolet through Infrared Spectral Energy Distributions from 1000 SDSS Galaxies: Dust Attenuation
• Morphologies of Galaxies at $z\gtrsim 9$ Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at $z\sim 12$
• A large catalogue of molecular clouds with accurate distances within 4 kpc of the Galactic disk
• Major mergers are not significant drivers of star formation or morphological transformation around the epoch of peak cosmic star formation
• The Mass-Size Relation and the Constancy of GMC Surface Densities in the Milky Way
• The KMOS${}^{3D}$ Survey: Investigating the Origin of the Elevated Electron Densities in Star-Forming Galaxies at $1\lesssim z\lesssim 3$
• The MOSDEF Survey: Implications of the Lack of Evolution in the Dust Attenuation-Mass Relation to z~2
• The high redshift SFR-M* relation is sensitive to the employed star formation rate and stellar mass indicators: Towards addressing the tension between observations and simulations
• JWST CEERS probes the role of stellar mass and morphology in obscuring galaxies
• Far-reaching Dust Distribution in Galaxy Disks
• CO Emission, Molecular Gas, and Metallicity in Main-Sequence Star-Forming Galaxies at $z\sim 2.3$
• Radiation pressure on dust explains the Low Ionized Broad Emission Lines in Active Galactic Nuclei
• Nonparametric galaxy morphology from UV to submm wavelengths
• Systematic biases in determining dust attenuation curves through galaxy SED fitting
• An Updated Dust-to-Star Geometry: Dust Attenuation Does Not Depend on Inclination in $1.3\le z\le 2.6$ Star-Forming Galaxies from MOSDEF
• JADES: Insights on the low-mass end of the mass--metallicity--star-formation rate relation at $3<z<10$ from deep JWST/NIRSpec spectroscopy
• Star-formation rate and stellar mass calibrations based on infrared photometry and their dependence on stellar population age and extinction
• Interpreting the star formation - extinction relation with MaNGA
• Dust attenuation, dust content and geometry of star-forming galaxies
• The distribution of dust in edge-on galaxies: I. The global structure
• A Universal Relation of Dust Obscuration Across Cosmic Time
• Probing star formation and ISM properties using galaxy disk inclination III: Evolution in dust opacity and clumpiness between redshift 0.0 < z < 0.7 constrained from UV to NIR
• The Chocolate Chip Cookie Model: dust-to-metal ratio of HII regions

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• SEW: A full-spectrum linear fitting with stellar population synthesis method Based on "Equivalent Widths spectrum"
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