Article ISI
The Open Journal of Astrophysics  (2026)

Dust in the Average Galaxy: Attenuation, Emission, and Opacity from 0

Casey, Caitlin M.; Akins, Hollis B.; Battisti, Andrew J.; McKinney, Jed; Treister, Ezequiel; Zavala, Jorge A.; Algera, Hiddo; Aravena, Manuel; Cheng, Yingjie; Drakos, Nicole E.; Faisst, Andreas L.; Franco, Maximilien; Fujimoto, Seiji; Gozaliasl, Ghassem; Hadi, Ali; et. al.

Abstract

We present constraints on the dust emission and attenuation properties of galaxies across 0 10 10.5 M ⊙ . We derive empirical relationships for the effective attenuation, dust temperature, fraction of star formation that is unobscured, and dust-to-stellar mass ratio as functions of redshift and stellar mass. We separate the first order effect of stardust geometry from dust grain properties by combining constraints on the IR SED, UV SED, and dust mass surface density. Importantly, we measure over an order of magnitude decrease in κ U V κ F I R –the ratio of dust mass absorption coefficients in the UV at 1600Å and FIR at 500 μ m–from z~0 to z~7. A depressed κ U V κ F I R is consistent with a deficit of small dust grains, possibly attributable to the intense radiation fields of high- z star formation; indeed, we find a redshift-invariant inverse relationship between κ U V κ F I R and Σ S F R . Most evolution in the dust-to-stellar ratio is at z < 1 , the product of mild downward evolution in the dust-to-gas ratio combined with steep evolution in the gas-to-stellar ratio. The significant evolution and dynamic range of κ U V κ F I R and prevailing disconnect between the UVoptical and FIR regimes emphasize that direct dust constraints are irreplaceable for the majority of star-forming galaxies at z < 7 , not just the most extreme star-formers.

Más información

Título según WOS:	ID RC:173165269_S24 Not found in local WOS DB
Título de la Revista:	The Open Journal of Astrophysics
Volumen:	9
Editorial:	Maynooth University
Fecha de publicación:	2026
DOI:	10.33232/001c.167549
Notas:	ISI