Affiliation: Faculty of Mathematics and Physics, Univ. of Ljubljana

Contribution: Oral

Title: Evolution of dust attenuation in high-redshift galaxies observed by JWST

Abstract: The dust attenuation curve, crucial for understanding galaxy properties such as stellar mass and star formation rate, is well-characterized locally but remains unexplored in early cosmic epochs. I will present new results on characterizing dust attenuation curves and physical properties of galaxies at z ~ 2-12, obtained by fitting the JWST spectroscopic data with a customized SED fitting code.
Our results reveal deviations from local attenuation curves and evolutionary trends with redshift, suggesting different dust production mechanisms in the early Universe. We also detect UV bump features in numerous early galaxies, including the most distant one at z = 7.55. These findings offer new insights into dust grain size, composition, and cosmic dust evolution in high-redshift galaxies. This work enhances our understanding of galaxy formation and evolution, addressing key topics such as high-redshift star-forming galaxies, and the role of dust in early cosmic epochs, showcasing the transformative potential of JWST.

This contribution can be found here (pdf).