Seminari
Thursday 29/04/2021 @ 15:00, JAC - Online - https://meet.google.com/mnz-axnp-swb
Irene Shivaei (Steward Observatory, University of Arizona), "Distant Dusty Universe"
Dust is one of the most mysterious components of galaxies. Although by mass it only represents ~1% of the interstellar medium, it has important roles in the physics and chemistry of the interstellar medium and hides a significant fraction of cosmic star formation across redshifts. Despite its importance, we do not know much about the properties of dust at high redshifts. In this talk, I will highlight our recent results using data from Keck and ALMA to set constraints on the dust attenuation curve and far-IR dust emission of galaxies at redshifts of z~1.5-2.5, the peak of cosmic star formation activity. The novelty of these studies is access to optical nebular emission lines that enable us to tie the stellar ionizing emission and ionized gas properties to those of dust grains. I will end the talk with a brief overview of the US JWST/MIRI GTO HUDF survey to probe star formation and AGN activity at z~1-3 using MIRI, NIRCam, and NIRSpec. The imminent launch of JWST will revolutionize our knowledge about the dust-obscured star formation in high-redshift galaxies, given the significantly higher sensitivity and resolution of MIRI compared to those of its predecessors.