Affiliation: University of Edinburgh

Contribution: Oral

Title: Mapping the multi-wavelength structures of SMGs with JWST

Abstract: Bright sub-millimeter-selected galaxies (SMGs) represent some of the most extreme objects in the Universe, forming substantial stellar mass (M^* ~ 10¹¹ M_solar) on sub-Gyr timescales. Prior to JWST, mapping the multi-wavelength emission of dusty star-forming galaxies was challenging, and observations of compact dust continuum sizes were in contrast to the extended, clumpy structures traced by HST imaging. With JWST, we can now trace the assembly of stellar mass on sub-kpc scales within these massive galaxies at high redshift. In this talk, I will present a detailed study of the multi-wavelength structures of a homogeneous sample of ~70 SMGs from the AS2UDS sample with deep JWST NIRCAM/MIRI imaging at 9000A-18𝜇m from the PRIMER survey. Most sources are well-resolved, many with clear disk-like structures, visible bars, and a handful undergoing major mergers. I will make comparisons to forward-modelled simulations of high-redshift galaxies (using the highly-resolved FIRE simulations plus radiative transfer), and discuss how the multi-wavelength observations can put constraints on theoretical models.

This contribution can be found here (pdf).