When Opposites Collide: spatially-resolving sub-kpc physics in high-z galaxies with lensing & JWST

I will present spatially-resolved studies of the Waz Arc, an incredibly bright, massive (zAB mag 20.5), a gravitationally-lensed galaxy located at the tail end of the reionization era (z=5). This highly magnified (70x) galaxy allows a window into the inner workings and spatial locations of a diversity of stellar populations within clumpy regions situated in a (remarkably) metal-rich ISM down to sub-kpc scales – these scales are simply impossible to achieve without lensing and JWST. While globally, we identify this system as a post-starburst galaxy, strong lensing and JWST IFU spectroscopy enable measurement of the spatial extent and variation of key physical properties. We find a large dynamic range in nebular ionization conditions and gas-phase metallicities that are broadly not as metal-poor as other galaxies found at these epochs. Tying these spatially-varying physical properties with local star formation histories can help us uncover how the Waz Arc assembled over cosmic time. This distant galaxy is but one of many such highly-lensed, high-redshift systems along the early edge of cosmic star formation, filled with clumpy structures covering a wide variety of stellar and nebular properties. I will close by placing the properties of clumpy structures in the Waz Arc in context with the rest of a sample of several magnified and incredibly clumpy high-redshift systems from the JWST LEGGOS and TEMPLATES surveys, totaling to ~100hrs of JWST imaging and IFU spectroscopy.