Events Galaxy evolution since cosmic noon: lessons from gas, dust and star formation

Time: Thursday, September 20, 2018 14:00
Location: S727, Mong Man-wei Science & Technology Building

Speaker: Dr. Stijn Wuyts, University of Bath, UK

Integral-field spectroscopic surveys such as MaNGA in the nearby Universe and KMOS3D out to z~2.6 are providing us with a 3D mapping of the ionized gas emission in large samples of mass-selected star-forming galaxies. Their dynamics reveal the depth of gravitational potentials in which the gas orbits. Broad components to the line emission shed light on galactic-scale outflows driven by star formation and active nuclei. Moreover, the spatial distribution of ionized gas emission serves as a tracer of where within galaxies the (unobscured) star formation is taking place. Complementing these rest-optical observations are far-infrared measures of dust and CO line emission, probing the cold gas reservoirs, molecular outflows and the distribution of dust-obscured star formation. I will present recent findings on the nature and evolution of star-forming galaxies from cosmic noon to the present day, obtained by combining multi-wavelength tracers of dust and star formation, ionised and molecular gas.

Dr. Stijn Wuyts is a Senior Lecturer in extragalactic astronomy at the University of Bath. He obtained his PhD from Leiden University on the topic of "Red Galaxies at High Redshift", worked on the interface between galaxy observations and simulations as W. M. Keck Fellow at the Harvard-Smithsonian Center for Astrophysics, and further explored the distant universe as Junior Scientist at the Max Planck Institute for Extraterrestrial Physics. At the University of Bath, he combines tracers of stars, dust, ionised and cold gas to reveal the physics governing the build-up of stars within galaxies near and far, and the evolution of their structure through cosmic time.