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Bronwyn Reichardt Chu

Galaxy outflows are thought to be caused by winds coming off massive young stars and the explosions of supernovae in star-forming regions of galaxies. They push material outward, regulating the rate of star formation, and also enriching the rest of the galaxy. If the outflow has enough energy, it can escape the galaxy altogether and enrich the surrounding circumgalactic medium. However, the physical parameters affecting the mass and velocity of outflows are not yet fully understood. In my PhD, I'll be measuring outflows and comparing their properties (things like outgoing velocity, velocity dispersion and mass) with galaxy properties (such as local star formation rate, star formation surface density, stellar mass surface density, metallicity, etc.). We can now do this in a more spatially resolved way, using data from KCWI, a spectrograph on Keck II. The ability to trace outflows to specific points within galaxies opens up exciting new channels to investigate and understand in greater detail the causes behind outflows and their effects on the surrounding environment.

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