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2/15/18: SO/NOAO Joint Colloquium Series: Sally Oey, Univ. of Michigan


Title: Toward Understanding Feedback from Local Lyman Continuum-Emitting Galaxies

The fate of Lyman continuum (Lyc) radiation from massive stars is a problem of fundamental importance to both galaxy evolution and cosmic evolution. What conditions and feedback processes allow these ionizing photons to escape their host galaxies? Only small samples of local Lyc emitters are currently known, including a few nearby starburst galaxies and extreme Green Pea galaxies. They generally appear to be very young, intense, and compact starbursts triggered by galaxy mergers, and forming super star clusters. I will present what we are starting to learn about the mechanical and radiative feedback in these systems, their ionizing sources, and a possible new paradigm for the extreme feedback regime.