Cosmology Seminar: Harley Katz

Harley Katz is a PhD student at the Institute of Astronomy, University of Cambridge

Galaxy Formation at z>6 and the Sources Which Drive Reionization

Various observational probes are beginning to penetrate deep into the reionization epoch providing unprecedented insight into galaxy formation during the first billion years.  However, much remains unknown about the sources, timing, and physics of reionization and these deep observations have identified various anomalies in the high-redshift galaxy population.  We present a suite of high-resolution cosmological radiation hydrodynamics simulations that employ three new radiation hydrodynamics algorithms designed to address some of the most pressing questions about reionization.  We explicitly measure the contribution of different classes of sources to the volumetric ionization fraction and meta-galactic UV background, both globally and spatially, and demonstrate how the small scale physics in the IGM relate to the topology and properties of HII bubbles.  We discuss various implications for ALMA, JWST, and SKA.


Bridget Falck
Published Sep. 4, 2017 11:37 PM - Last modified Oct. 24, 2017 10:01 AM