Kayhan Gultekin, University of Michigan
Abstract: NANOGrav has found evidence for the gravitational wave background from our pulsar timing array data. This Earth-moving new work is the result of fifteen years of work with contributions from over a hundred scientists and is consistent with other pulsar timing arrays. I will present our recent results and why we are confident in our results. I will spend most of my time discussing the interpretation of the background as due to a cosmic population of supermassive black hole binaries. I will present how our pulsar timing array data put constraints on the population and how we can improve these constraints with optical, infrared, and X-ray observations of galaxies and binary AGN.
Virtual - Zoom: https://arizona.zoom.us/j/4470189357