‘‘Relativistic Jets from Supermassive Black Holes’’ is the title of the talk to be presented by Professor of Physics Daniel C. Homan of Denison University.
Abstract: Quasars, and their extreme variety "Blazars", are the brightest examples of Active Galactic Nuclei (AGN) which are powered by supermassive black holes that are voraciously feeding on material flowing into the center of the galaxy. In addition to their tremendous output of light across the electromagnetic spectrum, some AGN also have collimated outflows of highly energetic plasma which stream away from the center of the galaxy at apparent speeds greater than the speed of light.
In their most spectacular form, these relativistic jets can extend for hundreds of thousands of light-years, well outside the host galaxy, to inflate giant radio lobes. I study these jets very near their origin to understand their structure and how they are accelerated and collimated. This work involves disentangling the effects of relativistic motion near our line of sight to uncover the underlying properties of the jet itself.
A reception for Professor Homan begins at 4:10 p.m. in the Anderson Lounge, Wright Lab, second floor.