Remind me about this event. Notify me if this event changes. Add this event to my personal calendar.


Disque Hall 919, S. 32nd Street and Chestnut Street, Philadelphia, PA 19104


  • Undergraduate Students
  • Graduate Students
  • Faculty

Physics Colloquium: (Reverberation) Mapping the Universe 1 or 1000 Quasars at a Time

Thursday, February 19, 2015

3:30 PM-4:30 PM

Kelly Denney, PhD, Ohio State University


Reverberation mapping is a method that uses the time domain to probe size scales deep within the gravitational potential of the accreting supermassive black hole in the center of an active galactic nucleus (AGN), or quasar. By studying the time variability characteristics of what are effectively light echoes arising from various emission regions near the black hole, we can probe the geometry, kinematics, and physics of material on scales that are spatially unresolvable with even the largest telescopes.  I will discuss how this method works, some basic physical properties of the systems that we are able to obtain, and the broader applications of these measurements.  I'll also present some of the newest observational campaigns/experiments recently finished or still underway that are using a multi-directional approach to expand and extend the current state of the field.

Contact Information

Prof Gordon Richards