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Physics Colloquium: (Reverberation) Mapping the Universe 1 or 1000 Quasars at a Time
Start Date: 2/19/2015Start Time: 3:30 PM
End Date: 2/19/2015End Time: 4:30 PM

Event Description
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:
Name: Prof Gordon Richards
Email: gtr@physics.drexel.edu
Location:
Disque Hall 919, S. 32nd Street and Chestnut Street, Philadelphia, PA 19104
Audience:
  • Undergraduate Students
  • Graduate Students
  • Faculty
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