Associate Professor, University of Minnesota School of Physics and Astronomy
Ph.D., Physics, University of California, Los Angeles, 1991
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My research interests are in experimental high-energy astrophysics. As a member of the VERITAS (Very Energetic Radiation Imaging Telescope Array System), I study gamma rays detected from active galactic nuclei. Gamma-ray astronomy probes the extreme physics of systems such as the black holes at the centers of active galaxies. These systems emit radiation throughout the electromagnetic spectrum and I work to combine the information obtained from telescopes operating at multiple wavelengths to decipher how the active galaxy powers the emission of gamma rays. I am also working on the next generation ground-based gamma ray array, AGIS (Advanced Gamma-ray Imaging System) comprising ~50 telescopes in an array with the aim of greatly improving the angular resolution and sensitivity to high energy gamma ray emission.
Galaxy Zoo and Zooniverse Citizen Science Projects
I am also a member of the Zooniverse collaboration which is a collection of online research projects that require human pattern matching abilities to sort through the millions of images and other data products being generated by telescopes, ocean sensors, satellites and digitized texts. I work particularly with Galaxy Zoo data where over 250,000 members of the general public have provided a highly accurate classification of a million galaxies from the Sloan Digital Sky Survey. I am currently studying a sample of barred galaxies derived from Galaxy Zoo to study the relationship between active galactic nuclei and galactic bars.
Ongoing Scientific Projects:
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