Department of Astronomy & Joint Space-Science Institute
University of Maryland, College Park
He is primarily interested in the physics of active galactic nuclei and starburst galaxies, particularly the connection between the supermassive black hole, the starburst, and the host galaxy, and the importance of feedback on galaxy evolution and the intracluster medium. He uses astronomical facilities that cover the entire electromagnetic spectrum from the X-rays (e.g., Chandra and XMM-Newton), UV-optical (e.g., HST, ground-based telescopes), infrared (e.g., Spitzer, Herschel, and soon JWST), and radio (e.g., VLA, ALMA). He is also the lead on a number of instrumentation projects for large ground-based optical and infrared telescopes, including recent efforts to use novel astrophotonic techniques to improve and miniaturize astronomical filters, spectrometers, and nulling interferometers for astrophysics and space science.