Millisecond imaging searches for radio transients --- Neutron stars and other objects with strong magnetic fields emit brief, intense pulses of radio light. These pulses can be both intrinsically interesting (e.g., in the study of stellar magnetosphers and the search for exoplanets) and effective as probes of the interstellar and intergalactic media. I am developing the concept of "fast imaging" to search for such pulses using radio interferometers like the Very Large Array and LOFAR.
How is the magnetic field organized in a galaxy? --- The propagation of polarized light encodes information about the magnetized plasma along its path. The recent development of algorithms to study wide-bandwidth, multi-channel spectra has given us new access to this information. I am interested in using this technique to study magnetic fields in galaxies throughout the universe.
Is the Galactic Center host to a massive outflow? --- The Galactic center is the most active and complex region in the Milky Way. A focus of my work is on a shell-like structure that rises about 150 parsecs above the Galactic plane, spanning the central parsecs, known as the Galactic center lobe. I have used multiwavelength observations to show that it is a minor outflow powered by stellar winds and supernovae in our Galactic nucleus.