I am the theory lead of the Swift consortium, a multi-institution NASA satellite to study GRB afterglows in the gamma-, X-ray and optical ranges, launched in 2004. I am director of the Center for Particle and Gravitational Astrophysics, and a member of the Institute for Gravitation and the Cosmos. I was a long-time member of the ICECUBE international collaboration, an under-ice Cherenkov detector located in Antartica for the measurement of ultra-high energy neutrinos, and I am an affiliated scientist of the Fermi Gamma-ray Space Telescope, as well as one of the founding members of the AMON (Astrophysical Multi-Merssenger Observatory) consortium. A brief overview of the main research areas and some details on specific projects are under the previous links for gamma-ray bursts, neutrinos , gravitational waves, neutron stars, and cosmology.
Other research topics have included the first studies of dissipative spherical accretion on black holes; the first investigation of galaxy formation mediated by primeval black holes or cold dark matter, and the freezing of cold dark matter in the cosmological radiation, called the Meszaros effect in some cosmology texts; the physics of strongly magnetized plasmas, including the QED vacuum polarization effects; models of accreting X-ray pulsars and cyclotron lines, summarized in a book on high-energy radiation from neutron stars; topics in the hydrodynamics and ionization of the interstellar medium; and the cosmological diffuse X-ray background radiation.
More detailed references are in a list of publications and a list of recent talks.
Research sponsors: NSF, NASA