from the distant Universe
Quasars and Radio Galaxies
Studies of the plasma ejected by radio galaxies and quasars, radiant at both radio and X-ray wavelengths give insights into the energetics and evolution of these extreme objects.
from the energetic Universe
Cosmic rays
The origin of ultra-high energy cosmic rays (UHECRs) has long been unknown. Investigations with James Matthews, Tony Bell and Anabella Araudo led us to conclude that UHECR anisotropies can be attributed to giant-lobed radio galaxies such as Centaurus A and Fornax A. We have explored contexts where the acceleration takes place.
from our Galaxy
Massive stars & microquasars
Microquasars and massive stars in our Galaxy can evolve on human-friendly timescales. Time-lapse spectroscopy techniques from the Global Jet Watch elucidates the underlying physics in some of these rich and dynamic systems.