Dr. Iair Arcavi (Senior Lecturer) works on extragalactic observational astrophysics, specifically astronomical transients, including understanding the diversity of core-collapse supernovae and connecting them to their massive star progenitors, mapping the observational properties of tidal disruption events and using them to study accretion physics and the population of supermassive black holes, and electromagnetic followup of gravitational wave events to find the optical flares (known as macronovae or kilonovae) produced by neutron star mergers and using them to constrain the physics of neutron stars, their mergers, and their roles in creating the heavy elements.