Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work. Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES. Jacopo ChevallardPostdoctoral Research Assistant Sub departmentAstrophysics jacopo.chevallard@physics.ox.ac.uk Telephone: 01865 273467 Denys Wilkinson Building, room 463 About Publications