Ziri Younsi

Alexander von Humboldt Fellow

Institute for Theoretical Physics, Goethe University, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany

Hello and welcome to my webpage!

I am an astrophysicist from the UK, now working in the Relativistic Astrophysics group at the Goethe University of Frankfurt in Germany as an Alexander von Humboldt Fellow. My research interests are principally in high-energy astrophysics and in recent years I have been particularly interested in the physics of black holes. In order to build a dynamical picture of the environment surrounding black holes I combine the mathematics of General Relativity with General-Relativistic Radiation Transport (GRRT) calculations and GR Magnetohydrodynamics (GRMHD) simulations. Using these calculations I calculate the electromagnetic emissions from accreting black hole environments to construct a time-dependent picture and understanding of the physics therein. Further details of my research interests may be found under RESEARCH.

I work within the European Research Council (ERC) synergy grant-funded “BlackHoleCam” project, whose principle aim is to image, measure and observe astrophysical black holes. In particular, the black hole located at the centre of our Milky Way Galaxy, which we call Sagittarius A* (or Sgr A*), is a prime candidate for radio astronomers to observe and image using sub-millimetre very-long-baseline interferometry (VLBI).  The Event Horizon Telescope (EHT), a global VLBI array of radio telescopes, is the tool which will be used to image Sgr A*. The BlackHoleCam project works very closely with the EHT and both are now working together within the EHT collaboration (EHTC). The first of these observations will be performed by the EHT later this year. The major goal of the EHTC is to directly image the “shadow” cast by the supermassive black holes that are anticipated to reside both in our Galactic Centre and at the centre of the galaxy Messier 87 (M87). In addition to the target black hole shadow, M87 also possesses a large-scale jet (more than 1.5 kpc in extent) and it is hoped that the EHT can help to elucidate the jet launching site, mechanism and underlying physical processes.