Ziri Younsi

Leverhulme Trust Early Career Fellow

Mullard Space Science Laboratory, University College London, UK

Hello and welcome to my webpage!

I am a high-energy theoretical astrophysicist working in the Astrophysics group at University College London (MSSL), UK, as a Leverhulme Trust Early Career Fellow. My research interests are principally in high-energy astrophysics and most recently I am 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 (micro-)physics therein. Further details of my research interests may be found under RESEARCH.

I also 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 supermassive black holes (SMBHs) located at both the centre of our Milky Way Galaxy, which we call Sagittarius A* (or Sgr A*), as well as the SMBH located in Messier 87 (M87), are prime candidates 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* and M87. The BlackHoleCam project works very closely with the EHT and both are now working together within the EHT collaboration (EHTC). The major goal of the EHTC is to directly image the “shadow” (as predicted by General Relativity) to be cast by such SMBHs. In addition to the target black hole shadow, M87 also possesses a large-scale relativistic 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.