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 supermassive black holes (SMBHs), with primary targets 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), at sub-mm wavelengths.

I am also a member of several working groups within the Event Horizon Telescope Collaboration (EHTC), a global VLBI array of radio telescopes, which is the tool being used to image the black hole "shadow" anticipated to be detectable from SMBHs. The major goal of the EHTC is to directly image the shadow (as predicted by General Relativity) cast by such SMBHs. In addition to the target black hole shadow in Sgr A*, M87 also possesses a large-scale relativistic jet (more than 1.5 kpc in extent) and it is hoped that the EHTC can help to elucidate the jet launching site, mechanism and underlying physical processes.

I have recently become a full member of the LISA Consortium, which will be the successor to LIGO and Virgo: a space-based interferometric triangle of detectors capable of detecting hitherto inaccessible regions of the GW frequency domain, such as ultra-compact binaries, SMBH) binaries, and extreme mass ratio inspirals (EMRIs).