Astrophysique à Haute Energie

Supermassive black holes (SMBHs) located at the center of galaxies and stellar-mass black holes in X-ray bright binary systems (XRBs), exhibit highly variable and often transient X-ray and gamma-ray emissions. Additionally, Tidal Disruption Events (TDEs) —which occur when a star approaches a massive black hole and is tidally disrupted— radiate mostly in the UV and soft X-rays.
 

The High Energy Stereoscopic System (H.E.S.S.) detects gamma-rays in the TeV (Tera-electron Volt ≡ 10^12 eV) energy range, and has contributed significantly to our understanding of the high energy universe. A complete survey of the galaxy at the TeV energies was carried out by H.E.S.S., known as the H.E.S.S. Galactic Plane Survey (HGPS). The HGPS recorded nearly one hundred objects with various source types identified, including shell-type supernova remnants, pulsar powered nebulae (PWNe), compact X-ray binary systems, etc.

The origin of very- and ultra-high-energy cosmic rays remains one fundamental question in astroparticle physics. High-energy neutrinos would provide a distinct signature for acceleration processes in galactic and extragalactic sources.

Blazars are among the most energetic and luminous sources in the Universe.

Les systèmes binaires X sont constitués d’un objet compact, étoile à neutrons ou trou noir, en interaction avec une étoile compagnon. Sous l’effet du fort potentiel gravitationnel de l’objet compact, une partie de la matière de l’étoile compagnon est accrétée par l’objet compact. Cette matière forme un disque d’accrétion qui, en se réchauffant par friction, émet un rayonnement intense dans le domaine des rayons X. 

Master-Level Internship (Spring 2026, with potential progression to a PhD)