Baptiste Le Nagat Neher

Baptiste Le Nagat Neher

Titre : Particles acceleration in relativistic winds and jets of active galactic nuclei
Equipe : ASTRE
Encadrant : Pierre Cristofari, Andreas Zech

The question of the origin of cosmic rays,charged particles reaching extreme energies,remains one of the challenges of modern astrophysics.
One of the leading mechanism to explain their acceleration is first-order Fermi acceleration, or diffusive shock acceleration, ubiquitous in many astrophysical environments.
This PhD project focuses on Ultra Fast Outflows (UFOs), mildly relativistic winds produced around active galactic nuclei (AGN). Recently revealed through X-ray spectroscopy, these winds are promising candidates for multi-messenger sources (high-energy photons, neutrinos, cosmic rays).
I am developing semi-analytical models describing particle acceleration and the associated emissions to predict observable signatures and identify the most promising candidates for next-generation instruments.
This work is also part of the scientific preparation for future major facilities, particularly the Cherenkov Telescope Array Observatory (CTAO), which will play a key role in understanding acceleration processes.