Lena C. Debbrecht

High-Resolution Studies of Active Galactic Nuclei using mm-VLBI
 

Advisors: Eduardo Ros, Georgios F. Paraschos, J. Anton Zensus

Collaborators: Georgios F. Paraschos, Eduardo Ros, Ioannis Liodakis, Iván Agudo, J. Anton Zensus
PhD Defense Date: exp. 2027 (Uni Cologne)

Project Summary: 

Within my PhD research, I focus on active galactic nuclei (AGN) jets, which are powerful, collimated outflows launched from the central regions of galaxies hosting supermassive black holes. I investigate the physical mechanisms responsible for launching, accelerating, and collimating these relativistic jets, with particular emphasis on the role of magnetic fields, the ambient medium, and high-energy emission, particularly γ-rays.
Understanding how AGN jets form and evolve is essential for explaining how supermassive black holes interact with their host galaxies and influence their large-scale environments. My work further explores the connection between γ-ray activity and jet morphology, aiming to better understand how high-energy variability is linked to structural changes and physical processes within relativistic jets. 

Publications
L. C. Debbrecht, G. F. Paraschos, E. Ros, T. P. Krichbaum, U. Bach, M. A. Gurwell, J. A. Hodgson, M. Janssen, J.-Y. Kim, M. M. Lisakov, N. R. MacDonald, D. G. Nair, J. Oh, J. A. Zensus
Spectral index evolution of the limb-brightened jet in 3C 84
  A&A, 709, A192 (2026)
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