13.12.2024
Congratulations to Julien Dörner who has been awarded the SFB1491 Paper of the Year 2024 Award for his crucial contribution to the understanding of cosmic-ray propagation in the Galactic Center region!
The Galactic Center is one of the most fascinating yet complex areas in our Galaxy.
For the first time, Julien combined a 3D model of both the magnetic field configuration and the gas distribution with state-of-the-art cosmic-ray propagation modeling. He tested different anisotropic diffusion and cosmic-ray population models and compared their predictions to very-high-energy gamma-ray data. His model lays the foundation for future observations of the Galactic Center with the upcoming CTAO.
This research was published under the title "Impact of Anisotropic Cosmic-Ray Transport on the Gamma-Ray Signatures in the
Galactic Center” in the Astrophysical Journal, with Julien as the lead author.
09.12.2024
We are happy to announce that Dr. Felix Riehn (TU Dortmund, AG Albrecht ) has joined our CRC as a new PI!
Felix studies interactions of particles at the highest energies. He mostly focuses on building theoretical models and studying extensive air showers at the Pierre Auger Observatory.
Extensive air showers are formed when ultra-high energy cosmic rays that originate somewhere outside the solar system, interact with the nuclei in the Earth's atmosphere. As it turns out, none of the models we have for particle interactions are able to describe accurately what we observe in extensive air showers. This is part of the reason why we do not know exactly where the cosmic rays were originally accelerated.
In his research within the CRC, he wants to combine cosmic ray data on particle interactions from the Auger observatory with the observations of accelerator experiments at CERN's Large Hadron Collider to improve our understanding of particle interactions.
06.12.2024
Our speaker Julia Tjus was recently interviewed for the magazine “Aufruhr” by the Mercator Foundation.
She had the opportunity to talk about her research, with a particular focus on cosmic rays. Furthermore, she had the chance to share insights about her scientific career and provided helpful tips for young scientists.
The full interview (in German) can be found here.
07.11.2024
SFB1491 was a partner once again for the Student Project Week at the Faculty of Physics and Astronomy of RUB in October 2024!
By that, we are contributing to the effort of inspiring and engaging young people with the fascinating world of physics through hands-on experiences.
The kids experienced an exciting week investigating a broad range of physical effects, from gold coating with plasmas and uncovering the true colors of stars, to learning how ultrasound and X-rays help us see inside the human body.
More information on the program can be found here.
28.10.2024
Our scientist Rainer Grauer was involved in the development of a new approach to describe turbulence mathematically, together with his student Sumeja Bureković and long-term collaborator Tobias Schäfer (City University of New York).
In particular, irregular fluctuations, so-called intermittency, which cannot be described with a normal Gaussian distribution, are addressed.
They developed an approach using instantons - represent the probabilities of turbulence as a spatio-temporal path integral. This method allows for the first time to describe and calculate isolated and localized fluctuations, which is a major step in solving one of the big open questions in classical physics.
The full publication can be found here:
S. Bureković, T. Schäfer, R. Grauer
„Instantons, Fluctuations, and Singularities in the Supercritical Stochastic Nonlinear Schrödinger Equation“
See also the news article on our faculty’s webpage
here
Image:
Instantones with smaller and larger localized fluctuation.
