Speaker: Marcin Semczuk (University of Barcelona)

Title: Non-Equilibrium Galactic Disc Dynamics in TNG50

Abstract: The Milky Way is a dynamic system, exhibiting a wealth of complex processes revealed through the unprecedented precision of ESA's Gaia mission. Gaia's stellar data provide a detailed window into the ongoing dynamical evolution of our Galaxy. For instance, the Galactic bar appears to be slowing down in its angular rotation, while the outer disc shows perturbations likely caused by the passage of the Sagittarius dwarf galaxy. These findings drive theoretical work aimed at uncovering the underlying physics and improving our understanding of the Milky Way's structure and evolution. Until the past 10-15 years, such processes were studied primarily using near-equilibrium models. The emergence of high-resolution cosmological simulations now enables us to explore them in fully non-equilibrium settings and in a more statistical manner. In this talk, I will present my recent results from the TNG50 run, focusing in particular on bar slowdown and satellite-induced perturbations.

Note: Marcin Semczuk (University of Barcelona) will be visiting us from Tuesday to Thursday next week. If you would like to meet with Marcin during his visit, please let me know. Cheers, Ivan

• Date:
  Dec. 2, 2025, 11 a.m. – noon
  
  
• Location:

  AIP; Kirch building, Conference room

  
  
• Contact:
  Ivan Minchev
  iminchev@aip.de