The coherent magnetic field the Milky Way and UHECR propagation

by Alexander Korochkin (ULB)

Thursday 5 Dec 2024, 15:00 → 16:30 Europe/Berlin

seminar room 3 (bldg. 1b)

The Galactic magnetic field (GMF) is an integral part of the Galaxy, yet it remains poorly understood. It can be probed using various tracers, including Faraday rotation measures (RM) of Galactic and extragalactic sources, synchrotron emission from relativistic leptons, as well as the polarized emission of cosmic dust. In this talk I will present the new model of the coherent GMF fitted to extragalactic RMs and the WMAP 23 GHz dataset. First, I will give a brief overview of the existing GMF models and then discuss the new features of our model. These include the Local Bubble, the Fan Region, higher pitch angle of the disk field, and a new statistical technique. Finally, I will discuss the implications of our new model for the propagation of ultra-high-energy cosmic rays (UHECRs).