Energy dissipation channels in highly magnetized relativistic jets

30/03/2022 - 14:00 - 15:00
Remoto, com transmissão pela internet
Energy dissipation channels in highly magnetized relativistic jets

Omer Bromberg

Tel Aviv University, IL
It is well established that most astrophysical relativistic jets are powered electromagnetically by the rotational energy of a central compact object, likely an accreting black-hole (BH). However, how this energy is mediated to particles and transferred to the observed radiation is a subject of active debates. AGN jets show evidence for efficient energy dissipation over a large range of length scales. Putative emission is observed coming from the vicinity of the BH at distances of a few gravitational radii, as seen in the galaxy M87 by the event horizon telescope collaboration, whereas the jet itself emits energy at distances 6-7 orders of magnitude larger. This calls for more than one dissipation process to come into play. In this talk I will review several possible energy dissipation channels operating at different scales from the BH. I will discuss the required conditions for each process to work, the physical model and observational consequences. I will also discuss plans for future studies.