S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
Gamma-ray emission and mass-loading from stellar populations interacting with an extragalactic jet
Núria Torres Albà
Universitat de Barcelona
Seminari del departament d'Astronomia i Astrofísica
Dimecres 24 gener 2018
Galaxies hosting an active galactic nucleus (AGN) may present relativistic jets, which propagate through the dense medium in the inner regions and interact with dense molecular clouds, young stars or even stellar clusters. In particular, we focus on the presence of whole populations of stars with strong winds entering into the jet, carrying external material which has accumulated around them, and which is peeled away when in contact with the jet pressure. The stars then further inject mass through their own stellar winds, during the full duration of their jet-crossing time. This interaction can lead to the formation of shocks in which particles can be accelerated up to relativistic energies, producing detectable high-energy non-thermal emission, as well as having dynamical effects on the jet, possibly leading to its deceleration.