High-energy astrophysics on compact objects Accretion on all scales

VIEYRO, F. L.

La Serena

Congreso; Second Binational Meeting AAA-SOCHIAS; 2018

Gamma-ray emission is the ultimate evidence that non-thermal processes are taking place in an astrophysical source. These processes are the result of the presence of relativistic particles interacting with different fields, such as magnetic, radiation or cold matter fields. In this article, I describe the main radiativeprocesses that particles undergo in extreme environments, that result in a signicant fraction of the total emitted power to be released in the gamma-domain. I present the phenomenology related to the different classes of high-energysources involving compact objects, with particular interest in those powered by accretion into black holes. Finally, I discuss some of the open questions associated with these sources.