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Powerful non-thermal emission has been detected coming from relativistic collimated outflows launched in the vicinity of black holes of a very wide range of masses, from few to $\sim 10^{10}$ M$_{\odot}$. At different scales along the outflows, i.e. $\sim 10-10^{10} R_{\rm Sch}$ from the black hole, the local conditions can lead to the generation of non-thermal populations of particles via, e.g., magnetic reconnection, magneto-centrifugal mechanisms, diffusive processes, or the so-called converter mechanism. These non-thermal populations of particles, interacting with dense matter, magnetic, and radiation fields, could yield radio-to-gamma-ray emission via synchrotron process, inverse Compton scattering, relativistic Bremsstrahlung, proton-proton and photo-hadron colissions, and even heavy nuclei photo-disintegration. Other processes, like pair creation or the development of electromagnetic cascades, could be also relevant in black-hole jets and their surroundings. Black holes of different masses, accretion rates and environments show different phenomenologies, as can be observed in AGNs, GRBs or microquasars. Nonetheless, these sources basically share the same fundamental physics:

Author

Bosch-Ramon, V.

Published

2009

Language

EN