Resumen:
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Since the accidental discovery in 1909 by Fath of rare and intense emission lines in the optical spectra of the “spiral nebulae”, the study of the active galactic nuclei nature has been the subject of intense research. Today we think that these violent structures, found in the center of some galaxies, are powered by a very massive black hole of often more than 108 M . They are capable of sustaining very large luminosities of, up to 1015 L , based solely on an efficient accretion mechanism. It is not uncommon to see collimated jets extending perpendicularly to the accretion disk to distances equivalent to the size of the host galaxy, with intense emission across the entire electromagnetic spectrum. Active galactic nuclei are also extreme particle accelerators, but it is not clear where and how exactly this process takes place. The accelerated charged particles can in turn emit non-thermal radiation via several mechanisms, which can be detected from radio to -rays...
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