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Astron. Astrophys. 323, L45-L48 (1997)

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Letter to the Editor

On the nonthermal emission in active galactic nuclei

R.T. Gangadhara 1 and H. Lesch 2

1 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
2 Institut für Astronomie und Astrophysik der Universität München, Scheinerstrasse 1, D-81679 München, Germany

Received 20 February 1997 / Accepted 15 May 1997


We consider the role of centrifugal force on the energetics of electrons moving along the magnetic field lines of spinning active galactic nuclei. We find the energy gained by charged particles against inverse Compton scattering and/ synchrotron radiation losses, become quite significant in the region close to the light cylinder. The particles accelerated by the centrifugal force become a part of the jet material. The scattering of UV-photons against the energetic electrons lead to the generation of X-ray and [FORMULA] -ray photons within the light cylinder, and outside, they radiate the non-thermal optical radiation via the synchrotron emission.

Key words: Galaxis: active – nuclei – jets

© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998