Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..120c.567h&link_type=abstract
Astronomy and Astrophysics Supplement, v.120, p.567-570
Astronomy and Astrophysics
Astrophysics
Radiation Mechanisms: Non-Thermal, Quasars: General, Quasars: Individual: 3C 273, Gamma Rays: Theory
Scientific paper
We present a model explaining the high energy emission of blazars by Inverse Compton process from a relativistic e^+^-e^-^ pair beam. Pairs are produced by γ-γ absorption in the beam, which is also responsible for the spectral break observed in the MeV range. An non-thermal annihilation component is also predicted by the model, that could explain the so-called ``MeV blazars''. If Inverse Compton occurs on soft photons from an accretion disk, we show that all parameters of the beam (site of formation, bulk Lorentz factor, density) can be predicted with very few free parameters, essentially the beam radius and the soft photon luminosity. In the spirit of the two-flow model, the confinement and the heating of pairs can be provided by a surrounding MHD jet launched by the accretion disk, acting like an energy reservoir.
Henri Gilles
Marcowith Alexandre
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