X-Ray and Gamma-Ray Emission from Active Galactic Nuclei

Details X-Ray and Gamma-Ray Emission from Active Galactic Nuclei X-Ray and Gamma-Ray Emission from Active Galactic Nuclei

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275...53c&link_type=abstract

Astronomy and Astrophysics, Vol.275, NO. 1/AUG(I), P. 53, 1993

Astronomy and Astrophysics

Astrophysics

7

Scientific paper

We assume that the centers of some active galactic nuclei consist of a super-massive non-rotating black hole surrounded by a magnetized, cool Keplerian disk and a magnetosphere which is resembling that found surrounding a magnetic neutron star in an accreting binary system. Flux tubes passing through two differential rotation regions could result in a large potential drop along the B-field lines. Electrons are expected to accelerate roughly along the flux tube but their energies are limited by curvature radiation. The ultra-high energy curvature photons are energetic enough to produce secondary e^+/-^ pairs in collisions with the ambient infrared photons. These secondary pairs will radiate synchrotron photons in a wide energy range but only those photons with energies in the range of 10 GeV and below can escape from the ambient UV and soft X-ray photon field. The γ-ray spectral index is luminosity dependent, but the X-ray spectral index is very insensitive to the luminosity, We use 3C 279 and 3C 273 to illustrate our model.

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