Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..636s&link_type=abstract
Astrophysical Journal, Part 1, vol. 240, Sept. 1, 1980, p. 636-641.
Astronomy and Astrophysics
Astronomy
8
Compton Effect, Galactic Radiation, Gamma Ray Astronomy, High Energy Electrons, Seyfert Galaxies, X Ray Astronomy, Relativistic Particles, X Ray Spectra
Scientific paper
The recently reported spectral features of NGC 4151 in the hard X-ray and γ-ray energy range are analyzed. A two-component emission model is suggested in which the ultraviolet and soft Xray photons (E 20 keV) are scattered by relativistic electrons via the inverse Compton process into the hard X-ray and y-ray regime. It is shown that the rather fiat, hard X-ray spectrum can be explained if a low-energy cutoff in the relativistic electron distribution is postulated. The concept of a low-energy cutoff in the electron distribution is not inconsistent with the observed overall continuum emission of NGC 4151.
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