Active galactic nuclei and the spectrum of the X-ray background.
Abstract
Recent unified theories of Active Galactic Nuclei (AGN) predict the existence of numerous AGN with low energy X-ray cutoff in the 10 keV range. The resulting spectrum of the X-ray background produced by all AGN may easily reproduce the observed spectrum. This removes the main obstacle against theories in which most of the X-ray background is due to AGN.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 1989
- Bibcode:
- 1989A&A...224L..21S
- Keywords:
-
- Active Galactic Nuclei;
- Background Radiation;
- X Ray Astronomy;
- X Ray Spectra;
- Astronomical Spectroscopy;
- Galactic Evolution;
- Interstellar Matter;
- Quasars;
- Seyfert Galaxies;
- Astrophysics