The distinction between Seyfert 1 and Seyfert 2 galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Accretion Disks, Galactic Nuclei, Seyfert Galaxies, X Ray Spectra, Black Holes (Astronomy), Optical Thickness, Spectrum Analysis

Scientific paper

The activity of the nuclei of Seyfert 1 galaxies could represent two-temperature disk-type accretion onto a supermassive black hole, while the activity in Seyfert 2 nuclei would correspond to the accretion regime of an optically thin disk. The parameters of such a disk are evaluated. Seyfert 2 nuclei should generate an X-ray luminosity Lx = 10 to the 42nd to 10 to the 43rd erg/sec, the flux declining exponentially with energy for (h)(nu) not less than approximately 10 keV.

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