The X and UV emissions of active galactic nuclei

Details The X and UV emissions of active galactic nuclei The X and UV emissions of active galactic nuclei

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cha%26a..11...94l&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 11, Issue 2, p. 94-99.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

A statistical analysis of 87 optical selected quasars and 30 type I Seyfert galaxies is carried out in this paper. Using a quasi-Monte-Carlo method, the relation between the 2 keV monochromatic X-ray luminosity 1X and ~2500A monochromatic ultraviolet luminosity is calculated and the result is: 1x ~ 10bp, b = 0.93 +/- 0.18 when the accretion rate << cr, and b = 0.28 +/- 0.18 when > cr.
A detailed semi-quantitative physical discussion of our results ruled out many available radiative mechanisms. We conclude that the most plausible dominant radiation in the band from 2500A UV to 2 keV soft X-ray is non-thermal synchrotron radiation. We discuss that when the accretion rate is growing, most of the X radiation is dragged into the black hole (the dragging effect). This is the main reason why the X-ray luminosity increases much more slowly with M than does the UV luminosity.
Finally, in the context of pure luminosity evolution, we have obtained that 1x evolves more slowly than does 10p.

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