The recent discovery of small active nuclei (via emission lines) in normal spiral galaxies greatly expands the range of the quasar phenomenon. By using the relationship between Lx and L(H-alpha) found in more luminous Seyfert galaxies and assuming that it holds for smaller active nuclei, a bivariate X-ray luminosity function can be calculated. This luminosity function fits naturally onto the higher luminosity X-ray luminosity function derived from the HEAO-1/A2 survey. The contribution to the X-ray background from small active nuclei hiding in large spiral galaxies is greater than 15 percent.
'Microquasars' and the X-ray background
Advances in Space Research ; 3 , 10-12
1984-01-01
Sonstige
Keine Angabe
Englisch
A Multi-Flow Model for Microquasars
British Library Conference Proceedings | 2005
|XMM-Newton Observations of the Microquasars GRO J1655-40 and GRS 1915+105
British Library Conference Proceedings | 2005
|A search for the signature of microquasars in the cosmic ray iron spectrum measured by TIGER
Online Contents | 2006
|A search for the signature of microquasars in the cosmic ray iron spectrum measured by TIGER
British Library Conference Proceedings | 2006
|