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On the influence of resonant absorption on the iron emission line profiles from accreting black holes
Mateusz Ruszkowski, Andrew C. Fabian
The fluorescent iron K emission line profile provides an excellent probe of the innermost regions of active galactic nuclei. Fe XXV and Fe XXVI in diffuse plasma above the accre…
The soft X-ray background: evidence for widespread disruption of the gas halos of galaxy groups
K. K. S. Wu, A. C. Fabian, P. E. J. Nulsen
Almost all of the extragalactic X-ray background (XRB) at 0.25 keV can be accounted for by radio-quiet quasars, allowing us to derive an upper limit of 4 \bgunit\ for the remaining…
The X-ray variability of the Seyfert~1 galaxy MCG-6-30-15 from long ASCA and RXTE observations
J. C. Lee, A. C. Fabian, C. S. Reynolds +2
We present an analysis of the long RXTE observation of the Seyfert~1 galaxy MCG-6-30-15, taken in July 1997. Our results show that the behaviour is complicated. We find clear evide…
Fuelling quasars with hot gas
P. E. J. Nulsen, A. C. Fabian
We consider a model for quasar formation in which massive black holes are formed and fuelled largely by the accretion of hot gas during the process of galaxy formation. In standard…
BeppoSAX unveils the nuclear component in NGC 6240
P. Vignati, S. Molendi, G. Matt +10
The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed for the first time by BeppoSAX. It is seen through an absorber with N_H=2*10^{24} cm^{…
Fitting the spectrum of the X-ray background: the effects of high metallicity absorption
R. J. Wilman, A. C. Fabian
Recent work by Risaliti et al.(1999) suggests that more than half of all Seyfert 2 galaxies in the local universe are Compton-thick (N_H > 10^24 cm^-2). This has implications for A…