"Heating
of interstellar medium by X-ray radiation from quasars,
statistical properties of active galactic
nuclei based on hard X-ray surveys"
(based on doctor's thesis)
S. Yu. Sazonov (IKI)
Abstract:
Based on the second half of the thesis, the following questions will be addressed:
The problem about the emission spectrum of a typical quasar in the
Universe is formulated and solved; it is shown that Compton and
photoionization heating in the radiation field of such sources
can unbind interstellar gas from the potential
wells of giant elliptical galaxies. As a
consequence, the observed corellation between the stellar
velocity dispersions of galactic bulges and their central black
holes' masses could result from the radiative
feedback of accretion onto supermassive black
holes.
A catalog of active galactic nuclei (AGN) selected by flux in
the X-ray range 3-20 keV is created. It was used to construct the
most accrurate X-ray luminosity function of local AGN and to
demonstrate that the absorption column density distribution is very
different for low-luminosity and high-luminosity AGN. Initial
results of the on-going all-sky survey in hard
X-rays with the INTEGRAL observatory will also
be presented.