SCIENTIFIC INTERESTS & RESEARCH PROGRAM
My present research activity is focused on the investigation of the
physical conditions of matter around black holes and it is mainly based
on the analysis and interpretation of X-ray data
from different classes of AGN (especially Radio
Galaxies, Blazars, Narrow Line Seyfert 1 galaxies, and true type 2 AGN).
I try to combine complementary pieces of information from
the investigations of both AGN and GBHs to probe the unification
of black hole systems at three different levels:
1) The unification among the different classes of AGN, with particular focus on the radio-loud/radio quiet dichotomy
2) The unification between active and normal galaxies, investigated by studying the X-ray nuclear properties of bulgeless galaxies and Low-power AGN, which may represent the link between powerful AGN and normal galaxies.
3) The unification between AGN and Galactic Black Hole systems, with particular emphasis for the variability properties .
My undergraduate and doctoral scientific background
is in the field of
theoretical astrophysics, applied especially to jets. My first
work was focused on the radiative acceleration of jets in
Galactic Nuclei. During my
studies I was concerned about the
superluminal galactic sources GRS 1915+105 and GRO J1655-40. More
I have dealt with the energetics of the jets and their formation from a
magnetized accretion disk, by using a 2D MHD
In the framework of the Training ans Mobility Research program ``Accretion onto Black Holes, Compact Stars and Protostars" , I concentrated on accretion and ejection processes in AGN both from the theoretical (modeling and numerical simulations) and observational (X-ray analysis from different satellites and optical observations at the Skinakas telescope) point of view and established collaborations with other nodes (namely the Universities of Milano and Heraklion) involved in the TMR network. At MPE I worked extensively on the analysis and interpretation of X-ray data from AGN (taken by ROSAT, SAX, ASCA and recently by XMM). At the same time I have pursued some long-term theoretical work, concerning the time evolution of a geometrically and optically thick accretion disk.