Keywords:
cosmology
gravitational lensing
galaxy clusters
early universe
numerical simulations
The research activity is mainly focussed in the field of
theoretical and observational cosmology, in particular with the
application of numerical techniques in astrophysics. The study of
the formation of cosmic structures, mostly performed thanks the
comparison of the results of numerical simulations with the most
recent observational data, represents a robust tool to constrain
the main cosmological parameters, like the contributions to the
density parameter coming from the matter and dark energy. In this
framework, thanks to their observability in different wavebands
(optical, X-rays, Sunyaev-Zel'dovich effect, gravitational lensing,
etc.), galaxy clusters play a very important role, being at the top
of the hierarchical process of formation.
Main research interests: determination of the cosmological
parameters using the properties of galaxy clusters (spatial
distribution, topology, velocity field, dipoles); high-resolution
hydrodynamical simulations of galaxy clusters (thermal structure,
X-ray properties, Sunyaev-Zel'dovich effect, dynamical models);
cosmological modelling (extended study of non-gaussian models and
tilted/antitilted models; constraints on quintessence models);
theoretical modelling of the clustering evolution of cosmic
structures and constraints on the cosmological parameters from the
comparison with observational data (high-redshift galaxies,
Lyman-break galaxies, galaxy clusters observed in optical, X-ray
and millimetric bands, quasars); implementation of N-body and
hydrodynamical codes (Particle-Mesh, Piecewise Parabolic Method);
models for the perturbation evolution (non-linear approximations,
eulerian theory, high-order moments, biasing); gravitational
lensing from galaxy clusters (statistics of gravitational arcs,
optimal filtering).