The scientific research of R. Capuzzo-Dolcetta is mainly concerned with the
topic of stellar clusters, but it actually covers a large range in theoretical
and observational astrophysics.
At present R. Capuzzo-Dolcetta scientific activity is mainly devoted to
- smooth particle hydrodynamics and N-body evolution, applied to the
study of multi-phase, self-gravitating astrophysical systems
- dynamical evolution of globular cluster systems in elliptical galaxies,
and resulting AGNs;
- identification of OB associations in unresolved galaxies.
Let's outline some major points in the previous topics.
- A recent development of my interests in numerical
dynamics and hydrodynamics is concerned with the construction of
various smooth particle hydrodynamics (SPH) + N-body codes: a P3M
code and an SPH-tree-code (in collaboration with P. Miocchi and R. Di Lisio).
Some theoretical and numerical original tests have been done. In particular,
a comparison between the
Fast Multipole Method (FMM, widely used in molecular dynamics) and the classic
Barnes and Hut tree-code has been perfomed. It shows that, in spite of the
often claimed linear dependence of FMM cpu time on the particle number N,
tree codes seems to be faster. First applications have been done to newly
formed open star clusters moving in a gaseous medium. Results show that a
correct analysis of the two phase (N-body + gas) dynamics and exchange
is crucial to understand stellar cluster formation and early evolution.
- I am currently studying the effects of dynamical friction and
tidal disruption on globular clusters moving in a triaxial potential. The
most interesting results of this work, still continuing, is that in triaxial
galaxies the cluster distribution and the feeding of a central nucleus and
even its formation can be determined by the two mentioned environmental processes.
Various papers have been published and various cooperations are active, including
ESO-NTT observations of two ascertained triaxials.
- Together with P. Battinelli, S. Adanti and A. Vicari, I have
recently developed and applied a computer code based on cluster analysis
which is aimed to give an almost objective way to discern OB association
in unresolved galaxies. Their first application (with P. Hodge) was to NGC2903,
after checks of suitability done on selected M31 fields. This technique was
applied to 6 spirals, so far: NGC 1058, NGC 3377a, NGC 3507, NGC 4394, NGC
7217 and UGC 12732.
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