The study of the structure of stars and of their evolution has a long tradition
in Padova. Extensive grids of evolutionary
stellar models, encompassing the whole range of masses and metallicities, have
been computed and are periodically upgraded by incorporating the latest input
physics. The models are published on the web, together
with the isochrones and tables for a large range of photometric systems.
We model the thermally pulsing AGB
phase with special attention. This is one of the most uncertain stages of the stellar evolution theory,
but it has a strong impact on the properties of intermediate age
The effects of weakly interacting massive Dark Matter particles
(WIMPs) on the collapse and evolution of the first stars in the
Universe are modeled to understand the role of the annihilation of
DM on the fragmentation and mass of the first stars.
Observational data on stellar photometry and spectroscopy are collected and
maintained up-to-date in two databases. The ADPS
documents, calibrates and homogenizes more than 200
existing photometric systems; the ADSD,
a database of spectroscopic databases, documents and homogenizes the
existing databases of stellar spectra, in the UV, optical and IR spectral
Two projects for testing the stellar models are being developed at the
OAPd. In one program we use the Asiago telescope
to derive masses and radii of eclipsing binaries, whose properties are
compared to stellar evolution tracks. Another program deals with
asteroseismological studies, aimed at probing the stellar interior,
using SARG at the TNG.
Complementary projects in the field of stellar
evolution include the
tomography of expanding nebulae to reconstruct their tri-dimensional structure and
mass loss in late evolutionary phases.