Observatoire des Sciences de l'Univers de Besancon (France)
Description:
The model of stellar population synthesis is used to elaborate a global view of the Galaxy including dynamical and evolutionary aspects. Scenarii for the formation and evolution produces theoretical distribution functions which are directly compared with survey observations of different types (photometry, kinematics, abundance distributions) The kinematical and dynamical point of view is linked to an evolution scheme through a key parameter, the stellar ages. The age distribution of stars in the solar neighbourhood is derived from a model of galactic evolution. The stellar populations of the galactic disc are selfconsistently constrained by the Boltzmann and Poisson equations through the potential of the mass model. Observational predictions are thus directly derived from an overall description of galactic structure and evolution.
The model can be used for on-line simulations of line of sights. It produces either star counts or catalogues of stars with photometric data in different systems (Johnson-Cousins, Megacam...) and kinematics (proper motions, radial velocities) according to model hypothesis.
Convolution of normalized synthetic stellar spectra.
Up to 3 successive convolutions are allowed on a adjustable portion of a synthetic spectrum, in order to mimic an observable.
These convolutions acount for macroturbulence velocity, rotational velocity and instrumental profile.
Finally, the output can be Doppler-shifted in order to take into account a stellar radial velocity.
