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SÉMINAIRE DU LERMA
OBSERVATOIRE DE PARIS
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Vendredi 12 février 2010 à 14H


77 avenue Denfert Rochereau, Paris 14



Salle de l'Atelier, Observatoire de Paris





From accurate atomic data to astrophysical modeling



Franck DELAHAYE

Observatoire de Paris/LERMA



Résumé : Complex simulations are central in a growing number of scientific fields such as astrophysics,laboratory astrophysics or inertial fusion science. The predictions of such models are strongly correlated to the quality/completeness of the atomic data they are using. In order to fully understand many physical phenomenon such as the solar evolution, supernovae explosion, the simulation of radiative shock or the interpretation of laser experiments, reliable atomic data, and in particular opacities, are needed.
However, providing the data is not enough anymore. It is necessary to be able to qualify them, quantify the uncertainties attached so one can propagate them into the simulation. Diagnostic tools must be developed to allow users/producers to choose/analyze the data they need/provide. And finally a suitable set of services must be provided in order to allow a large ensemble of the scientific community to access and test these data for use/validation/improvement.
I will present some results of stellar application in order to outline the importance of the atomic data and present different activities we are developing in order to fulfill the needs of the users/producers.