Rayonnement visible et infrarouge : Soleil, Étoiles, planètes, comètes

Sciences de la Matière et du Rayonnement- Université de Caen, 6

Le syndrome du soleil levant

Morning glory syndrome or rising sun is rare congenital anomaly of the papilla by emergence of the optic nerve in the eye. It is sometimes associated with serious anomalies of the central nervous system. It reaches preferentially girls and most often unilateral. The circumstances of the discovery may be strabismus, amblyopia, nystagmus, leucocoria or refractive disorder. This syndrome may also ...

Status of the Soleil Project1

During this year, the configuration of the ring has been defined (cell structure, periodicity, superperiodicity, length of the straight sections). A large number of operating points have been studied to reach, with a fair safety margin, the project's required performances. Special attention was paid to optimizing energy acceptance up to ± 4 %, leading to a maximized beam lifetime even at very h...

Resolution D’un Probleme Inverse Tridimensionnel Instationnaire Par Une Methode Sequentielle Avec Reduction Des Modes Et Mesure Par Thermographie Infrarouge

A three-dimensional unsteady inverse model has been developed in order to compute heat fluxes and surface temperature in various configurations. Temperature measurements are taken backside using infrared thermography. The number of unknown parameters is reduced using a discrete cosine transform analysis and by canceling values lower than a prescribed level. The efficiency of the method is prove...

OBSERVATOIRE DE PARIS ECOLE DOCTORALE ASTRONOMIE ET ASTROPHYSIQUE D’ILE-DE-FRANCE Doctorat ASTRONOMIE ET ASTROPHYSIQUE par Jǐŕı ŠTĚPÁN Etude du transfert du rayonnement polarisé dans l’atmosphère solaire

The adequate theoretical models of the NLTE radiative transfer are needed for interpretation of the complicated spectra emerging from the magnetized solar atmosphere. In the first part of the thesis, the quantum theory of polarization is reviewed along with the problem of NLTE radiative transfer of the 2nd kind. A general notation for a numerical treatment of the atomic density matrix is introd...