Ph.D. Thesis Abstract for Cyrine Nehmé


Observations multi-longueur d'onde et modelisation de nuages interstellaire du complexe du Cameleon


This thesis is based on multi-wavelength observations of the interstellar matter towards the Chamaeleon molecular cloud complex and modeling of the physical and chemical interaction of interstellar matter with radiation using a Photon Dominated Region (PDR) model. Absorption spectra analysis with FUSE provides the molecular hydrogen formation rate. High resolution UV spectra from STIS/HST and emission spectra of CO and H I helps to clarify the structure of the observed clouds towards HD102065 and determine column densities, abundances and excitations of most relevant species in each physical component.