High Excitation ISM and Gas
Peeters, Els; Rodríguez-Fernández, Nemesio J.; Martín-Hernández, Nieves Leticia; Tielens, Xander
United States, Switzerland, France, Netherlands
Abstract
An overview is given of ISO results on regions of high excitation ISM and gas, i.e. H II regions, the Galactic Centre and Supernova Remnants. IR emission due to fine-structure lines, molecular hydrogen, silicates, polycyclic aromatic hydrocarbons and dust are summarised, their diagnostic capabilities illustrated and their implications highlighted.