The far-IR view of Sgr B2 and Orion KL: Template Star-Forming Regions

LERMA–LRA, UMR 8112, CNRS, Observatoire de Paris and École Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France

Abstract

We summarize the main highlights from ISO observations towards Sgr B2 and Orion KL in the far–IR domain (~43 to 197 μm). Both Star–Forming Regions are among the best sources to construct a template for more distant and unresolved regions (e.g., extragalactic). We stress some peculiarities in the interpretation (excitation and radiative transfer) of far–IR spectral lines and dust continuum emission.