Far-Infrared Spectroscopy and the Physics and Chemistry of Interstellar Clouds

Abstract

A review is presented of observations of, and interpretation of the intensities of, ionic and atomic fine structure lines and molecular rotational lines arising in interstellar clouds at far-infrared and submillimeter wavelengths (30-1000 μm). Included is a discussion of the nature of high-resolution spectroscopic instrumentation for these wavelengths and a summary of the instruments in use, particularly those on the NASA Kuiper Airborne Observatory.