Molecular absorption and emission bands dominate the visible, infrared, and submillimeter
spectra of most objects with associated gas. These observations reveal a surprisingly rich …

Stars form within molecular clouds but our understanding of this fundamental process
remains hampered by the complexity of the physics that drives their evolution. We review our …

ABSTRACT We present Herschel Spectral and Photometric Imaging Receiver Fourier
Transform Spectrometer (Herschel SPIRE-FTS) observations of Arp 220, a nearby ultra …

A brief introduction and overview of the astrochemistry of dust, ice and gas and their
interplay is presented. The importance of basic chemical physics studies of critical reactions …

We report the detection of absorption lines by the reactive ions OH+, H 2 O+ and H 3 O+
along the line of sight to the submillimeter continuum source G10. 6–0.4 (W31C). We used …

Abstract The prototypical F+ H2→ HF+ H reaction possesses a substantial energetic barrier
(~ 800 K) and might therefore be expected to slow to a negligible rate at low temperatures. It …

Context. Tens of light hydrides and small molecules have now been detected over several
hundreds sightlines sampling the diffuse interstellar medium (ISM) in both the solar …

Aims. The HIFI instrument onboard Herschel has allowed high spectral resolution and
sensitive observations of ground-state transitions of three molecular ions: the methylidyne …

Aims. Ionized carbon is the main gas-phase reservoir of carbon in the neutral diffuse
interstellar medium (ISM) and its 158 μm fine structure transition [C ii] is the most important …

We have used the Atacama Pathfinder Experiment 12 m telescope (APEX) to carry out an
absorption study of submillimeter wavelength rotational ground-state lines of H 35 Cl, H 37 …