Water is a fundamental molecule in the universe. On Earth, water exists in all three phases:
gas, liquid, and solid (ice). Liquid water facilitates many chemical reactions as a solvent. …

Interstellar hydrides—that is, molecules containing a single heavy element atom with one or
more hydrogen atoms—were among the first molecules detected outside the solar system. …

An analytic solution is derived for the mean intensity of resonance-line radiation within an
absorbing medium of large scattering optical depth but low density. The line profile, the mean …

We present initial results from the Herschel GT key program: Herschel observations of EXtra-Ordinary
Sources (HEXOS) and outline the promise and potential of spectral surveys with …

Nondissociative, magnetohydrodynamic, C-type shock waves are expected to be a prodigious
source of far-infrared water emissions in dense interstellar regions. We have constructed …

… of interstellar fluorine-bearing molecules has yet been undertaken, although a preliminary
investigation undertaken following the discovery of interstellar hydrogen fluoride ( Neufeld et al…

Although they are only minor constituents of the interstellar medium, halogen-containing
molecules are of special interest because of their unique thermochemistry. Here, we present a …

We have modeled the physical and chemical conditions present within dense circumnuclear
gas that is irradiated by X-rays from an active galactic nucleus. Over a wide range of X-ray …

We report the first detection of interstellar hydrogen fluoride. Using the Long Wavelength
Spectrometer of the Infrared Space Observatory (ISO), we have detected the 121.6973 μ m J= 2…

The excitation of maser emission in millimeter and submillimeter transitions of interstellar and
circumstellar water is considered. An escape probability method is used to determine the …