The James Webb Space Telescope (JWST, Gardner et al. 2006) is a 6.5 m space telescope
launched in 2021 December and is developed by the National Aeronautics and Space …

Context. The elemental depletion of interstellar sulfur from the gas phase has been a
recurring challenge for astrochemical models. Observations show that sulfur remains …

Context. JWST has taken the sharpest and most sensitive infrared (IR) spectral imaging
observations ever of the Orion Bar photodis-sociation region (PDR), which is part of the …

Hydride molecules lie at the base of interstellar chemistry, but the synthesis of sulfuretted
hydrides is poorly understood and their abundances often crudely constrained. Motivated by …

Context. Sulphur-bearing species are detected in various environments within Galactic star-
forming regions and are particularly abundant in the gas phase of outflow and shocked …

Context. The sulfur abundance is poorly known in most environments. Yet, deriving the
sulfur abundance is key to understanding the evolution of the chemistry from molecular …

We investigate the presence of complex organic molecules (COMs) in strongly UV-irradiated
interstellar molecular gas. We have carried out a complete millimetre (mm) line survey using …

Previous work has shown the Orion Bar to be an interface between ionized and molecular
gas, viewed roughly edge-on, which is excited by the light from the Trapezium cluster. Much …

Context. An ever growing number of observational and theoretical evidence suggests that
the deuterated fraction (column density ratio between a species containing D and its …

Context. Sulphur is one of the most abundant elements in the Universe (S/H~ 1.3× 10− 5)
and plays a crucial role in biological systems on Earth. The understanding of its chemistry is …