Prestellar cores represent the initial conditions in the process of star and planet formation.
Their low temperatures (< 10 K) allow the formation of thick icy dust mantles, which will be …

Focusing on the organic inventory of regions of star and planet formation in the interstellar
medium of galaxies, this comprehensive overview of the molecular universe is an invaluable …

Spectral lines of ammonia, NH 3, are useful probes of the physical conditions in dense
molecular cloud cores. In addition to advantages in spectroscopy, ammonia has also been …

Chemical models predict that in cold cores gas-phase methanol is expected to be abundant
at the outer edge of the CO depletion zone, where CO is actively adsorbed. CO adsorption …

We present sensitive observations of NH2D at 110.153 599 GHz toward 50 Galactic massive
star-forming regions with the Institut de Radioastronomie Millimétrique (IRAM) 30-m …

Context. Molecules containing two or more hydrogen or deuterium atoms have different
nuclear spin states which behave as separate chemical species. The relative abundances of …

We develop a self-consistent model for the equilibrium gas temperature and size-dependent
dust temperature in cold, dense, prestellar cores, assuming an arbitrary power-law size …

Context. Star formation takes place in cold dense cores in molecular clouds. Earlier
observations have found that dense cores exhibit subsonic non-thermal velocity dispersions …

We constructed two new models for deuterium and spin-state chemistry for the purpose of
modeling the low-temperature environment prevailing in starless and pre-stellar cores. The …

Context. Pre-stellar cores represent a critical evolutionary phase in low-mass star formation.
Characterisations of the physical conditions of pre-stellar cores provide important constraints …