Chemical reactions on the surface of cosmic ice dust play an important role in chemical
evolution in space. Among the many kinds of molecules observed, the abundances of some …

We have characterized the physical structure and chemical composition of two close-to-
round starless cores in Taurus-Auriga, L1498 and L1517B. Our analysis is based on high …

We have undertaken a survey of N 2 H+ and N 2 D+ toward 31 low-mass starless cores
using the IRAM 30 m telescope. Our main objective has been to determine the abundance …

Most of the carbon in carbonaceous chondrites is organic material that displays structures as
diverse as kerogen-like macromolecules and simpler soluble compounds ranging from polar …

Our current understanding of the physical processes of star formation is reviewed, with
emphasis on processes occurring in molecular clouds like those observed nearby. The …

We present a publicly available, open source version of the time-dependent, gas-grain
chemical code UCLCHEM. UCLCHEM propagates the abundances of chemical species …

We have carried out calculations of ionization equilibrium and deuterium fractionation for
conditions appropriate to a completely depleted, low mass pre-protostellar core, where …

The L1544 pre-stellar core has been observed as part of the ASAI IRAM 30 m Large
Program as well as follow-up programs. These observations have revealed the chemical …

Low-mass dense cores represent the state of molecular gas associated with the earliest
phases of low-mass star formation. Such cores are called" protostellar" or" starless," …

In previous studies, we identified two classes of starless cores, thermally subcritical and
supercritical, distinguished by different dynamical behaviour and internal structure. Here, we …