Chemical models used to study the chemical composition of the gas and the ices in the
interstellar medium are based on a network of chemical reactions and associated rate …

We present an extended version of the two-phase gas–grain code nautilus to the three-
phase modelling of gas and grain chemistry of cold cores. In this model, both the mantle and …

Despite the harsh conditions of the interstellar medium, chemistry thrives in it, especially in
star-forming regions where several interstellar complex organic molecules (iCOMs) have …

Context. The increased sensitivity and high spectral resolution of millimeter telescopes allow
the detection of an increasing number of isotopically substituted molecules in the interstellar …

Recent observations have revealed the existence of complex organic molecules (COMs) in
cold dense cores and pre-stellar cores. The presence of these molecules in such cold …

Context. Massive stars form within dense clumps inside giant molecular clouds (GMCs).
Finding appropriate chemical tracers of the dense gas (n (H 2)> several 10 4 cm− 3 or AV> 8 …

GEMS is an IRAM 30 m Large Program whose aim is determining the elemental depletions
and the ionization fraction in a set of prototypical star-forming regions. This paper presents …

Context. Gas accretion flows transport material from the cloud core onto the protostar. In
multiple protostellar systems, it is not clear if the delivery mechanism is preferential or more …

Aims. Bright ring-like structure emission of the CN molecule has been observed in
protoplanetary disks. We investigate whether such structures are due to the morphology of …

The gas-phase reaction networks are the backbone of astrochemical models. However, due
to their complexity and nonlinear impact on the astrochemical modeling, they can be the first …