Observations that resolve nearby galaxies into individual regions across multiple phases of
the gas–star formation feedback “matter cycle” have provided a sharp new view of molecular …

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 …

Context. The global context of making numerous data produced by researchers available
requires collecting and organising the data, assigning meaningful metadata, and presenting …

A new version of the MQCT program is presented, which includes an important addition,
adiabatic trajectory approximation (AT-MQCT), in which the equations of motion for the …

Context. In the centre of pre-stellar cores, deuterium fractionation is enhanced due to low
temperatures and high densities. Therefore, the chemistry of deuterated molecules can be …

A computationally affordable methodology is developed to predict cross sections and rate
coefficients for collisional quenching and excitation of large molecules in space, such as …

We use spectra and maps of the J= 1− 0 and J= 2− 1 DCO+, DCN, DNC, lines, and 111−
101 ortho-and para-NH2D lines, obtained with the Institut de Radioastronomie Millimétrique …

Ionization drives important chemical and dynamical processes within protoplanetary disks,
including the formation of organics and water in the cold midplane and the transportation of …

ABSTRACT Hydronium (H3O+) was first detected in 1986 in interstellar molecular clouds. It
was reported in many Galactic diffuse and dense regions, as well as in extragalactic …

The formyl cation (HCO+) is one of the most abundant ions in molecular clouds and plays a
major role in the interstellar chemistry. For this reason, accurate collisional rate coefficients …