Gas phase Elemental abundances in Molecular CloudS (GEMS) is an IRAM 30 m Large
Program designed to provide estimates of the S, C, N, and O depletions and gas ionization …

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 …

Context. The chemical and physical evolution of starless and pre-stellar cores are of
paramount importance to understanding the process of star formation. The Taurus Molecular …

Episodic accretion in protostars leads to luminosity outbursts that end up heating their
surroundings. This rise in temperature pushes the snow lines back, enabling the desorption …

Scattering of H2 on CO is of great importance in astrophysics and also is a benchmark
system for comparing theory to experiment. We present here a new 6-dimensional potential …

Astronomers use the CS molecule as a gas mass tracer in dense regions of the interstellar
medium, to measure either the gas density through multiline observations or the level of …

Carbon monoxide is one of the most abundant components in many interstellar media and
modeling its spectra requires knowledge of rate coefficients for the rotational (de-) excitation …

Rate coefficients for state-to-state rotational transitions of C3N− induced by collision with
both ortho-and para-H2 are presented. Quantum calculations are performed at the close …

C3 is a molecular chain which has been observed in interstellar clouds and in comets. It is
also a very floppy molecule for which the vibrational bending transitions are in the same …

Context. A solar-type system starts from an initial molecular core that acquires organic
complexity as it evolves. The so-called prestellar cores that can be studied are rare, which …