264 citations · 1.5k across the 48 of their papers we have counts for
25 papers · 1 filter
Collisional excitation of E- and Z-ethanimine to model cold molecular clouds
Francesca Tonolo, Vivek Vijay, Ernesto Quintas-Sánchez +5
Context. Ethanimine is a prebiotically relevant complex organic molecule that has been proposed as a key precursor of amino acids in the interstellar medium. To date, both its E an…
Collisional excitation of cyclopentadiene by helium. A complete set of rate coefficients and astrophysical applications
Sándor Demes, François Lique, Marcelino Agúndez +1
Complex organic molecules, including large cyclic species, are prevalent in interstellar space and play a key role in various astrochemical processes. Cyclopentadiene (c-C5H6) is a…
Isomer-specific excitation of formic acid in collisions with helium atoms
Karina Sogomonyan, Anzhela Veselinova-Marinova, François Lique +1
An accurate estimation of the molecular abundances of isomers in the interstellar medium (ISM) is necessary to unravel the underlying chemistry and physics. After the recent detect…
Carbon chain diversity in L1544 and IRAS 16293-2422: an astrochemical pathfinder study for the SKAO
Lisa Giani, Eleonora Bianchi, Anthony Remijan +12
Astrochemical observations have revealed a surprisingly high level of chemical complexity, including long carbon chains, in the earliest stages of Sun-like star formation. The orig…
Rovibrational (de-)excitation of H by He revisited
Hubert Jóźwiak, Franck Thibault, Alexandra Viel +2
Collisional (de-)excitation of H by helium plays an important role in the thermal balance and chemistry of various astrophysical environments, making accurate rate coefficien…
Collisional excitation of PO by -H
F. Tonolo, L. Bizzocchi, V. M. Rivilla +3
We report the derivation of rate coefficients for the rotational (de-)excitation of PO induced by collisions with H. The calculations were performed on a four-dimensional p…
Hyperfine collisional excitation of ammonia by molecular hydrogen
J. Loreau, A. Faure, F. Lique +2
Ammonia is one of the most widely observed molecules in space, and many observations are able to resolve the hyperfine structure due to the electric quadrupole moment of the nitrog…
Cyanopolyyne chemistry in the L1544 prestellar core: new insights from GBT observations
Eleonora Bianchi, Anthony Remijan, Claudio Codella +9
We report a comprehensive study of the cyanopolyyne chemistry in the prototypical prestellar core L1544. Using the 100m Robert C. Byrd Green Bank Telescope (GBT) we observe 3 emiss…
Linking the dust and chemical evolution: Taurus and Perseus -- New collisional rates for HCN, HNC, and their C, N, and H isotopologues
D. Navarro-Almaida, C. T. Bop, F. Lique +18
HCN, HNC, and their isotopologues are ubiquitous molecules that can serve as chemical thermometers and evolutionary tracers to characterize star-forming regions. Despite their impo…
An improved study of HCO+ and He system: interaction potential, collisional relaxation and pressure broadening
F. Tonolo, L. Bizzocchi, M. Melosso +4
In light of its ubiquitous presence in the interstellar gas, the chemistry and reactivity of the HCO+ ion requires special attention. The availability of up-to-date collisional dat…
Sulfur gas-phase abundance in dense cores
P. Hily-Blant, G. Pineau des Forêts, A. Faure +1
The abundance of volatile sulfur in dense clouds is long-standing problem in studies of the physics and chemistry of star-forming regions. Sulfur is an important species because it…
Collisional excitation and non-LTE modelling of interstellar chiral propylene oxide
K. Dzenis, A. Faure, B. A. McGuire +7
The first set of theoretical cross sections for propylene oxide (CH3CHCH2O) colliding with cold He atoms has been obtained at the full quantum level using a high-accuracy potential…
Deuterium fractionation of nitrogen hydrides: detections of NHD and ND
A. Bacmann, A. Faure, P. Hily-Blant +5
Although ammonia is an abundant molecule commonly observed towards the dense interstellar medium, it has not yet been established whether its main formation route is from gas-phase…
The Leiden Atomic and Molecular Database (LAMDA): Current Status, Recent Updates, and Future Plans
Floris van der Tak, François Lique, Alex Faure +2
The Leiden Atomic and Molecular Database (LAMDA) collects spectroscopic information and collisional rate coefficients for molecules, atoms, and ions of astrophysical and astrochemi…
ALMA and ROSINA detections of phosphorus-bearing molecules: the interstellar thread between star-forming regions and comets
V. M. Rivilla, M. N. Drozdovskaya, K. Altwegg +11
To understand how Phosphorus-bearing molecules are formed in star-forming regions, we have analysed ALMA observations of PN and PO towards the massive star-forming region AFGL 5142…
C-type shock modelling -- the effect of new H-H collisional rate coefficients
A. V. Nesterenok, D. Bossion, Y. Scribano +1
We consider collisional excitation of H molecules in C-type shocks propagating in dense molecular clouds. New data on collisional rate coefficients for (de-)excitation of H…
Formation of interstellar SH from vibrationally excited H: Quantum study of S + H SH + H reactions and inelastic collisions
Alexandre Zanchet, Francois Lique, Octavio Roncero +2
The rate constants for the formation, destruction, and collisional excitation of SH are calculated from quantum mechanical approaches using two new SH potential energy su…
Collisional Excitation and Weak Maser Action of Interstellar Methanimine
Alexandre Faure, François Lique, Anthony J. Remijan
The inelastic cross sections and rate coefficients for the rotational excitation of methanimine (CHNH) by cold H have been determined quantum mechanically based on a new hi…
Abundance of HCN and its C and N isotopologues in L1498
Victor S. Magalhaes, Pierre Hily-Blant, Alexandre Faure +2
The isotopic ratio of nitrogen in nearby protoplanetary disks, recently measured in CN and HCN, indicates that a fractionated reservoir of nitrogen is available at the stage of com…
Collisional excitation of HC3N by para- and ortho-H2
A. Faure, F. Lique, L. Wiesenfeld
New calculations for rotational excitation of cyanoacetylene by collisions with hydrogen molecules are performed to include the lowest 38 rotational levels of HC3N and kinetic temp…
Stratified NH and ND emission in the prestellar core 16293E in L1689N
A. Bacmann, F. Daniel, P. Caselli +6
High degrees of deuterium fractionation are commonly found in cold prestellar cores and in the envelopes around young protostars. As it brings strong constraints to chemical models…
Collisional excitation of water by hydrogen atoms
F. Daniel, A. Faure, P. J. Dagdigian +3
We present quantum dynamical calculations that describe the rotational excitation of HO due to collisions with H atoms. We used a recent, high accuracy potential energy surface…
Nitrogen isotopic ratios in Barnard 1: a consistent study of the N2H+, NH3, CN, HCN and HNC isotopologues
F. Daniel, M. Gerin, E. Roueff +7
The 15N isotopologue abundance ratio measured today in different bodies of the solar system is thought to be connected to 15N-fractionation effects that would have occured in the p…
Astronomical identification of CN-, the smallest observed molecular anion
M. Agundez, J. Cernicharo, M. Guelin +11
We present the first astronomical detection of a diatomic negative ion, the cyanide anion CN-, as well as quantum mechanical calculations of the excitation of this anion through co…