198 citations · 1.4k across the 39 of their papers we have counts for
34 papers · 1 filter
Methanimine as a sink in the HCN and HNC solid state hydrogenation network
Joan Enrique-Romero, Thanja Lamberts
We aim to provide a systematic and quantitative description of the hydrogenation network connecting HCN and HNC to methylamine on interstellar water ices, while identifying dominan…
A sensitivity analysis of interstellar ice chemistry in astrochemical models
Tobias M. Dijkhuis, Thanja Lamberts, Serena Viti +1
Astrochemical models are essential to bridge the gap between the timescales of reactions, experiments, and observations. Ice chemistry in these models experiences a large computati…
Chemical templates of the Central Molecular Zone. Shock and protostellar object signatures under Galactic Center conditions
Katarzyna M. Dutkowska, Gijs Vermariën, Serena Viti +21
(Abridged) The Central Molecular Zone (CMZ) of the Milky Way exhibits extreme conditions, including high gas densities, elevated temperatures, enhanced cosmic-ray ionization rates,…
Interstellar Chemistry of CN Radicals on Ices: The formation of CH3CN and CH3NC and potential connection to acetamide
Joan Enrique-Romero, Thanja Lamberts
Context. Among the most significant chemical functional groups of interstellar molecules are the class of nitriles, which are proposed as key prebiotic molecules due to their chemi…
Toward Unraveling Cyanopolyyne Surface Chemistry: A Preview on Isolated Systems From HC_{3}N to Ethyl Cyanide and Propylamine
Marten T. Raaphorst, Joan Enrique-Romero, Thanja Lamberts
Cyanopolyynes, a family of nitrogen containing carbon chains, are common in the interstellar medium and possibly form the backbone of species relevant to prebiotic chemistry. Follo…
Hydrogenation of HOCO and formation of interstellar CO: A not so straightforward relation
Germán Molpeceres, Joan Enrique-Romero, Atsuki Ishibashi +5
Carbon dioxide (CO) is one of the most important interstellar molecules. While it is considered that it forms on the surface of interstellar dust grains, the exact contribution…
Modelling methanol and hydride formation in the JWST Ice Age era
Izaskun Jiménez-Serra, Andrés Megías, Joseph Salaris +19
(Abridged) JWST observations have measured the ice composition toward two highly-extinguished field stars in the Chamaeleon I cloud. The observed extinction excess on the long-wave…
Proposed importance of HOCO chemistry: Inefficient formation of CO from CO and OH reactions on ice dust
Atsuki Ishibashi, Germán Molpeceres, Hiroshi Hidaka +3
With the advent of JWST ice observations, dedicated studies on the formation reactions of detected molecules are becoming increasingly important. One of the most interesting molecu…
Formation of S-bearing complex organic molecules in interstellar clouds via ice reactions with C2H2, HS, and atomic H
Julia C. Santos, Joan Enrique-Romero, Thanja Lamberts +2
The chemical network governing interstellar sulfur has been the topic of unrelenting discussion for the past decades due to the conspicuous discrepancy between its expected and obs…
Detection of Interstellar -1-cyano-1,3-butadiene in GOTHAM Observations of TMC-1
Ilsa R. Cooke, Ci Xue, P. Bryan Changala +12
We report the detection of the lowest energy conformer of -1-cyano-1,3-butadiene (-1-CHCN), a linear isomer of pyridine, using the fourth data reduction of the GOTHAM…
Investigating the impact of reactions of C and CH with molecular hydrogen on a glycine gas-grain network
Johannes Heyl, Thanja Lamberts, Serena Viti +1
The impact of including the reactions of C and CH with molecular hydrogen in a gas-grain network is assessed via a sensitivity analysis. To this end, we vary 3 parameters, namely,…
First experimental confirmation of the CH3O + H2CO -> CH3OH + HCO reaction: expanding the CH3OH formation mechanism in interstellar ices
Julia C. Santos, Ko-Ju Chuang, Thanja Lamberts +3
The successive addition of H atoms to CO in the solid phase has been hitherto regarded as the primary route to form methanol in dark molecular clouds. However, recent Monte Carlo s…
Surface astrochemistry: a computational chemistry perspective
H. M. Cuppen, A. Fredon, T. Lamberts +3
Molecules in space are synthesized via a large variety of gas-phase reactions, and reactions on dust-grain surfaces, where the surface acts as a catalyst. Especially, saturated, hy…
Methoxymethanol Formation Starting from CO-Hydrogenation
Jiao He, Mart Simons, Gleb Fedoseev +7
Methoxymethanol (CH3OCH2OH, MM) has been identified through gas-phase signatures in both high- and low-mass star-forming regions. This molecule is expected to form upon hydrogen ad…
Hydrogenation of accreting C-atoms and CO molecules -- simulating ketene and acetaldehyde formation under dark and translucent cloud conditions
Gleb Fedoseev, Danna Qasim, Ko-Ju Chuang +4
Simple and complex organic molecules (COMs) are observed along different phases of star and planet formation and have been successfully identified in prestellar environments such a…
Carbon Atom Reactivity with Amorphous Solid Water: HO Catalyzed Formation of HCO
Germán Molpeceres, Johannes Kästner, Gleb Fedoseev +4
We report new computational and experimental evidence of an efficient and astrochemically relevant formation route to formaldehyde (HCO). This simplest carbonylic compound is c…
Methane formation in cold regions from carbon atoms and molecular hydrogen
Thanja Lamberts, Gleb Fedoseev, Marc van Hemert +4
Methane is typically thought to be formed in the solid state on the surface of cold interstellar icy grain mantles via the successive atomic hydrogenation of a carbon atom. In the…
Revisiting the reactivity between HCO and CH on interstellar grain surfaces
J. Enrique-Romero, S. Álvarez-Barcia, F. J. Kolb +7
Formation of interstellar complex organic molecules is currently thought to be dominated by the barrierless coupling between radicals on the interstellar icy grain surfaces. Previo…
Efficient Production of S in Interstellar Ices: The effects of cosmic ray-driven radiation chemistry and non-diffusive bulk reactions
Christopher N. Shingledecker, Thanja Lamberts, Jacob C. Laas +4
In this work, we reexamine sulfur chemistry occurring on and in the ice mantles of interstellar dust grains, and report the effects of two new modifications to standard astrochemic…
Alcohols on the rocks: solid-state formation in a H3CCCH + OH cocktail under dark cloud conditions
D. Qasim, G. Fedoseev, T. Lamberts +5
A number of recent experimental studies have shown that solid-state complex organic molecules (COMs) can form under conditions that are relevant to the CO freeze-out stage in dense…
Formation of Acetaldehyde on CO-rich Ices
Thanja Lamberts, Max N. Markmeyer, Florian J. Kolb +1
The radicals HCO and CH on carbon monoxide ice surfaces were simulated using density functional theory. Their binding energy on amorphous CO ice shows broad distributions, with…
An infrared measurement of chemical desorption from interstellar ice analogues
Y. Oba, T. Tomaru, T. Lamberts +2
In molecular clouds at temperatures as low as 10 K, all species except hydrogen and helium should be locked in the heterogeneous ice on dust grain surfaces. Nevertheless, astronomi…
Tunnelling dominates the reactions of hydrogen atoms with unsaturated alcohols and aldehydes in the dense medium
V. Zaverkin, T. Lamberts, M. N. Markmeyer +1
Hydrogen addition and abstraction reactions play an important role as surface reactions in the buildup of complex organic molecules in the dense interstellar medium. Addition react…
From interstellar carbon monosulfide to methyl mercaptan: paths of least resistance
T Lamberts
The 29 reactions linking carbon monosulfide (CS) to methyl mercaptan (CH3SH) via ten intermediate radicals and molecules have been characterized with relevance to surface chemistry…