225 citations · 1.5k across the 39 of their papers we have counts for
39 papers
Quantifying the temperature-dependent yields of N and NH formation in vacuum-ultraviolet-irradiated NH ice
P. Samarth, G. Fedoseev, S. Ioppolo +3
Gas--grain astrochemical models predict that a substantial fraction of elemental nitrogen in dense cores and protoplanetary disks is locked in molecular nitrogen (N), in the ga…
Pulsed ion deflection to overcome detector saturation in cryogenic ice sampling
P. Samarth, M. Bulak, D. Paardekooper +2
In 2014, we introduced a new experimental approach to study the UV photo-processing of cryogenic ices of astrophysical interest using laser ablation in combination with ionization…
In situ characterization of volatile and refractory hydrocarbons produced by UV photolysis of interstellar CH ice
P. Samarth, G. Fedoseev, M. Bulak +5
Acetylene (CH) is commonly observed in star-forming regions, young stellar objects, and the Solar System. Laboratory and theoretical studies have linked this simplest alkyn…
Production of linear alkanes via the solid-state hydrogenation of interstellar polyynes
G. Fedoseev, X. Li, G. A. Baratta +2
Highly unsaturated carbon chains, including polyynes, have been detected in many astronomical regions and planetary systems. With the success of the QUIJOTE survey of the TMC-1, th…
Ammonium hydrosulfide (NH4SH) as a potentially significant sulfur sink in interstellar ices
Katerina Slavicinska, Adwin Boogert, Łukasz Tychoniec +6
Sulfur is depleted with respect to its cosmic standard abundance in dense star-forming regions. It has been suggested that this depletion is caused by the freeze-out of sulfur on i…
Formation of carbonyl sulfide (OCS) via SH radicals in interstellar CO-rich ice under dense cloud conditions
Julia C. Santos, Harold Linnartz, Ko-Ju Chuang
Carbonyl sulfide (OCS) is widely observed in the gas phase towards star-forming regions and was the first of the only two sulfur-bearing species detected in interstellar ices so fa…
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…
Formation of N-bearing complex organic molecules in molecular clouds: Ketenimine, acetonitrile, acetaldimine, and vinylamine via the UV photolysis of CH ice
K. -J. Chuang, C. Jäger, J. C. Santos +1
The solid-state CH chemistry in interstellar HO-rich ice has been proposed to explain astronomically observed complex organic molecules (COMs), including ketene (CH…
A deep search for large complex organic species toward IRAS16293-2422 B at 3 mm with ALMA
P. Nazari, J. S. Y. Cheung, J. Ferrer Asensio +14
Complex organic molecules (COMs) have been detected ubiquitously in protostellar systems. However, at shorter wavelengths (~0.8mm) it is more difficult to detect larger molecules t…
Spatially resolving the volatile sulfur abundance in the HD 100546 protoplanetary disk
Luke Keyte, Mihkel Kama, Ko-Ju Chuang +5
Volatile elements play a crucial role in the formation of planetary systems. Their abundance and distribution in protoplanetary disks provide vital insights into the connection bet…
Interstellar carbonaceous dust erosion induced by X-ray irradiation of water ice in star-forming regions
K. -J. Chuang, C. Jaeger, N. -E. Sie +5
The chemical inventory of protoplanetary midplanes is the basis for forming planetesimals. Among them, solid-state reactions based on CO/CO toward molecular complexity on inter…
CoCCoA: Complex Chemistry in hot Cores with ALMA. Selected oxygen-bearing species
Y. Chen, M. L. van Gelder, P. Nazari +22
Complex organic molecules (COMs) have been observed to be abundant in the gas phase toward protostars. Deep line surveys have been carried out only for a limited number of well-kno…
The hunt for formamide in interstellar ices: A toolkit of laboratory infrared spectra in astronomically relevant ice mixtures and comparisons to ISO, Spitzer, and JWST observations
Katerina Slavicinska, Marina Gomes Rachid, Will Robson Monteiro Rocha +3
This work aims at characterizing the mid-IR spectra of formamide in its pure form as well as in mixtures of the most abundant interstellar ices via laboratory simulation of such ic…
Resonant infrared irradiation of CO and CH3OH interstellar ices
J. C. Santos, K. -J. Chuang, J. G. M. Schrauwen +6
Solid-phase photo-processes involving icy dust grains greatly affect the chemical evolution of the interstellar medium by leading to the formation of complex organic molecules and…
Formation of the simplest amide in molecular clouds: formamide (NHCHO) and its derivatives in HO-rich and CO-rich interstellar ice analogs upon VUV irradiation
K. -J. Chuang, C. J\{"a}ger, S. A. Krasnokutski +2
The astronomical detection of formamide (NHCHO) toward various star-forming regions and in cometary material implies that the simplest amide might have an early origin in dark…
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…
A pathway to peptides in space through the condensation of atomic carbon
S. A. Krasnokutski, K. -J. Chuang, C. Jäger +2
Organic molecules are widely present in the dense interstellar medium, and many have been synthesized in the laboratory on Earth under the conditions typical for an interstellar en…
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…
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…
Formation of complex organic molecules in molecular clouds: acetaldehyde, vinyl alcohol, ketene, and ethanol via the "energetic" processing of CH ice
K. -J. Chuang, G. Fedoseev, C. Scirè +5
The simultaneous detection of organic molecules of the form CHO, such as ketene (CHCO), acetaldehyde (CHCHO), and ethanol (CHCHOH), toward early st…
A non-energetic mechanism for glycine formation in the interstellar medium
S. Ioppolo, G. Fedoseev, K. -J. Chuang +8
The detection of the amino acid glycine and its amine precursor methylamine on the comet 67P/Churyumov-Gerasimenko by the Rosetta mission provides strong evidence for a cosmic orig…
A cryogenic ice setup to simulate carbon atom reactions in interstellar ices
D. Qasim, M. J. A. Witlox, G. Fedoseev +7
The design, implementation, and performance of a customized carbon atom beam source for the purpose of investigating solid-state reaction routes in interstellar ices in molecular c…
An experimental study of the surface formation of methane in interstellar molecular clouds
D. Qasim, G. Fedoseev, K. -J. Chuang +4
Methane is one of the simplest stable molecules that is both abundant and widely distributed across space. It is thought to have partial origin from interstellar molecular clouds,…