Y. Ellinger
YOU?
Author Swipe
View article: Building formamide and N-substituted formamides from isocyanates on hydrogenated water ices
Building formamide and N-substituted formamides from isocyanates on hydrogenated water ices Open
Context. Many complex organic molecules (COMs) observed in the interstellar medium (ISM) are probably not formed in the gas phase. A large consensus has developed that it could be related to the icy surfaces in this environment. Aims. We i…
View article: Thermodynamical stability of [CNN and NCN] sequences as indication of most abundant structures in the ISM
Thermodynamical stability of [CNN and NCN] sequences as indication of most abundant structures in the ISM Open
Context. Most of the molecules identified in the interstellar medium (ISM) are organic compounds and more than 50 have one isomer or more. Statistically, the most stable isomer of a given chemical formula is the most abundant. This occurre…
View article: Meteoritic amino acids as chemical tracers of parent-body chemistries
Meteoritic amino acids as chemical tracers of parent-body chemistries Open
The analysis of the organic matter of meteorites made it possible to identify over 70 amino acids (AA), including 8 of those found in living organisms. However, their relative abundances vary drastically with the type of the carbonaceous c…
View article: Revisiting the OH + H<sub>2</sub> → H<sub>2</sub>O + H reaction at the molecular level: the plausible catalytic role of ice in its own reconstruction
Revisiting the OH + H<sub>2</sub> → H<sub>2</sub>O + H reaction at the molecular level: the plausible catalytic role of ice in its own reconstruction Open
Context. In spite of the permanent damage suffered from the radiation field (cosmic rays, X-rays, and intense UV-visible radiations), interstellar grains are still covered by ices mantles whose role in interstellar chemistry is well beyond…
View article: Relative thermodynamic stability of the [C,N,O] linkages as an indication of the most abundant structures in the ISM
Relative thermodynamic stability of the [C,N,O] linkages as an indication of the most abundant structures in the ISM Open
Context. Most of the compounds detected in the interstellar medium (ISM) that possess isomers correspond to the thermodynamically most stable isomer of a given chemical formula. Using the minimun energy principle (MEP) as a pragmatic tool …
View article: Reconstruction of water ice: the neglected process OH + OH → H<sub>2</sub>O + O
Reconstruction of water ice: the neglected process OH + OH → H<sub>2</sub>O + O Open
Context. Although H 2 O is the most important molecular material found in the solid state in the interstellar medium, the chemical routes leading to ice through surface reactions are still a matter of discussion. Three reaction pathways pr…
View article: The quest of chirality in the interstellar medium
The quest of chirality in the interstellar medium Open
Context. All but one complex organic molecule (COM) detected so far in the interstellar medium (ISM) are achiral; propylene oxide (c-C 2 H 3 O)-CH 3 is the only exception to this. Finding other chiral species is a priority for astrobiology…
View article: Formation of amines: hydrogenation of nitrile and isonitrile as selective routes in the interstellar medium
Formation of amines: hydrogenation of nitrile and isonitrile as selective routes in the interstellar medium Open
Context. Beyond NH 3 , only one primary alkylamine, CH 3 NH 2 , has been identified in the interstellar medium and the reason why is still not understood: its formation could occur in the gas phase or in icy environments. Aims. To consider…
View article: Sodium, Potassium, and Calcium in Europa: An Atomic Journey through Water Ice
Sodium, Potassium, and Calcium in Europa: An Atomic Journey through Water Ice Open
Sodium and potassium are known to be present as neutral elements in the exosphere of Europa. The question of the origin of these alkalis—endogenous or exogenous—remains open. They have been ascribed to exogenous contamination due to volcan…
View article: Noble Gas Abundance Ratios Indicate the Agglomeration of 67P/Churyumov–Gerasimenko from Warmed-up Ice
Noble Gas Abundance Ratios Indicate the Agglomeration of 67P/Churyumov–Gerasimenko from Warmed-up Ice Open
The origin of cometary volatiles remains a major open question in planetary science. Comets may have either agglomerated from crystalline ices condensed in the protosolar nebula (PSN) or from amorphous ice originating from the molecular cl…
View article: Limits on the Contribution of Endogenic Radiolysis to the Presence of Molecular Oxygen in Comet 67P/Churyumov–Gerasimenko
Limits on the Contribution of Endogenic Radiolysis to the Presence of Molecular Oxygen in Comet 67P/Churyumov–Gerasimenko Open
Radiolytic production has been proposed as a potential source for the molecular oxygen observed in comet 67P/Churyumov–Gerasimenko. Radiolysis can be exogenic or endogenic, the latter due to radionuclides present in the dust constitutive o…
View article: The millimeter-wave spectrum of methyl ketene and the astronomical search for it
The millimeter-wave spectrum of methyl ketene and the astronomical search for it Open
Context . The analysis of isomeric species of a compound observed in the interstellar medium (ISM) is a useful tool to understand the chemistry of complex organic molecules. It could, likewise, assist in the detection of new species. Aims …
View article: Search for hydrogen-helium molecular species in space
Search for hydrogen-helium molecular species in space Open
Context. Helium, the second most abundant element in the Universe, with a relative abundance of He/H ~ 1/10, has never been observed in any other form than that of a neutral atom (He) or an ion (He + ) in the interstellar medium. Since He …
View article: Protonated ions as systemic trapping agents for noble gases: From electronic structure to radiative association
Protonated ions as systemic trapping agents for noble gases: From electronic structure to radiative association Open
The deficiencies of argon, krypton, and xenon observed in the atmosphere of Titan as well as anticipated in some comets might be related to a scenario of sequestration by H3+ in the gas phase at the early evolution of the solar nebula. The…
View article: Nitrile versus isonitrile adsorption at interstellar grain surfaces II. Carbonaceous aromatic surfaces
Nitrile versus isonitrile adsorption at interstellar grain surfaces II. Carbonaceous aromatic surfaces Open
Almost 20 % of the ~ 200 different species detected in the interstellar and circumstellar media present a carbon atom linked to nitrogen by a triple bond. Of these 37 molecules, 30 are nitrile R-CN compounds, the remaining 7 belonging to t…
View article: Nitrile versus isonitrile adsorption at interstellar grain surfaces
Nitrile versus isonitrile adsorption at interstellar grain surfaces Open
Context. Almost 20% of the ~200 different species detected in the interstellar and circumstellar media present a carbon atom linked to nitrogen by a triple bond. Of these 37 molecules, 30 are nitrile R-CN compounds, the remaining 7 belongi…
View article: Stability of Sulphur Dimers (S<sub>2</sub>) in Cometary Ices
Stability of Sulphur Dimers (S<sub>2</sub>) in Cometary Ices Open
S 2 has been observed for decades in comets, including comet 67P/Churyumov–Gerasimenko. Despite the fact that this molecule appears ubiquitous in these bodies, the nature of its source remains unknown. In this study, we assume that S 2 is …
View article: Communication: The formation of CHe2+ by radiative association
Communication: The formation of CHe2+ by radiative association Open
The detection of ArH+ has revived the interest in the search for noble gas containing species. Despite helium being the second most abundant element in the universe (He/H ∼ 1/10), it has never been observed in any other form than that of a…
View article: About the detection of urea in the interstellar medium: the energetic aspect
About the detection of urea in the interstellar medium: the energetic aspect Open
Context. The results of an observational search for gas phase urea, (NH2)2CO toward the Sgr B2-LMH region, have been reported recently. In spite of strong presumptions, whether it is urea or another species (for example an isomer) seems to…