Results 21 to 30 of about 2,333 (202)

Laboratory surface astrochemistry experiments [PDF]

Review of Scientific Instruments, 2015
Although several research groups have studied the formation of H2 on interstellar dust grains using surface science techniques, few have explored the formation of more complex molecules. A small number of these reactions produce molecules that remain on the surface of interstellar dust grains and, over time, lead to the formation of icy mantles.
Frankland, Victoria, Rosu-Finsen, A, Lasne, J, Collings, MP, McCoustra, MRS   +4 more
openaire   +4 more sources

Three-body aggregation of guest molecules as a key step in methane hydrate nucleation and growth

Communications Chemistry, 2022
Gas hydrates have an important role in environmental and astrochemistry, as well as energy materials, but the hydrate nucleation process is not fully understood.
Wenfeng Hu, Cong Chen, Jingyue Sun, Ning Zhang, Jiafei Zhao, Yu Liu, Zheng Ling, Weizhong Li, Weiguo Liu, Yongchen Song   +9 more
doaj   +1 more source

Identification of solid N2O in interstellar ices using open JWST data

Astronomy & Astrophysics
Context. Only six molecules containing an N-O bond are detected in the gaseous phase of the interstellar medium. One of them is nitrous oxide (N2O), which was unsuccessfully searched for in solid form since the launch of the Infrared Space Observatory ...
Karteyeva V., Nakibov R., Petrashkevich I., Medvedev M., Vasyunin A.   +4 more
doaj   +1 more source

Infrared spectra of methane-containing ice mixtures for JWST data analyses

Astronomy & Astrophysics
Context. Solid methane (CH4) is an important molecule in interstellar and planetary environments, serving as a precursor to complex organic compounds, and it is a potential biosignature in exoplanetary studies.
Karteyeva V., Nakibov R., Petrashkevich I., Medvedev M., Vasyunin A.   +4 more
doaj   +1 more source

A KINETIC DATABASE FOR ASTROCHEMISTRY (KIDA) [PDF]

The Astrophysical Journal Supplement Series, 2012
Accepted for publication in ...
Wakelam, Valentine, Herbst, E., Loison, J. -C., Smith, I. W. M., Chandrasekaran, V., Pavone, B., Adams, N. G., Bacchus-Montabonel, M. -C., Bergeat, A., Béroff, K., Bierbaum, V. M., Chabot, M., Dalgarno, A., van Dishoeck, E. F., Faure, A., Geppert, W. D., Gerlich, D., Galli, D., Hébrard, Eric, Hersant, F., Hickson, K. M., Honvault, P., Klippenstein, S. J., Le Picard, Sébastien D., Nyman, G., Pernot, P., Schlemmer, S., Selsis, Franck, Sims, Ian R, Talbi, D., Tennyson, J., Troe, J., Wester, R., Wiesenfeld, L.   +33 more
openaire   +6 more sources

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

Cretaceous-Tertiary boundary deposits in Denmark: A diachroneity [PDF]

Journal of the Serbian Chemical Society, 2004
The lateral distribution of predominantly terrestrial kerogen or humics enriched with copper(II) porphyrins (Cu-P) across the Danish marine basin implies that the alleged Cretaceous-Tertiary (KT) boundary deposits in western Denmark (at the Nye Kløv ...
Premović Pavle I.
doaj   +1 more source

Confined Chemistry in Space: Zeolite‐Supported Fe13 Nanoclusters Modulate CS Reactivity

Small Structures, Volume 7, Issue 3, March 2026.
The study explores how an Fe13 cluster confined in chabazite reshapes the reaction of CS and H2 under astrochemical conditions. Confinement promotes C–S bond cleavage over hydrogenation, directing chemistry toward CH4 and H2S formation. Additional CS enables CS2 and C2 species. Microkinetic analysis identifies protoplanetary environments where zeolites
Gerard Pareras, Albert Rimola
wiley   +1 more source

ASTROCHEMISTRY OF STAR FORMATION

Odessa Astronomical Publications, 2013
Star formation is one of the key pro­cesses governing the evolution of the Universe. It is ac­companied by significant transformations in the chem­ical composition and the physical state of the inter­stellar medium. Combining observations in infrared and
D. S. Wiebe, O. V. Kochina
doaj   +1 more source

Astrochemistry: Synthesis and Modelling [PDF]

, 2012
We discuss models that astrochemists have developed to study the chemical composition of the interstellar medium. These models aim at computing the evolution of the chemical composition of a mixture of gas and dust under as- trophysical conditions. These conditions, as well as the geometry and the physical dynamics, have to be adapted to the objects ...
Wakelam, Valentine, Herma M., Cuppen, Eric, Herbst   +2 more
openaire   +4 more sources