Results 111 to 120 of about 31,252 (251)

Formation Pumping of Molecular Hydrogen in Dark Clouds

, 2010
Many theoretical and laboratory studies predict H2 to be formed in highly excited ro-vibrational states. The consequent relaxation of excited levels via a cascade of infrared transitions might be observable in emission from suitable interstellar regions.
Abgrall, Abgrall, Abgrall, Casu, Cesare Cecchi-Pestellini, Congiu, Dalgarno, Duley, Duley, Farahjabeen Islam, Fitzpatrick, Flower, Flower, Flower, Gough, Parneix, Serena Viti, Silvia Casu, Takahashi, Takahashi, Takahashi, Tiné, Williams, Wolniewicz, Zecho   +24 more
core   +1 more source

Interstellar molecules: guides for new chemistry

Chemical Communications, 2010
Interstellar space is among the most remarkable chemical laboratories in the universe. The existence of many unstable species with low-valent main group elements in the interstellar medium inspired us to investigate the feasibility of laboratory synthesis of such unstable molecules.
Mandal, Swadhin K., Roesky, Herbert W.
openaire   +3 more sources

The chemistry of dense interstellar clouds [PDF]

The basic theme of this program is the study of molecular complexity and evolution in interstellar and circumstellar clouds incorporating the biogenic elements.
Irvine, W. M.
core   +1 more source

Cosmic-ray induced diffusion in interstellar ices

, 2014
Cosmic rays are able to heat interstellar dust grains. This may enhance molecule mobility in icy mantles that have accumulated on the grains in dark cloud cores.
Kalvans, Juris
core   +2 more sources

The Chemistry of Interstellar OH+, H2O+, and H3O+: Inferring the Cosmic Ray Ionization Rates from Observations of Molecular Ions

, 2012
We model the production of OH+, H2O+, and H3O+ in interstellar clouds, using a steady state photodissociation region code that treats the freeze-out of gas species, grain surface chemistry, and desorption of ices from grains.
Badnell, Bakes, Cartledge, D. Neufeld, Dalgarno, David Hollenbach, Draine, Goicoechea, Goicoechea, Habing, Heiles, Heiles, Hollenbach, Indriolo, Indriolo, J. R. Goicoechea, Jensen, Jensen, Jochims, Joulain, Krełowski, Le Petit, M. J. Kaufman, M. Wolfire, Mathis, Meyer, Rimmer, Sofia, Weingartner, Weingartner, Wolfire, Wolfire   +31 more
core   +1 more source

New Insights into the Formation of CH₃OCH₃ and CH₃SCH₃ without and with the Assistance of Na⁺ Ions and Some Implications for Interstellar Chemistry: An In Silico Approach [PDF]

, 2023
Sarvesh Kumar Pandey, Subharaj Hossain, Elangnnan Arunan   +2 more
openalex   +1 more source

Organic synthesis applied to space sciences

EPJ Web of Conferences, 2012
About 160 molecules have been detected in the interstellar medium, the comae and the atmospheres of planets. The presence of these compounds leads to imagine a chemistry of these media to explain the formation of these species and to predict the possible
Guillemin J.-C.
doaj   +1 more source

Binding Energies of Interstellar Complex Organic Molecules on Water Ice Surfaces: A Quantum Chemical Investigation

The Astrophysical Journal
Interstellar dust grains are enveloped by ices of frozen molecules in cold, dense regions of the interstellar medium (ISM), which are also observed in the gas phase. Whether a species is in the solid or gaseous state is governed by its binding energy (BE)
Harjasnoor Kakkar, Berta Martínez-Bachs, Cecilia Ceccarelli, Piero Ugliengo, Albert Rimola   +4 more
doaj   +1 more source

Can Cyanide Radicals Drive Molecular Backbone Growth on Interstellar Icy Grains?

The Astrophysical Journal
Motivated by the value of CN-bearing molecules as tracers of interstellar physical conditions, we investigate the reactions of adsorbed CN radicals with acetylene and ethylene (C _2 H _2 and C _2 H _4 ) on interstellar dust-grain analogs using quantum ...
Germán Molpeceres, Joan Enrique-Romero
doaj   +1 more source

Evolutionary Models of Interstellar Chemistry [PDF]

, 1992
S. S. Prasad
openalex   +1 more source