Results 91 to 100 of about 35,607 (205)
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
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Origin of Interstellar Molecules [PDF]
Progress of Theoretical Physics, 1973 It is concluded from a thermochemical calculation that the interstellar molecules in the compact H II regions may be formed in places of high temperature and high pressure. A possibility of the locations of molecular formation may be the prestellar atmospheres, but the atmospheres of late type stars are other possible candidates.
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Matrix isolation as a tool for studying interstellar chemical reactions [PDF]
Since the identification of the OH radical as an interstellar species, over 50 molecular species were identified as interstellar denizens. While identification of new species appears straightforward, an explanation for their mechanisms of formation is ...
Ball, David W. +3 more
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Boundary conditions for the paleoenvironment: Chemical and physical processes in the pre-solar nebula [PDF]
Detailed study of the first interstellar hydrocarbon ring, cyclopropenylidene (C3H2), is continuing. The singly deuterated isotope of this molecule, C3HD, was observed in several cold interstellar clouds.
Irvine, William M., Schloerb, F. Peter
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ASTROCHEMISTRY AND INTERSTELLAR MOLECULES [PDF]
Publications of The Korean Astronomical Society, 2010 Astrochemistry provides powerful tools to understand various cosmic phenomena, including those in our solar system to the large-scale structure of the universe. In addition, the chemical property of an astronomical body is a crucial factor which governs the evolution of the system. Recent progress in astrophysical theories, computational modelings, and
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Regarding the Detection of Interstellar C4 and C5 Molecules
The Astrophysical JournalAnalysis of very high signal-to-noise ratio (S/N) spectra of reddened stars allowed us to determine an upper limit (UL) of the column density N (C _4 ).
G. A. Galazutdinov +2 more
doaj +1 more source
Scientific returns from a program of space missions to comets [PDF]
A program of cometary missions is proposed. The nature and size of interstellar dust, its origin and evolution; identification of new interstellar molecules; clarification of interstellar chemistry; accretion of grains into protosolar cometesimals; role ...
Delsemme, A. H.
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Molecules in interstellar space [PDF]
Science, 2019 Astrochemistry Chemistry in space occurs wherever gas is dense and cool enough for chemical bonds to form, producing a wide variety of molecules. These are particularly common in the gas clouds that provide the raw material for star and planet formation. McGuire has cataloged all molecules detected in the interstellar and circumstellar medium.
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The Astrophysical JournalOxygen-containing complex organic molecules are key precursors to biorelevant compounds fundamental for the origins of life. However, the untangling of their interstellar formation mechanisms has just scratched the surface, especially for oxygen ...
Jia Wang +3 more
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Interstellar Molecules in Meteorites [PDF]
Symposium - International Astronomical Union, 1989 Substantial enrichment of deuterium, D, in certain components of chondritic meteorites is interpreted as a record of isotopic fractionation during ion-molecule reactions at the very low temperatures characteristic of dense interstellar clouds. Whether those meteorites still contain the actual molecules that were synthesised in the presolar interstellar
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