Results 151 to 160 of about 35,391 (195)
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Journal of Molecular Evolution, 1974
The study of interstellar molecules broadly includes two areas of interest. One area uses the unique ability of molecules to act as probes of the physical conditions in the cold, dense, visually opaque component of the interstellar medium. The physical properties of this and other components of the interstellar medium are summarized.
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The study of interstellar molecules broadly includes two areas of interest. One area uses the unique ability of molecules to act as probes of the physical conditions in the cold, dense, visually opaque component of the interstellar medium. The physical properties of this and other components of the interstellar medium are summarized.
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Complex Organic Interstellar Molecules
Annual Review of Astronomy and Astrophysics, 2009Of the over 150 different molecular species detected in the interstellar and circumstellar media, approximately 50 contain 6 or more atoms. These molecules, labeled complex by astronomers if not by chemists, all contain the element carbon and so can be called organic. In the interstellar medium, complex molecules are detected in the denser sources only.
Herbst, E., Van Dishoeck, E.
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Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1987
Some 70 different molecular species have so far been detected variously in diffuse interstellar clouds, dense interstellar clouds and circumstellar shells. Only simple (diatomic and triatomic) species exist in diffuse clouds because of the penetration of destructive ultraviolet radiations, whereas more complex (polyatomic) molecules survive in dense ...
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Some 70 different molecular species have so far been detected variously in diffuse interstellar clouds, dense interstellar clouds and circumstellar shells. Only simple (diatomic and triatomic) species exist in diffuse clouds because of the penetration of destructive ultraviolet radiations, whereas more complex (polyatomic) molecules survive in dense ...
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Astrophysics and Space Science, 1977
We propose that photocycloaddition reactions in molecular complexes in normal interstellar clouds will create unusually large molecules. These may be sufficiently radiation stable to be circulated with the interstellar gas, and so provide convenient nucleation centres for growth of loosely bound grains in dark regions.
T. J. Millar, D. A. Williams
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We propose that photocycloaddition reactions in molecular complexes in normal interstellar clouds will create unusually large molecules. These may be sufficiently radiation stable to be circulated with the interstellar gas, and so provide convenient nucleation centres for growth of loosely bound grains in dark regions.
T. J. Millar, D. A. Williams
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Interstellar Molecules and Dense Clouds
Science, 1971Current knowledge of the interstellar medium is discussed on the basis of recent published studies. The subjects considered include optical identification of interstellar molecules, radio molecular lines, interstellar clouds, isotopic abundances, formation and disappearance of interstellar molecules, and interstellar probing techniques.
D M, Rank, C H, Townes, W J, Welch
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A new interstellar molecule: triearbon monoxide
Nature, 1984The published version is located at http://www.nature.com/nature/journal/v310/n5973/abs/310125a0 ...
MATTHEWS, HE +4 more
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Interstellar molecule reactions
Reviews of Modern Physics, 1976Considerable progress has been made during the past five years toward a quantitative understanding of the formation and destruction processes for interstellar molecules. Two areas have been most successful---investigations of the formation process for molecular hydrogen on the surfaces of dust grains and studies of reactions involving positive ions in ...
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Molecules in Interstellar Clouds
1981The physical and chemical state of interstellar clouds is reviewed, including recent investigations at the Onsala Space Observatory. The Orion A region is chosen as an example of a “giant” molecular cloud and hence a formation site for massive stars. The Taurus Molecular Clouds, in contrast, may be the future birthplace of solar-type stars.
Irvine, William M. +2 more
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Interstellar Molecules and Interstellar Chemistry
1986Radio astronomers have to date detected some 60 or so molecules in interstellar space. These molecules have been identified, in the majority of cases, by recording the microwave spectrum received by radio telescope from an interstellar or circumstellar dust cloud and comparing it with the spectra produced in laboratory experiments.
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