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  • 1
    Electronic Resource
    Electronic Resource
    Gas-grain processes in the envelopes of late-type stars (1995)
    Springer
    Astrophysics and space science 224 (1995), S. 439-440 
    Details
    ISSN: 1572-946X
    Keywords: stars: late-type ; stars: circumstellar matter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some results from studies of the gas-grain chemistry in oxygen-rich circumstellar envelopes (CSEs) are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00667894
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    Paper (German National Licenses)
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  • 2
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    On the molecular complexity of the hot cores in Orion A - Grain surface chemistry as 'The last refuge of the scoundrel' (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: We have modeled the gas phase chemistry of warm molecular material around protostars that is seeded with evaporating grain mantles. We show that the release of simple molecules into the gas drives ion-molecule and neutral chemistries which can account for many of the complex O-bearing and N-bearing molecules observed in hot cores. Initial grain mantle components and secondary product molecules are identified, and the observational consequences are discussed.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 399; 1; p. L71-L74.
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The formation of oxygen-containing organic molecules in the Orion compact ridge (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Following a suggestion of Blake et al. (1987), an attempt was made to account for the unusually large abundances of selected oxygen-containing organic molecules in the so-called 'compact ridge' source directed toward Orion KL by a gas-phase chemical model in which large amounts of water are injected into the source from the IRc2 outflow. Although quantitative model results show that the calculated abundances of methanol, methyl formate, and dimethyl ether can be enhanced relative to their values in the absence of water injection, the enhancements fall far short of explaining the very large observed abundances of these species. Models in which methanol is injected rather than water are more successful, although the source of the methanol is unclear.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 369; 147-156
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Chemical models of interstellar gas-grain processes. II - The effect of grain-catalysed methane on gas phase evolution (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The effects on gas phase chemistry which result from the continuous desorption of methane molecules from grain surfaces are studied. Significant and sustained enhancements in the abundances of several complex hydrocarbon molecules are found, in good agreement with their observed values in TMC-1. The overall agreement is, however, just as good for the case of zero CH4 desorption efficiency. It is thus impossible to determine from the models whether or not the grain-surface production of methane is responsible for the observed abundances of some hydrocarbon molecules.
    Keywords: ASTROPHYSICS
    Type: Royal Astronomical Society, Monthly Notices (ISSN 0035-8711); 249; 69-75
    Format: text
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    NASA TECHNICAL REPORTS
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