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Accession Number
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N20120010636
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Title
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Ice Line in Pre-Solar Protoplanetary Disks.
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Publication Date
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Mar 2012
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Media Count
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14p
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Personal Author
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S. S. Davis
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Abstract
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Protoplanetary disks contain abundant quantities of water molecules in both gas and solid phases. The distribution of these two phases in an evolving protoplanetary disk will have important consequences regarding water sequestration in planetary embryos. The boundary between gaseous and solid water is the 'ice line' or 'snow line'. A simplified model that captures the complicated two-branched structure of the ice line is developed and compared with recent investigations. The effect of an evolving Sun is also included for the first time. This latter parameter could have important consequences regarding the thermodynamic state and the surface reaction environment for the time-dependent chemical reactions occurring during the 1- to 10-million-year lifetime of the pre-solar disk.
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Keywords
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Chemical reactions
Ice
Molecules
Protoplanetary disks
Solid phases
Sun
Surface reactions
Thermodynamics
Time dependence
Vapor phases
Water
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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54 - Astronomy & Astrophysics
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Corporate Author
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National Aeronautics and Space Administration, Moffett Field, CA. Ames Research Center.
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Document Type
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Journal article
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Title Note
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N/A
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NTIS Issue Number
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1226
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Contract Number
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N/A
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