Publication Date:
1999-02-26
Description:
Chemistry resulting in the formation of large carbon-bearing molecules and dust in the interior of an expanding supernova was explored, and the equations governing their abundances were solved numerically. Carbon dust condenses from initially gaseous carbon and oxygen atoms because energetic electrons produced by radioactivity in the supernova cause dissociation of the carbon monoxide molecules, which would otherwise form and limit the supply of carbon atoms. The resulting free carbon atoms enable carbon dust to grow faster by carbon association than the rate at which the dust can be destroyed by oxidation. The origin of presolar micrometer-sized carbon solids that are found in meteorites is thereby altered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, D D -- Liu, W -- Dalgarno, A -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1290-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-1911, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10037591" target="_blank"〉PubMed〈/a〉
Keywords:
Astronomical Phenomena
;
*Astronomy
;
Carbon/*chemistry
;
Carbon Monoxide/chemistry
;
Cosmic Dust
;
Mathematics
;
Meteoroids
;
Models, Chemical
;
Oxygen/chemistry
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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