Document Detail

The Cassini UVIS stellar probe of the Titan atmosphere.
MedLine Citation:
PMID:  15890872     Owner:  NLM     Status:  MEDLINE    
The Cassini Ultraviolet Imaging Spectrometer (UVIS) observed the extinction of photons from two stars by the atmosphere of Titan during the Titan flyby. Six species were identified and measured: methane, acetylene, ethylene, ethane, diacetylene, and hydrogen cyanide. The observations cover altitudes from 450 to 1600 kilometers above the surface. A mesopause is inferred from extraction of the temperature structure of methane, located at 615 km with a temperature minimum of 114 kelvin. The asymptotic kinetic temperature at the top of the atmosphere determined from this experiment is 151 kelvin. The higher order hydrocarbons and hydrogen cyanide peak sharply in abundance and are undetectable below altitudes ranging from 750 to 600 km, leaving methane as the only identifiable carbonaceous molecule in this experiment below 600 km.
Donald E Shemansky; A Ian F Stewart; Robert A West; Larry W Esposito; Janet T Hallett; Xianming Liu
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  308     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-05-13     Completed Date:  2005-05-24     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  978-82     Citation Subset:  IM    
Department of Aerospace Engineering, University of Southern California, University Park, Los Angeles, CA 90089, USA.
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MeSH Terms
Extraterrestrial Environment
Hydrocarbons, Acyclic*
Hydrogen Cyanide*
Spectrum Analysis
Reg. No./Substance:
0/Ethylenes; 0/Hydrocarbons, Acyclic; 74-82-8/Methane; 74-84-0/Ethane; 74-85-1/ethylene; 74-86-2/Acetylene; 74-90-8/Hydrogen Cyanide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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