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THE VARIABILITY OF HCN IN TITAN’S UPPER ATMOSPHERE AS IMPLIED BY THE CASSINI ION-NEUTRAL MASS SPECTROMETER MEASUREMENTS
Cui,J.1,2; Cao,Y.-T.1; Lavvas,P. P.3; Koskinen,and T. T.4
2016-07-13
Source PublicationThe Astrophysical Journal Letters
ISSN2041-8205
Volume826Issue:1
AbstractABSTRACT HCN is an important constituent in Titan’s upper atmosphere, serving as the main coolant in the local energy budget. In this study, we derive the HCN abundance at the altitude range of 960–1400 km, combining the Ion-Neutral Mass Spectrometer data acquired during a large number of Cassini flybys with Titan. Typically, the HCN abundance declines modestly with increasing altitude and flattens to a near constant level above 1200 km. The data reveal a tendency for dayside depletion of HCN, which is clearly visible below 1000 km but weakens with increasing altitude. Despite the absence of convincing anti-correlation between HCN volume mixing ratio and neutral temperature, we argue that the variability in HCN abundance makes an important contribution to the large temperature variability observed in Titan’s upper atmosphere.
Keywordplanets and satellites: atmospheres planets and satellites: individual (Titan)
DOI10.3847/2041-8205/826/1/L5
Language英语
WOS IDIOP:2041-8205-826-1-L5
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36322
Collection中国科学院国家天文台
Affiliation1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
2.Lunar and Planetary Science Laboratory, Macau University of Science and Technology, Macau, China
3.Groupe de Spectroscopie Moleculaire et Atmospherique, Universite de Reims, Champagne-Ardenne, CNRS UMR F-7331, France
4.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Cui,J.,Cao,Y.-T.,Lavvas,P. P.,等. THE VARIABILITY OF HCN IN TITAN’S UPPER ATMOSPHERE AS IMPLIED BY THE CASSINI ION-NEUTRAL MASS SPECTROMETER MEASUREMENTS[J]. The Astrophysical Journal Letters,2016,826(1).
APA Cui,J.,Cao,Y.-T.,Lavvas,P. P.,&Koskinen,and T. T..(2016).THE VARIABILITY OF HCN IN TITAN’S UPPER ATMOSPHERE AS IMPLIED BY THE CASSINI ION-NEUTRAL MASS SPECTROMETER MEASUREMENTS.The Astrophysical Journal Letters,826(1).
MLA Cui,J.,et al."THE VARIABILITY OF HCN IN TITAN’S UPPER ATMOSPHERE AS IMPLIED BY THE CASSINI ION-NEUTRAL MASS SPECTROMETER MEASUREMENTS".The Astrophysical Journal Letters 826.1(2016).
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