Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078870 |
Enhanced Airglow Signature Observed at Titan in Response to its Fluctuating Magnetospheric Environment | |
Royer, E. M.1; Esposito, L. W.1; Crary, F.1; Wahlund, J. -E.2 | |
2018-09-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:17页码:8864-8870 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Sweden |
英文摘要 | On rare occasions Titan has been observed in the magnetosheath, where the solar wind interferes with the regular magnetic field generated by Saturn. This particular orbital position allows for a deeper investigation of Titan's upper atmosphere response to its highly energetic magnetospheric environment. Although solar extreme ultraviolet radiation is known to be the main source of ionization in Titan's upper atmosphere, magnetospheric particle precipitation can also account for about 10% of the ionization process. We are reporting here on ultraviolet observations of Titan airglow enhancements occurring while the spacecraft and Titan are known to have been exposed to the magnetosheath environment. Using remote sensing Cassini Ultraviolet Imaging Spectrograph observations of Titan in correlation with in situ Cassini Plasma Spectrometer measurements, we present evidence of Titan's upper atmosphere response to an electron burst crossing the magnetosheath at the time of the T32 flyby, on 13 June 2007. Plain Language Summary Most of the time, Titan is embedded in Saturn's magnetosphere. The solar wind pressure on Saturn's magnetic field defines the size of the magnetospheric envelop around the planet. On rare occasion, this pressure is strong enough to reduce the size of Saturn's magnetospheric envelop, leaving Titan outside of it. We have been observing Titan and its immediate environment during such a configuration. The compression of the magnetic envelop allows for Titan uppermost layer of its atmosphere to directly interact with solar wind particles. We are reporting here on an observation showing a strong and sudden brightening of the upper atmosphere of Titan correlated with simultaneous measurements of an increase in electron energy around the satellite. Using remote sensing Cassini Ultraviolet Imaging Spectrograph observations of Titan in correlation with in situ Cassini Plasma Spectrometer measurements, we present evidence of Titan's upper atmosphere response to an electron burst passing by the Saturn's system at the time of the T32 flyby, on 13 June 2007, providing a better understanding of how magnetospheric environment and planetary atmospheres interact together. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445727500019 |
WOS关键词 | CASSINI MAGNETOMETER OBSERVATIONS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28492 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, LASP, Boulder, CO 80309 USA; 2.Swedish Inst Space Phys, Uppsala, Sweden |
推荐引用方式 GB/T 7714 | Royer, E. M.,Esposito, L. W.,Crary, F.,et al. Enhanced Airglow Signature Observed at Titan in Response to its Fluctuating Magnetospheric Environment[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(17):8864-8870. |
APA | Royer, E. M.,Esposito, L. W.,Crary, F.,&Wahlund, J. -E..(2018).Enhanced Airglow Signature Observed at Titan in Response to its Fluctuating Magnetospheric Environment.GEOPHYSICAL RESEARCH LETTERS,45(17),8864-8870. |
MLA | Royer, E. M.,et al."Enhanced Airglow Signature Observed at Titan in Response to its Fluctuating Magnetospheric Environment".GEOPHYSICAL RESEARCH LETTERS 45.17(2018):8864-8870. |
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