Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075915 |
Ecliptic North-South Symmetry of Hydrogen Geocorona | |
Kameda, S.1; Ikezawa, S.1; Sato, M.1; Kuwabara, M.2; Osada, N.1; Murakami, G.3; Yoshioka, K.4; Yoshikawa, I.2; Taguchi, M.1; Funase, R.5; Sugita, S.4,6; Miyoshi, Y.7; Fujimoto, M.3 | |
2017-12-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | The hydrogen exosphere constitutes the uppermost atmospheric layer of the Earth, and its shape may reflect the last stage of the atmospheric escape process. The distribution of hydrogen in the outer exosphere remains unobserved because outer geocoronal emissions are difficult to observe from within the exosphere. In this study, we used the Lyman Alpha Imaging Camera on board the Proximate Object Close Flyby with Optical Navigation spacecraft, located outside the exosphere, to obtain the first image of the entire geocorona that extends to more than 38 Earth radii. The observed emission intensity distribution can be reproduced using our analytical model that has three parameters: exobase temperature, exobase density, and solar radiation pressure, which implies that hot hydrogen production in the magnetized plasmasphere is not the dominant process shaping the outer hydrogen exosphere. However, the role of the magnetic effect in determining the total escape flux cannot be ruled out. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102400002 |
WOS关键词 | SOLAR MINIMUM ; DENSITY DISTRIBUTIONS ; RADIATION PRESSURE ; ATOMIC-HYDROGEN ; EXOSPHERE |
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/29133 |
专题 | 气候变化 |
作者单位 | 1.Rikkyo Univ, Coll Sci, Dept Phys, Tokyo, Japan; 2.Univ Tokyo, Dept Complex Sci & Engn, Chiba, Japan; 3.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Japan; 4.Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan; 5.Univ Tokyo, Dept Aeronaut & Astronaut, Tokyo, Japan; 6.Univ Tokyo, Res Ctr Early Universe, Tokyo, Japan; 7.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan |
推荐引用方式 GB/T 7714 | Kameda, S.,Ikezawa, S.,Sato, M.,et al. Ecliptic North-South Symmetry of Hydrogen Geocorona[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(23). |
APA | Kameda, S..,Ikezawa, S..,Sato, M..,Kuwabara, M..,Osada, N..,...&Fujimoto, M..(2017).Ecliptic North-South Symmetry of Hydrogen Geocorona.GEOPHYSICAL RESEARCH LETTERS,44(23). |
MLA | Kameda, S.,et al."Ecliptic North-South Symmetry of Hydrogen Geocorona".GEOPHYSICAL RESEARCH LETTERS 44.23(2017). |
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