Dynamics of planetary ions in the induced magnetospheres of Venus and Mars

Jarvinen R.; Brain D. A.; Luhmann J. G.

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Dynamics of planetary ions in the induced magnetospheres of Venus and Mars

机译：金星和火星感应磁层中行星离子的动力学

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We compare dynamics of planetary ions in the induced magnetospheres of Venus and Mars in a global hybrid simulation to study factors controlling the ion escape at unmagnetized planets. In the simulation we find that the finite Larmor radius (FLR) effects of escaping heavy ions are stronger at Mars than Venus under nominal solar wind conditions. But, varying upstream conditions, especially the IMF, affects the strength of the FLR effects. We classify three basic types of planetary ion dynamics in an induced magnetosphere. First, light ions such as hydrogen follow the E x B drift, and escape in the wake in the hemisphere where the solar wind convection electric field is pointing towards the planet. Second, heavy ions like oxygen undergo FLR effects, and escape mainly outside of the wake in the hemisphere where the solar wind convection electric field is pointing away from the planet. Third, ion species between light and heavy ions can have both the E x B and FLR type dynamics in the same time. (C) 2015 Elsevier Ltd. All rights reserved.

机译：我们在全球混合模拟中比较了金星和火星感应磁层中行星离子的动力学，以研究控制未磁化行星上离子逸出的因素。在模拟中，我们发现在正常的太阳风条件下，火星上逃逸重离子的有限拉莫半径（FLR）效应要比金星强。但是，变化的上游条件，尤其是IMF，会影响FLR效应的强度。我们将感应磁层中的行星离子动力学分为三种基本类型。首先，诸如氢之类的轻离子跟随E x B漂移，并在太阳风对流电场指向地球的半球尾迹中逸出。其次，像氧气这样的重离子会受到FLR的影响，并且主要逃逸到太阳风对流电场指向远离行星的半球尾流之外。第三，轻离子和重离子之间的离子种类可以同时具有E x B和FLR型动力学。（C）2015 Elsevier Ltd.保留所有权利。

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《Planetary and space science》 |2016年第8期|1-14|共14页
作者
Jarvinen R.; Brain D. A.; Luhmann J. G.;
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作者单位

Finnish Meteorol Inst, FIN-00101 Helsinki, Finland|Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA;

Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA;

Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA;

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正文语种 eng
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关键词
Mars; Venus; Solar wind; Ion escape;

机译：火星;金星;太阳风;离子逃逸;

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1. Magnetized Mars: Transformation Of Earth-like Magnetosphere Tovenus-like Induced Magnetosphere [J] . E. Kallio, S. Barabash, P. Janhunen, Planetary and space science . 2008,第6期

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2. The Induced Magnetospheres of Mars, Venus, and Titan [J] . C. Bertucci, F. Duru, N. Edberg, Space Science Reviews . 2011,第1a4期

机译：火星，金星和土卫六的磁层
3. The induced magnetospheres of mars, venus, and titan [J] . Bertucci C., Duru F., Edberg N., Space Science Reviews . 2011,第1a4期

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4. The Induced Magnetospheres of Mars, Venus, and Titan [C] . C. Bertucci, F. Duru, N. Edberg, The plasma environment of Venus, Mars, and Titan . 2009

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7. Modeling the response of the induced magnetosphere of Venus to changing IMF direction using MESSENGER and Venus Express observations [O] . Benna, Mehdi, Acuña, Mario H., Anderson, Brian J., 2009

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Dynamics of planetary ions in the induced magnetospheres of Venus and Mars

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