A Comparative Study of the Proton Properties of Magnetospheric Substorms at Earth and Mercury in the Near Magnetotail
文献类型：期刊论文
| 作者 | Sun, W. J.1,2,3,4; Slavin, J. A.2; Dewey, R. M.2; Raines, J. M.2; Fu, S. Y.3; Wei, Y.1; Karlsson, T.5; Poh, G. K.2; Jia, X.2; Gershman, D. J.6 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2018-08-28 |
| 卷号 | 45期号:16页码:7933-7941 |
| ISSN号 | 0094-8276 |
| 关键词 | comparative planetary study magnetospheric substorm proton heating adiabatic and nonadiabatic processes kappa distribution |
| DOI | 10.1029/2018GL079181 |
| 英文摘要 | The variations of plasma sheet proton properties during magnetospheric substorms at Earth and Mercury are comparatively studied. This study utilizes kappa distributions to interpret proton properties at both planets. Proton number densities are found to be around an order of magnitude higher, temperatures several times smaller, and kappa values broader at Mercury than at Earth. Protons become denser and cooler during the growth phase, and are depleted and heated after the dipolarizations in both magnetospheres. The changes of kappa at Earth are generally small (<20%), indicating that spectrum-preserving processes, like adiabatic betatron acceleration, play an important role there, while variations of kappa at Mercury are large (>60%), indicating the importance of spectrum-altering processes there, such as acceleration due to nonadiabatic cross-tail particle motions and wave-particle interactions. This comparative study reveals important intrinsic properties on the energization of protons in both magnetospheres. Plain Language Summary Earth and Mercury are the only two planets possessing global intrinsic magnetic fields among the four inner planets, which are Mercury, Venus, Earth, and Mars, within the solar system. The interactions between the intrinsic magnetic fields and the continual flow of high-speed solar wind from the Sun form similar magnetospheres at the two planets, although the scale of the magnetosphere is much smaller at Mercury than at Earth. Magnetospheric substorms, a result of solar wind-magnetosphere coupling, occur in both magnetospheres. Comparative study of a similar process between different planets is meaningful as it can help us in understanding the specific process further as well as help us in understanding the intrinsic properties of the magnetospheres. This research paper characterizes the proton properties of magnetospheric substorms of both planets, revealing that different mechanisms control the behavior of protons during the magnetospheric substorms of the two planets. |
| WOS关键词 | MESSENGER OBSERVATIONS ; PLASMA SHEET ; MAGNETIC-FIELD ; SPECTRAL CHARACTERISTICS ; KAPPA-DISTRIBUTIONS ; ION ; PARTICLE ; TAIL ; ACCELERATION ; MAGNETOMETER |
| 资助项目 | NASA Discovery Program[NASW-00002] ; NASA Discovery Program[NAS597271] ; NASA[NAS502099] ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)[50 OC 0302] ; National Postdoctoral Program for Innovative Talents[BX201600158] ; China Postdoctoral Science Foundation[2016M600124] ; National Natural Science Foundation of China[41704163] ; National Natural Science Foundation of China[41525016] ; National Natural Science Foundation of China[41474155] ; National Natural Science Foundation of China[41474139] ; National Natural Science Foundation of China[41661164034] ; Thousand Young Talents Program of China ; NASA Heliophysics Supporting Research program[NNX15AJ68G] ; NASA Living With a Star program[NNX16AJ67G] ; NASA's Discovery Data Analysis Program[NNX16AJO5G] ; CAS Key Laboratory of Lunar and Deep Space Exploration[2013DP173157] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000445612500006 |
| 资助机构 | NASA Discovery Program ; NASA Discovery Program ; NASA ; NASA ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR) ; German Center for Aviation and Space (DLR) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; NASA Heliophysics Supporting Research program ; NASA Heliophysics Supporting Research program ; NASA Living With a Star program ; NASA Living With a Star program ; NASA's Discovery Data Analysis Program ; NASA's Discovery Data Analysis Program ; CAS Key Laboratory of Lunar and Deep Space Exploration ; CAS Key Laboratory of Lunar and Deep Space Exploration ; NASA Discovery Program ; NASA Discovery Program ; NASA ; NASA ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR) ; German Center for Aviation and Space (DLR) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; NASA Heliophysics Supporting Research program ; NASA Heliophysics Supporting Research program ; NASA Living With a Star program ; NASA Living With a Star program ; NASA's Discovery Data Analysis Program ; NASA's Discovery Data Analysis Program ; CAS Key Laboratory of Lunar and Deep Space Exploration ; CAS Key Laboratory of Lunar and Deep Space Exploration ; NASA Discovery Program ; NASA Discovery Program ; NASA ; NASA ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR) ; German Center for Aviation and Space (DLR) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; NASA Heliophysics Supporting Research program ; NASA Heliophysics Supporting Research program ; NASA Living With a Star program ; NASA Living With a Star program ; NASA's Discovery Data Analysis Program ; NASA's Discovery Data Analysis Program ; CAS Key Laboratory of Lunar and Deep Space Exploration ; CAS Key Laboratory of Lunar and Deep Space Exploration ; NASA Discovery Program ; NASA Discovery Program ; NASA ; NASA ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR) ; German Center for Aviation and Space (DLR) ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; NASA Heliophysics Supporting Research program ; NASA Heliophysics Supporting Research program ; NASA Living With a Star program ; NASA Living With a Star program ; NASA's Discovery Data Analysis Program ; NASA's Discovery Data Analysis Program ; CAS Key Laboratory of Lunar and Deep Space Exploration ; CAS Key Laboratory of Lunar and Deep Space Exploration |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/22893]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Sun, W. J. |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA 3.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Key Lab Lunar & Deep Space Explorat, Natl Astron Observ, Beijing, Peoples R China 5.KTH Royal Inst Technol, Sch Elect Engn & Comp Sci, Space & Plasma Phys, Stockholm, Sweden 6.NASA, Geospace Phys Lab, Goddard Space Flight Ctr, Greenbelt, MD USA 7.Shandong Univ, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, W. J.,Slavin, J. A.,Dewey, R. M.,et al. A Comparative Study of the Proton Properties of Magnetospheric Substorms at Earth and Mercury in the Near Magnetotail[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):7933-7941. |
| APA | Sun, W. J..,Slavin, J. A..,Dewey, R. M..,Raines, J. M..,Fu, S. Y..,...&Zhao, D..(2018).A Comparative Study of the Proton Properties of Magnetospheric Substorms at Earth and Mercury in the Near Magnetotail.GEOPHYSICAL RESEARCH LETTERS,45(16),7933-7941. |
| MLA | Sun, W. J.,et al."A Comparative Study of the Proton Properties of Magnetospheric Substorms at Earth and Mercury in the Near Magnetotail".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):7933-7941. |
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来源：国家天文台
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