Comparative Study of Electric Currents and Energetic Particle Fluxes in a Solar Flare and Earth Magnetospheric Substorm

被引：6

作者：

Artemyev, Anton ^{[1
,2
,3
]}

Zimovets, Ivan ^{[3
]}

Sharykin, Ivan ^{[3
]}

Nishimura, Yukitoshi ^{[4
,5
]}

Downs, Cooper ^{[6
]}

Weygand, James ^{[1
,2
]}

Fiori, Robyn ^{[7
]}

Zhang, Xiao-Jia ^{[1
,2
]}

Runov, Andrei ^{[1
,2
]}

Velli, Marco ^{[1
,2
]}

Angelopoulos, Vassilis ^{[1
,2
]}

Panasenco, Olga ^{[8
]}

Russell, Christopher T. ^{[1
,2
]}

Miyoshi, Yoshizumi ^{[9
]}

Kasahara, Satoshi ^{[10
]}

Matsuoka, Ayako ^{[11
]}

Yokota, Shoichiro ^{[12
]}

Keika, Kunihiro ^{[10
]}

Hori, Tomoaki ^{[9
]}

Kazama, Yoichi ^{[13
]}

Wang, Shiang-Yu ^{[13
]}

Shinohara, Iku ^{[14
]}

Ogawa, Yasunobu ^{[15
]}

机构：

[1] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA

[2] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA

[3] RAS, Space Res Inst, Moscow 117997, Russia

[4] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA

[5] Boston Univ, Ctr Space Sci, Boston, MA 02215 USA

[6] Predict Sci Inc, San Diego, CA 92121 USA

[7] Nat Resources Canada, Canadian Hazards Informat Serv, Ottawa, ON K1A 0E4, Canada

[8] Adv Heliophys, Pasadena, CA 91106 USA

[9] Nagoya Univ, ISEE, Nagoya, Aichi 4648601, Japan

[10] Univ Tokyo, Sch Sci, Dept Earth & Planetary Sci, Tokyo 1138654, Japan

[11] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2525210, Japan

[12] Osaka Univ, Machikaneyama Cho, Toyonaka, Osaka 5600043, Japan

[13] Acad Sinica, Inst Astron & Astrophys, 1 Sec Roosevelt Rd, Taipei 10617, Taiwan

[14] JAXA, ISAS, Sagamihara, Kanagawa 2520222, Japan

[15] Natl Inst Polar Res, Tokyo 1908518, Japan

来源：

ASTROPHYSICAL JOURNAL | 2021年 / 923卷 / 02期

基金：

俄罗斯科学基金会; 日本学术振兴会;

关键词：

CORONAL MAGNETIC-FIELD; KINETIC ALFVEN WAVES; OF-FLIGHT DISTANCES; DIPOLARIZATION FRONTS; ACTIVE-REGION; MAGNETOMETER ARRAY; MICROWAVE EMISSION; CURRENT SHEETS; PLASMA SHEET; ACCELERATION;

D O I：

10.3847/1538-4357/ac2dfc

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Magnetic field line reconnection is a universal plasma process responsible for the conversion of magnetic field energy to plasma heating and charged particle acceleration. Solar flares and Earth's magnetospheric substorms are two of the most investigated dynamical systems where global magnetic field reconfiguration is accompanied by energization of plasma populations. Such a reconfiguration includes formation of a long-living current system connecting the primary energy release region and cold dense conductive plasma of the photosphere/ionosphere. In both flares and substorms the evolution of this current system correlates with the formation and dynamics of energetic particle fluxes (although energy ranges can be different for these systems). Our study is focused on the similarity between flares and substorms. Using a wide range of data sets available for flare and substorm investigations, we qualitatively compare the dynamics of currents and energetic particle fluxes for one flare and one substorm. We show that there is a clear correlation between energetic particle precipitations (associated with energy release due to magnetic reconnection seen from riometer and hard X-ray measurements) and magnetic field reconfiguration/formation of the current system, whereas the long-term current system evolution correlates better with hot plasma fluxes (seen from in situ and soft X-ray measurements). We then discuss how data sets of in situ measurements of magnetospheric substorms can help interpret solar flare data.

引用

页数：21

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