Anomalous Response of Mercury’s Magnetosphere to Solar Wind Compression: Comparison to Earth
文献类型：期刊论文
| 作者 | Chen,Yu-Wei2; Shue,Jih-Hong2; Zhong,Jun3; Shen,Han-Wen1,2 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2023-10-23 |
| 卷号 | 957期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/acf655 |
| 英文摘要 | Abstract Magnetic field intensity increases when solar wind compresses a planet’s magnetosphere. The compression can be measured using the ratio of compressed magnetic fields to purely dipolar magnetic fields just inside the magnetopause. For Earth, the ratio is proportional to the subsolar standoff distance of the magnetopause. Data from in-orbit observations by the MESSENGER spacecraft indicate an opposite ratio for Mercury; the compression ratio is inversely proportional to the subsolar standoff distance. The additional magnetic fields induced by currents at the top of Mercury’s core enhance the total magnetic field strength. We also evaluated differences in the subsolar standoff of Mercury’s magnetopause according to the north–south polarity of the interplanetary magnetic field (IMF). Previous studies have not identified meaningful differences in subsolar standoff distance between those in northward versus southward IMF polarities for Mercury; however, we found that the difference is statistically significant at a large IMF B Z (15–20 nT). The magnetic reconnection that occurs behind the cusp for a large northward IMF transfers the magnetic flux to the dayside and increases the subsolar standoff distance. The eroded magnetic flux for a large southward IMF is compensated by the induced magnetic fields. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:APJ_957_1_26 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110681]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Shue,Jih-Hong |
| 作者单位 | 1.Department of Physics and Astronomy, University of Iowa, Iowa City, IA, USA 2.Department of Space Science and Engineering, National Central University, Taoyuan, Taiwan; jhshue@jupiter.ss.ncu.edu.tw 3.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Chen,Yu-Wei,Shue,Jih-Hong,Zhong,Jun,et al. Anomalous Response of Mercury’s Magnetosphere to Solar Wind Compression: Comparison to Earth[J]. The Astrophysical Journal,2023,957(1). |
| APA | Chen,Yu-Wei,Shue,Jih-Hong,Zhong,Jun,&Shen,Han-Wen.(2023).Anomalous Response of Mercury’s Magnetosphere to Solar Wind Compression: Comparison to Earth.The Astrophysical Journal,957(1). |
| MLA | Chen,Yu-Wei,et al."Anomalous Response of Mercury’s Magnetosphere to Solar Wind Compression: Comparison to Earth".The Astrophysical Journal 957.1(2023). |
入库方式： OAI收割
来源：地质与地球物理研究所
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