Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations
文献类型：期刊论文
| 作者 | Hajra,Rajkumar7; Tsurutani,Bruce T.6; Lakhina,Gurbax S.5; Lu,Quanming4,7; Du,Aimin2,3; Shan,Lican1,2 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 951期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/acd370 |
| 英文摘要 | Abstract The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ～0.3 and 1.0 au from the Sun. With increasing heliocentric distance (r h), the plasma speed is found to increase at ～34–40 km s?1 au?1 and the density exhibits a sharper fall ( r h ? 2 ) compared to the magnetic field magnitude ( r h ? 1.5 ) and the temperature ( r h ? 0.8 ). Using all available solar wind plasma and magnetic field measurements, we identified 68 and 39 fast interplanetary shocks encountered by H1 and H2, respectively. The overwhelming majority (85%) of the shocks are found to be driven by interplanetary coronal mass ejections (ICMEs). While the two spacecraft encountered more than 73 solar wind high-speed streams (HSSs), only ～22% had shocks at the boundaries of corotating interaction regions (CIRs) formed by the HSSs. All of the ICME shocks were found to be fast forward (FF) shocks; only four of the CIR shocks were fast reverse shocks. Among all ICME FF shocks (CIR FF shocks), 60% (75%) are quasi-perpendicular with shock normal angles (θ Bn) ≥ 45° relative to the upstream ambient magnetic field, and 40% (25%) are quasi-parallel (θ Bn < 45°). No radial dependences were found in FF shock normal angle and speed. The FF shock Mach number (M ms), magnetic field, and plasma compression ratios are found to increase with increasing r h at the rates of 0.72, 0.89, and 0.98 au?1, respectively. On average, ICME FF shocks are found to be considerably faster (～20%) and stronger (with ～28% higher M ms) than CIR FF shocks. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:APJ_951_1_75 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110549]  |
| 专题 | 地质与地球物理研究所_深部资源勘探装备研发 |
| 通讯作者 | Hajra,Rajkumar |
| 作者单位 | 1.Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, People's Republic of China 2.College of Earth and Planetary Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China 3.CAS Engineering Laboratory for Deep Resources Equipment and Technology, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People's Republic of China 4.CAS Center for Excellence in Comparative Planetology, Hefei, People's Republic of China 5.Indian Institute of Geomagnetism, Navi Mumbai, India 6.Retired, Pasadena, California, USA 7.CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, People's Republic of China; rajkumarhajra@yahoo.co.in, rhajra@ustc.edu.cn |
| 推荐引用方式 GB/T 7714 | Hajra,Rajkumar,Tsurutani,Bruce T.,Lakhina,Gurbax S.,et al. Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations[J]. The Astrophysical Journal,2023,951(1). |
| APA | Hajra,Rajkumar,Tsurutani,Bruce T.,Lakhina,Gurbax S.,Lu,Quanming,Du,Aimin,&Shan,Lican.(2023).Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations.The Astrophysical Journal,951(1). |
| MLA | Hajra,Rajkumar,et al."Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations".The Astrophysical Journal 951.1(2023). |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。