Observations of an interplanetary switch-on shock driven by a magnetic cloud
文献类型：期刊论文
| 作者 | Feng, H. Q.1,4; Lin, C. C.2; Chao, J. K.2; Wu, D. J.3; Lyu, L. H.2; Lee, L. C.2 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2009-04-11 |
| 卷号 | 36页码:L07106 |
| 关键词 | RANKINE-HUGONIOT PROBLEM QUASI-PARALLEL BOW SHOCK CYLINDER WIND FLOW |
| ISSN号 | 0094-8276 |
| 英文摘要 | A possible interplanetary switch-on shock event prior to a trailing magnetic cloud was observed on August 1, 2002 at 1 AU. We fit the data with the Rankine-Hugoniot (R-H) relations based on both oblique and switch-on shock models. It is found that both models are consistent with the observed data, and the best fit solutions of the two models are close to one another. For the oblique shock model, the best fit upstream shock normal angle, theta(BN1) (= cos(-1) (B(t1)/B(t1))), is as small as 5.55 degrees. The shock has the following characteristics: (1) plasma density, plasma temperature, and the magnetic field strength all increase across the shock, (2) protons are thermalized very efficiently across the shock, but it is not the case for electrons, (3) the fast-mode Mach number is greater than unity in the preshock region and less than unity in the postshock region, and (4) from the oblique shock model we find that the normal Alfven Mach number is very close to unity in the postshock region, while from the switch-on shock model we obtain a solution of unity normal Alfven Mach number. Our results clearly demonstrate the MHD character of a fast shock propagating along the ambient magnetic field. Citation: Feng, H. Q., C. C. Lin, J. K. Chao, D. J. Wu, L. H. Lyu, and L. C. Lee (2009), Observations of an interplanetary switch- on shock driven by a magnetic cloud, Geophys. Res. Lett., 36, L07106, doi: 10.1029/2009GL037354. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Geology |
| 类目[WOS] | Geosciences, Multidisciplinary |
| 研究领域[WOS] | Geology |
| 关键词[WOS] | RANKINE-HUGONIOT PROBLEM ; QUASI-PARALLEL ; BOW SHOCK ; CYLINDER ; WIND ; FLOW |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000265101500004 |
| 公开日期 | 2011-12-08 |
| 源URL | [http://159.226.72.40/handle/332002/1517]  |
| 专题 | 紫金山天文台_太阳和太阳系等离子体研究团组 |
| 作者单位 | 1.Luoyang Normal Univ, Coll Phys & Elect Sci, Luoyang 471002, Peoples R China 2.Natl Cent Univ, Inst Space Sci, Jhongli 320, Taiwan 3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 4.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, H. Q.,Lin, C. C.,Chao, J. K.,et al. Observations of an interplanetary switch-on shock driven by a magnetic cloud[J]. GEOPHYSICAL RESEARCH LETTERS,2009,36:L07106. |
| APA | Feng, H. Q.,Lin, C. C.,Chao, J. K.,Wu, D. J.,Lyu, L. H.,&Lee, L. C..(2009).Observations of an interplanetary switch-on shock driven by a magnetic cloud.GEOPHYSICAL RESEARCH LETTERS,36,L07106. |
| MLA | Feng, H. Q.,et al."Observations of an interplanetary switch-on shock driven by a magnetic cloud".GEOPHYSICAL RESEARCH LETTERS 36(2009):L07106. |
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来源：紫金山天文台
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