Effects of Thomson-Scattering Geometry on White-Light Imaging of an Interplanetary Shock: Synthetic Observations from Forward Magnetohydrodynamic Modelling
文献类型：期刊论文
| 作者 | Xiong, Ming ; Davies, J. A.; Bisi, M. M.; Owens, M. J.; Fallows, R. A.; Dorrian, G. D.
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| 刊名 | SOLAR PHYSICS
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| 出版日期 | 2013 |
| 卷号 | 285期号:1-2页码:369-389 |
| 关键词 | White-light imaging Thomson scattering Polarisation brightness Interplanetary shock |
| ISSN号 | 0038-0938 |
| 通讯作者 | Xiong, M (reprint author), Aberystwyth Univ, Aberystwyth, Dyfed, Wales. |
| 英文摘要 | Stereoscopic white-light imaging of a large portion of the inner heliosphere has been used to track interplanetary coronal mass ejections. At large elongations from the Sun, the white-light brightness depends on both the local electron density and the efficiency of the Thomson-scattering process. To quantify the effects of the Thomson-scattering geometry, we study an interplanetary shock using forward magnetohydrodynamic simulation and synthetic white-light imaging. Identifiable as an inclined streak of enhanced brightness in a time-elongation map, the travelling shock can be readily imaged by an observer located within a wide range of longitudes in the ecliptic. Different parts of the shock front contribute to the imaged brightness pattern viewed by observers at different longitudes. Moreover, even for an observer located at a fixed longitude, a different part of the shock front will contribute to the imaged brightness at any given time. The observed brightness within each imaging pixel results from a weighted integral along its corresponding ray-path. It is possible to infer the longitudinal location of the shock from the brightness pattern in an optical sky map, based on the east-west asymmetry in its brightness and degree of polarisation. Therefore, measurement of the interplanetary polarised brightness could significantly reduce the ambiguity in performing three-dimensional reconstruction of local electron density from white-light imaging. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/5015]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Xiong, Ming,Davies, J. A.,Bisi, M. M.,et al. Effects of Thomson-Scattering Geometry on White-Light Imaging of an Interplanetary Shock: Synthetic Observations from Forward Magnetohydrodynamic Modelling[J]. SOLAR PHYSICS,2013,285(1-2):369-389. |
| APA | Xiong, Ming,Davies, J. A.,Bisi, M. M.,Owens, M. J.,Fallows, R. A.,&Dorrian, G. D..(2013).Effects of Thomson-Scattering Geometry on White-Light Imaging of an Interplanetary Shock: Synthetic Observations from Forward Magnetohydrodynamic Modelling.SOLAR PHYSICS,285(1-2),369-389. |
| MLA | Xiong, Ming,et al."Effects of Thomson-Scattering Geometry on White-Light Imaging of an Interplanetary Shock: Synthetic Observations from Forward Magnetohydrodynamic Modelling".SOLAR PHYSICS 285.1-2(2013):369-389. |
入库方式： OAI收割
来源：国家空间科学中心
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