The Heliospheric Plasma Sheet Observed in situ by Three Spacecraft over Four Solar Rotations
文献类型：期刊论文
| 作者 | Simunac, K. D. C.; Galvin, A. B.; Farrugia, C. J.; Kistler, L. M.; Kucharek, H.; Lavraud, B.; Liu, Y. C. -M.; Luhmann, J. G.; Ogilvie, K. W.; Opitz, A. |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2012 |
| 卷号 | 281期号:1页码:423-447 |
| ISSN号 | 0038-0938 |
| 通讯作者 | Simunac, KDC (reprint author), Univ New Hampshire, Durham, NH 03824 USA. |
| 中文摘要 | In this paper we present in situ observations of the heliospheric plasma sheet (HPS) from STEREO-A, Wind, and STEREO-B over four solar rotations in the declining phase of Solar Cycle 23, covering late March through late June 2007. During this time period the three spacecraft were located in the ecliptic plane, and were gradually separating in heliographic longitude from about 3 degrees to 14 degrees. Crossings of the HPS were identified using the following criteria: reversal of the interplanetary magnetic field sector, enhanced proton density, and local minima in both the proton specific entropy argument and in the alpha particle-to-proton number density ratio (N (a)/N (p)). Two interplanetary coronal mass ejections (ICMEs) were observed during the third solar rotation of our study period, which disrupted the HPS from its quasi-stationary state. We find differences in the in situ proton parameters at the HPS between the three spacecraft despite temporal separations of less than one day. We attribute these differences to both small separations in heliographic latitude and radial evolution of the solar wind leading to the development of compression regions associated with stream interaction regions (SIRs). We also observed a modest enhancement in the density of iron ions at the HPS. |
| 英文摘要 | In this paper we present in situ observations of the heliospheric plasma sheet (HPS) from STEREO-A, Wind, and STEREO-B over four solar rotations in the declining phase of Solar Cycle 23, covering late March through late June 2007. During this time period the three spacecraft were located in the ecliptic plane, and were gradually separating in heliographic longitude from about 3 degrees to 14 degrees. Crossings of the HPS were identified using the following criteria: reversal of the interplanetary magnetic field sector, enhanced proton density, and local minima in both the proton specific entropy argument and in the alpha particle-to-proton number density ratio (N (a)/N (p)). Two interplanetary coronal mass ejections (ICMEs) were observed during the third solar rotation of our study period, which disrupted the HPS from its quasi-stationary state. We find differences in the in situ proton parameters at the HPS between the three spacecraft despite temporal separations of less than one day. We attribute these differences to both small separations in heliographic latitude and radial evolution of the solar wind leading to the development of compression regions associated with stream interaction regions (SIRs). We also observed a modest enhancement in the density of iron ions at the HPS. |
| 学科主题 | 空间物理 |
| 资助信息 | NASA [NAS5-00132, NNX10AQ29G] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3164]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Simunac, K. D. C.,Galvin, A. B.,Farrugia, C. J.,et al. The Heliospheric Plasma Sheet Observed in situ by Three Spacecraft over Four Solar Rotations[J]. SOLAR PHYSICS,2012,281(1):423-447. |
| APA | Simunac, K. D. C..,Galvin, A. B..,Farrugia, C. J..,Kistler, L. M..,Kucharek, H..,...&Wang, S..(2012).The Heliospheric Plasma Sheet Observed in situ by Three Spacecraft over Four Solar Rotations.SOLAR PHYSICS,281(1),423-447. |
| MLA | Simunac, K. D. C.,et al."The Heliospheric Plasma Sheet Observed in situ by Three Spacecraft over Four Solar Rotations".SOLAR PHYSICS 281.1(2012):423-447. |
入库方式： OAI收割
来源：国家空间科学中心
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