Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL093068 |
A foreshock bubble driven by an IMF tangential discontinuity: 3D global hybrid simulation | |
Chih‐; Ping Wang; Xueyi Wang; Terry Z. Liu; Yu Lin | |
2021-04-26 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Foreshock bubbles (FBs) have been observed upstream of solar wind tangential discontinuities (TDs). A hypothesized mechanism is that foreshock ions with gyroradii larger than the TD thickness may move to upstream side of TDs and generate FBs. In this study, we present the very first three‐dimensional global hybrid simulation of an FB driven by a TD. After the TD encounters the ion foreshock, plasma and magnetic field perturbations are generated upstream of the TD. These perturbations are characteristically consistent with the observed TD‐driven FBs, confirming that TDs can form FBs. We further analyze the initial perpendicular temperature increase initiating the FB and compare the temperature structure with that from tracing test‐particles in static TD electric and magnetic fields. The structure can be explained by the perpendicular velocity change of foreshock ions with large gyroradii as they encounter the magnetic field direction change across the TD, which supports the hypothesized mechanism. This article is protected by copyright. All rights reserved. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/324970 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Chih‐,Ping Wang,Xueyi Wang,et al. A foreshock bubble driven by an IMF tangential discontinuity: 3D global hybrid simulation[J]. Geophysical Research Letters,2021. |
APA | Chih‐,Ping Wang,Xueyi Wang,Terry Z. Liu,&Yu Lin.(2021).A foreshock bubble driven by an IMF tangential discontinuity: 3D global hybrid simulation.Geophysical Research Letters. |
MLA | Chih‐,et al."A foreshock bubble driven by an IMF tangential discontinuity: 3D global hybrid simulation".Geophysical Research Letters (2021). |
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