A Solar Eruption with Relatively Strong Geoeffectiveness Originating from Active Region Peripheral Diffusive Polarities
文献类型：期刊论文
| 作者 | Wang, Rui; Liu, Ying D.; Hu, Huidong; Zhao, Xiaowei; Liu, YD (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Natl Space Sci Ctr, Beijing, Peoples R China.; Liu, YD (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018 |
| 卷号 | 863期号:1页码:81 |
| ISSN号 | 0004-637X |
| 关键词 | Solar-terrestrial Relations Sun: Activity Sun: Coronal Mass Ejections (Cmes) Sun: Magnetic Fields |
| 英文摘要 | We report the observations of a moderate but relatively intense geoeffective solar eruption on 2015 November 4 from the peripheral diffusive polarities of active region 12443. We use space-borne Solar Dynamics Observatory and ACE observations. EUV images identified a helical pattern along a filament channel, and we regard this channel as flux-rope structure. Flow velocity derived from tracked magnetograms infers converging motion along the polarity inversion line beneath the filament channel. An associated magnetic cancellation process was detected in the converging region. Further, the pre-eruptive EUV brightening was observed in the converging region, the most intense part of which appeared in the magnetic cancellation region. These observations imply that the converging and canceling flux probably contributed to the formation of the helical magnetic fields associated with the flux rope. A filament-height estimation method suggests that the middle part of the filament probably lies at a low altitude and was consistent with the initial place of the eruption. A thick current channel associated with the flux rope is also determined. For an expanding thick current channel, the critical height of the decay index for torus instability lies in the range of 37-47 Mm. Southward magnetic fields in the sheath and the ejecta induced a geomagnetic storm with a D-st global minimum of similar to-90 nT. |
| 语种 | 英语 |
| 资助机构 | NSFC [41604146, 41774179, 41374173] ; Specialized Research Fund for State Key Laboratories of China ; Strategic Priority Program on Space Science [XDA 15011300] ; China Scholarship Council |
| 源URL | [http://ir.nssc.ac.cn/handle/122/6397]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 通讯作者 | Liu, YD (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Natl Space Sci Ctr, Beijing, Peoples R China.; Liu, YD (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wang, Rui,Liu, Ying D.,Hu, Huidong,et al. A Solar Eruption with Relatively Strong Geoeffectiveness Originating from Active Region Peripheral Diffusive Polarities[J]. ASTROPHYSICAL JOURNAL,2018,863(1):81. |
| APA | Wang, Rui,Liu, Ying D.,Hu, Huidong,Zhao, Xiaowei,Liu, YD ,&Liu, YD .(2018).A Solar Eruption with Relatively Strong Geoeffectiveness Originating from Active Region Peripheral Diffusive Polarities.ASTROPHYSICAL JOURNAL,863(1),81. |
| MLA | Wang, Rui,et al."A Solar Eruption with Relatively Strong Geoeffectiveness Originating from Active Region Peripheral Diffusive Polarities".ASTROPHYSICAL JOURNAL 863.1(2018):81. |
入库方式： OAI收割
来源：国家空间科学中心
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