Observational Analysis of Multithermal Counterstreaming Flows in a Forming Filament and Their Relationship with Local Heating at Filament Footpoints
文献类型：期刊论文
| 作者 | Li, Hongrui3; Chen, Hechao2,3; Xia, Chun2,3; Yan XL(闫晓理)1,2; Xiang YY(向永源)1; Wang JC(王金成)1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-10-10 |
| 卷号 | 992期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/adfc5e |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | Utilizing high-resolution imaging and spectroscopic observations from the New Vacuum Solar Telescope, the Interface Region Imaging Spectrograph, and the Solar Dynamics Observatory, we investigated the nature and origin of counterstreaming flows within a forming active region filament. The ever-present counterstreaming flows observed within the filament are identified as interleaved unidirectional mass flows in opposing directions occurring in neighboring threads. Multiwavelength observations corroborate the multithermal nature of these counterstreaming flows: the cool H alpha component flows at about 10-20 km s-1, while the warm ultraviolet and extreme-ultraviolet components reach 40-70 km s-1. The Si iv 1400 & Aring; line reveals significant microturbulence in the filament's counterstreaming flows, with a nonthermal velocity width of similar to 40 km s-1. These multithermal flows emanate from compact brightenings at the filament's ends, manifesting as small-scale, collimated upflows at their nascent phase. They continuously inject both chromospheric and transition region plasma into the filament channel, thereby feeding the counterstreaming flows. At their base, the Si iv and C ii spectral lines show pronounced line broadening and intensity enhancements, indicating significant localized chromospheric heating. Additionally, numerous small-scale photospheric flux emergence and cancellation events, with a magnitude of similar to 1017 Mx, are detected near their base. We suggest that such weak magnetic-field activities, possibly associated with unresolved magnetic reconnection events, drive these persistent upflows and localized footpoint heating. This work elucidates the multithermal origin of counterstreaming flows within a forming filament and provides evidence of localized chromospheric heating at the filament footpoints. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | ACTIVE-REGION FILAMENT ; SOLAR PROMINENCE FORMATION ; COUNTER-STREAMING FLOWS ; MAGNETIC RECONNECTION ; CORONAL JETS ; MASS FLOWS ; MINIFILAMENT ERUPTIONS ; NETWORK JETS ; FLUX ROPE ; EVOLUTION |
| 资助项目 | NSFC[12325303]; NSFC[12573061]; NSFC[12073022]; NSFC[12473059]; NSFC[12103005]; Yunnan Key Laboratory of Solar Physics and Space Science[YNSPCC202210]; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]; Yunnan Provincial Basic Research Projects[202401CF070165]; Yunnan Provincial Basic Research Projects[202501AW070002]; Yunnan Provincial Basic Research Projects[202301AT070350]; Graduate Research Innovation Project of Yunnan University[KC-24249880] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001586374400001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | NSFC[12325303, 12573061, 12073022, 12473059, 12103005] ; Yunnan Key Laboratory of Solar Physics and Space Science[YNSPCC202210, 202205AG070009] ; Yunnan Provincial Basic Research Projects[202401CF070165, 202501AW070002, 202301AT070350] ; Graduate Research Innovation Project of Yunnan University[KC-24249880] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28631]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Chen, Hechao |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China 2.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming, 650216, People’s Republic of China; 3.School of Physics and Astronomy, Yunnan University, Kunming 650500, People’s Republic of China, hechao.chen@ynu.edu.cn; |
| 推荐引用方式 GB/T 7714 | Li, Hongrui,Chen, Hechao,Xia, Chun,et al. Observational Analysis of Multithermal Counterstreaming Flows in a Forming Filament and Their Relationship with Local Heating at Filament Footpoints[J]. ASTROPHYSICAL JOURNAL,2025,992(1). |
| APA | Li, Hongrui,Chen, Hechao,Xia, Chun,闫晓理,向永源,&王金成.(2025).Observational Analysis of Multithermal Counterstreaming Flows in a Forming Filament and Their Relationship with Local Heating at Filament Footpoints.ASTROPHYSICAL JOURNAL,992(1). |
| MLA | Li, Hongrui,et al."Observational Analysis of Multithermal Counterstreaming Flows in a Forming Filament and Their Relationship with Local Heating at Filament Footpoints".ASTROPHYSICAL JOURNAL 992.1(2025). |
入库方式： OAI收割
来源：云南天文台
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