| An MHD Simulation of Solar Active Region 11158 Driven with a Time-dependent Electric Field Determined from HMI Vector Magnetic Field Measurement Data | |
| Hayashi, Keiji; Feng, Xueshang; Xiong, Ming; Jiang, Chaowei; Hayashi, K (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.; Hayashi, K (reprint author), Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan. | |
| Department | 空间科学部 |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| 2018 | |
| Volume | 855Issue:1Pages:11 |
| ISSN | 0004-637X |
| Language | 英语 |
| Keyword | Magnetohydrodynamics (Mhd) Sun: Magnetic Fields Sunspots |
| Abstract | For realistic magnetohydrodynamics (MHD) simulation of the solar active region (AR), two types of capabilities are required. The first is the capability to calculate the bottom-boundary electric field vector, with which the observed magnetic field can be reconstructed through the induction equation. The second is a proper boundary treatment to limit the size of the sub-Alfvenic simulation region. We developed (1) a practical inversion method to yield the solar-surface electric field vector from the temporal evolution of the three components of magnetic field data maps, and (2) a characteristic-based free boundary treatment for the top and side sub-Alfvenic boundary surfaces. We simulate the temporal evolution of AR 11158 over 16 hr for testing, using Solar Dynamics Observatory/Helioseismic Magnetic Imager vector magnetic field observation data and our time-dependent three-dimensional MHD simulation with these two features. Despite several assumptions in calculating the electric field and compromises for mitigating computational difficulties at the very low beta regime, several features of the AR were reasonably retrieved, such as twisting field structures, energy accumulation comparable to an X-class flare, and sudden changes at the time of the X-flare. The present MHD model can be a first step toward more realistic modeling of AR in the future. |
| Indexed By | SCI |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/6193 |
| Collection | 空间科学部 |
| Corresponding Author | Hayashi, K (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.; Hayashi, K (reprint author), Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan. |
| Recommended Citation GB/T 7714 | Hayashi, Keiji,Feng, Xueshang,Xiong, Ming,et al. An MHD Simulation of Solar Active Region 11158 Driven with a Time-dependent Electric Field Determined from HMI Vector Magnetic Field Measurement Data[J]. ASTROPHYSICAL JOURNAL,2018,855(1):11. |
| APA | Hayashi, Keiji,Feng, Xueshang,Xiong, Ming,Jiang, Chaowei,Hayashi, K ,&Hayashi, K .(2018).An MHD Simulation of Solar Active Region 11158 Driven with a Time-dependent Electric Field Determined from HMI Vector Magnetic Field Measurement Data.ASTROPHYSICAL JOURNAL,855(1),11. |
| MLA | Hayashi, Keiji,et al."An MHD Simulation of Solar Active Region 11158 Driven with a Time-dependent Electric Field Determined from HMI Vector Magnetic Field Measurement Data".ASTROPHYSICAL JOURNAL 855.1(2018):11. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| 2018855111.pdf（4694KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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