Magnetohydrodynamic Simulations for Solar Active Regions using Time-series Data of Surface Plasma Flow and Electric Field Inferred from Helioseismic Magnetic Imager Vector Magnetic Field Measurements
文献类型：期刊论文
| 作者 | Hayashi, Keiji; Feng, Xueshang; Xiong, Ming; Jiang, Chaowei |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2019 |
| 卷号 | 871期号:2页码:L28 |
| ISSN号 | 2041-8205 |
| 关键词 | Sun: activity Sun: magnetic fields sunspots |
| DOI | 10.3847/2041-8213/aaffcf |
| 英文摘要 | Temporal evolution of magnetic structures of the solar active region (AR) NOAA AR 11158, is simulated with our magnetohydrodynamic (MHD) simulation models using time-dependent solar-surface electric field or plasma flow data. Using the Solar Dynamics Observatory/Helioseismic Magnetic Imager vector magnetogram data, the solar-surface boundary electric field maps are derived with our recently developed algorithm to reproduce the temporal evolution of solar-surface vector magnetic field as observed. The plasma motion velocity maps are calculated through the Differential Affine Velocity Estimator for Vector Magnetograms. In both data-driven models, the simulated evolutionary magnetic field structures at strong-field low-beta regions appear near force-free state, as the current helicity density (J.B/B-2) are roughly constant along each field line. Although the magnetic energy simulated with the newly developed plasma-velocity-driven model is about 10% of that by the electric-field driven model, the plasma-velocity-driven model can maintain the frozen-in condition, and evolution of current and free energy generated by the solar-surface plasma motions can be spatially and temporally traced. The present MHD simulation models for AR system can be a step toward better, more realistic data-driven evolutionary modeling, in particular, establishing boundary treatments for introducing the time-dependent observation data in a physically and mathematically consistent manner. |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/6943]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Hayashi, Keiji,Feng, Xueshang,Xiong, Ming,et al. Magnetohydrodynamic Simulations for Solar Active Regions using Time-series Data of Surface Plasma Flow and Electric Field Inferred from Helioseismic Magnetic Imager Vector Magnetic Field Measurements[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,871(2):L28. |
| APA | Hayashi, Keiji,Feng, Xueshang,Xiong, Ming,&Jiang, Chaowei.(2019).Magnetohydrodynamic Simulations for Solar Active Regions using Time-series Data of Surface Plasma Flow and Electric Field Inferred from Helioseismic Magnetic Imager Vector Magnetic Field Measurements.ASTROPHYSICAL JOURNAL LETTERS,871(2),L28. |
| MLA | Hayashi, Keiji,et al."Magnetohydrodynamic Simulations for Solar Active Regions using Time-series Data of Surface Plasma Flow and Electric Field Inferred from Helioseismic Magnetic Imager Vector Magnetic Field Measurements".ASTROPHYSICAL JOURNAL LETTERS 871.2(2019):L28. |
入库方式： OAI收割
来源：国家空间科学中心
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