Characterizing motion types of G-band bright points in the quiet Sun
文献类型：期刊论文
| 作者 | Yang, Yun-Fei1,2,3; Qu, Hui-Xue1; Ji, Kai-Fan1 ; Feng, Song1,2,3; Deng, Hui1; Lin, Jia-Ben2; Wang F(王锋)1,4
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2015-04-01 |
| 卷号 | 15期号:4页码:569-582 |
| 关键词 | techniques: image processing Sun: photosphere methods: data analysis methods: statistical |
| ISSN号 | 1674-4527 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Wang, F (reprint author), Kunming Univ Sci & Technol, Fac Informat Engn & Automat, Yunnan Key Lab Comp Technol Applicat, Kunming 650500, Peoples R China |
| 英文摘要 | We study the motion of G-band bright points (GBPs) in the quiet Sun to obtain the characteristics of different motion types. A high resolution image sequence taken with the Hinode/Solar Optical Telescope (SOT) is used, and GBPs are automatically tracked by segmenting 3D evolutional structures in a space-time cube. After putting the GBPs that do not move during their lifetimes aside, the non-stationary GBPs are categorized into three types based on an index of their motion type. Most GBPs that move in straight or nearly straight lines are categorized as a straight motion type, a few moving in rotary paths into rotary motion, and the others fall into a motion type we called erratic. The mean horizontal velocities are 2.18 +/- 0.08 k m s(-1), 1.63 +/- 0.09 k m s(-1) and 1.33 +/- 0.07 k m s(-1) for straight, erratic and rotary motion types, respectively. We find that a GBP drifts at a higher and constant velocity during its whole life if it moves in a straight line. However, it has a lower and variational velocity if it moves on a rotary path. The diffusive process is ballistic-, super-and sub-diffusion for straight, erratic and rotary motion types, respectively. The corresponding diffusion index (gamma) and coefficients (K) are 2.13 +/- 0.09 and 850 +/- 37 k m(2) s(-1), 1.82 +/- 0.07 and 331 +/- 24 k m(2) s(-1), and 0.73 +/- 0.19 and 13 +/- 9 k m(2) s(-1). In terms of direction of motion, it is homogeneous and isotropic, and usually persists between neighboring frames, no matter what motion type a GBP is classified as. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SOLAR OPTICAL TELESCOPE ; MAGNETIC ELEMENTS ; ACTIVE-REGION ; ALFVEN WAVES ; PHOTOSPHERE ; DYNAMICS ; DIFFUSION ; SIMULATIONS ; PROPAGATION ; DISPERSAL |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/1674-4527/15/4/009/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000352130400009 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4266]  |
| 专题 | 云南天文台_其他 |
| 作者单位 | 1.Faculty of Information Engineering and Automation / Yunnan Key Laboratory of Computer Technology Application, Kunming University of Science and Technology, Kunming 650500, China 2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 3.Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing 210093, China 4.Yunnan Observatories, Chinese Academy of Sciences, Yunnan 650011, China |
| 推荐引用方式 GB/T 7714 | Yang, Yun-Fei,Qu, Hui-Xue,Ji, Kai-Fan,et al. Characterizing motion types of G-band bright points in the quiet Sun[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(4):569-582. |
| APA | Yang, Yun-Fei.,Qu, Hui-Xue.,Ji, Kai-Fan.,Feng, Song.,Deng, Hui.,...&Wang F.(2015).Characterizing motion types of G-band bright points in the quiet Sun.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(4),569-582. |
| MLA | Yang, Yun-Fei,et al."Characterizing motion types of G-band bright points in the quiet Sun".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.4(2015):569-582. |
入库方式： OAI收割
来源：云南天文台
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