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, Feng1,4; Lin Jiaben
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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 |
| 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000352130400009 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5751]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Kunming Univ Sci & Technol, Fac Informat Engn & Automat, Yunnan Key Lab Comp Technol Applicat, Kunming 650500, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 3.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 4.Chinese Acad Sci, Yunnan Observ, Yunnan 650011, Peoples R 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.,...&Lin Jiaben.(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：国家天文台
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