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Characterizing motion types of G-band bright points in the quiet Sun
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
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2015-04-01
卷号15期号:4页码:569-582
DOI10.1088/1674-4527/15/4/009
产权排序第4完成单位
收录类别SCI
关键词Techniques: Image Processing Sun: Photosphere Methods: Data Analysis Methods: Statistical
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.

资助项目National Natural Science Foundation of China[11303011] ; National Natural Science Foundation of China[11263004] ; National Natural Science Foundation of China[11163004] ; National Natural Science Foundation of China[U1231205] ; Key Laboratory of Solar Activity of the Chinese Academy of Sciences[KLSA201414] ; Key Laboratory of Solar Activity of the Chinese Academy of Sciences[KLSA201309] ; Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences[CAS-KLAOT-KF201306] ; Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, China
项目资助者National Natural Science Foundation of China[11303011, 11263004, 11163004, U1231205] ; Key Laboratory of Solar Activity of the Chinese Academy of Sciences[KLSA201414, KLSA201309] ; Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences[CAS-KLAOT-KF201306] ; Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, China
语种英语
学科领域天文学 ; 太阳与太阳系
学科门类理学 ; 理学::天文学
文章类型Article
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
出版地20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS记录号WOS:000352130400009
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SOLAR OPTICAL TELESCOPE ; MAGNETIC ELEMENTS ; ACTIVE-REGION ; ALFVEN WAVES ; PHOTOSPHERE ; DYNAMICS ; DIFFUSION ; SIMULATIONS ; PROPAGATION ; DISPERSAL
引用统计
被引频次:38[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/4266
专题其他
通讯作者Wang F(王锋)
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
通讯作者单位中国科学院云南天文台
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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.
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