DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS
文献类型：期刊论文
| 作者 | Yang, YF1,2,3; Ji, KF1 ; Feng, S1,2,3; Deng, H1; Wang F(王锋)1,4; Lin, JB2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-09-10 |
| 卷号 | 810期号:2 |
| 关键词 | methods: data analysis methods: statistical Sun: photosphere techniques: image processing |
| ISSN号 | 0004-637X |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Yang, YF (reprint author), Kunming Univ Sci & Technol, Yunnan Key Lab Comp Technol Applicat, Fac Informat Engn & Automat, Kunming 650500, Yunnan, Peoples R China. |
| 英文摘要 | G-band bright points (GBPs) are thought to be the foot-points of magnetic flux tubes. The aim of this paper is to investigate the relation between the diffusion regimes of GBPs and the associated longitudinal magnetic field strengths. Two high resolution observations of different magnetized environments were acquired with the Hinode/ Solar Optical Telescope. Each observation was recorded simultaneously with G-band filtergrams and Narrow-band Filter Imager (NFI) Stokes I and V images. GBPs are identified and tracked automatically, and then categorized into several groups by their longitudinal magnetic field strengths, which are extracted from the calibrated NFI magnetograms using a point-by-point method. The Lagrangian approach and the distribution of diffusion indices approach are adopted separately to explore the diffusion regime of GBPs for each group. It is found that the values of diffusion index and diffusion coefficient both decrease exponentially with the increasing longitudinal magnetic field strengths whichever approach is used. The empirical formulas deduced from the fitting equations are proposed to describe these relations. Stronger elements tend to diffuse more slowly than weak elements, independently of the magnetic flux of the surrounding medium. This may be because the magnetic energy of stronger elements is not negligible compared with the kinetic energy of the gas, and therefore the flows cannot perturb them so easily. |
| 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 ; QUIET SUN ; ANOMALOUS DIFFUSION ; ACTIVE-REGION ; RANDOM-WALK ; ELEMENTS ; HINODE ; MOTION ; CORONA ; DYNAMICS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/0004-637X/810/2/88/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000362083700004 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4258]  |
| 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, Yunnan, 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 Observatory, Chinese Academy of Sciences, Yunnan 650011, China |
| 推荐引用方式 GB/T 7714 | Yang, YF,Ji, KF,Feng, S,et al. DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS[J]. ASTROPHYSICAL JOURNAL,2015,810(2). |
| APA | Yang, YF,Ji, KF,Feng, S,Deng, H,Wang F,&Lin, JB.(2015).DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS.ASTROPHYSICAL JOURNAL,810(2). |
| MLA | Yang, YF,et al."DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS".ASTROPHYSICAL JOURNAL 810.2(2015). |
入库方式： OAI收割
来源：云南天文台
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