DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS
文献类型：期刊论文
| 作者 | Yang, Yunfei1,2,3; Ji, Kaifai1; Feng, Song1,2,3; Deng, Hui1; Wang, Feng1,4; Lin, Jiaben2
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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 |
| 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000362083700004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5565]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Kunming Univ Sci & Technol, Yunnan Key Lab Comp Technol Applicat, Fac Informat Engn & Automat, Kunming 650500, Yunnan, 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, Kyoto, Yunnan 650011, Japan |
| 推荐引用方式 GB/T 7714 | Yang, Yunfei,Ji, Kaifai,Feng, Song,et al. DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS[J]. ASTROPHYSICAL JOURNAL,2015,810(2). |
| APA | Yang, Yunfei,Ji, Kaifai,Feng, Song,Deng, Hui,Wang, Feng,&Lin, Jiaben.(2015).DISPERSAL OF G-BAND BRIGHT POINTS AT DIFFERENT LONGITUDINAL MAGNETIC FIELD STRENGTHS.ASTROPHYSICAL JOURNAL,810(2). |
| MLA | Yang, Yunfei,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：国家天文台
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