期刊
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷 229, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-4365/229/1/8
关键词
methods: observational; Sun: magnetic fields; Sun: photosphere
资金
- Max Planck Foundation
- Strategic Innovations Fund of the President of the Max Planck Society (MPG)
- DLR
- members of the Max Planck Society
- Ministerio de Economia y Competitividad [ESP2013-47349-C6, ESP2014-56169-C6]
- European FEDER funds
- NASA [NNX13AE95G]
- BK21 plus program through the National Research Foundation (NRF) - Ministry of Education of Korea
- Research Council of Norway
Convective flows are known as the prime means of transporting magnetic fields on the solar surface. Thus, small magnetic structures are good tracers of turbulent flows. We study the migration and dispersal of magnetic bright features (MBFs) in intergranular areas observed at high spatial resolution with SUNRISE/IMaX. We describe the flux dispersal of individual MBFs as a diffusion process whose parameters are computed for various areas in the quiet-Sun and the vicinity of active regions from seeing-free data. We find that magnetic concentrations are best described as random walkers close to network areas (diffusion index, gamma = 1.0), travelers with constant speeds over a supergranule (gamma = 1.9-2.0), and decelerating movers in the vicinity of flux emergence and/or within active regions (gamma = 1.4-1.5). The three types of regions host MBFs with mean diffusion coefficients of 130 km(2) s(-1), 80-90 km(2) s(-1), and 25-70 km(2) s(-1), respectively. The MBFs in these three types of regions are found to display a distinct kinematic behavior at a confidence level in excess of 95%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据