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Magnetic Bright Points in the Solar Atmosphere
Li Dong ; Ning Zongjun
Source PublicationProgress in Astronomy
AbstractWe firstly review the recent findings about the Magnetic Bright points(MBPs) on the Sun.MBPs are small-scale and short-lived structures with enhanced brightness on the solar photosphere.They have a mean diameter ranging from 100 to 300 km,and a mean lifetime of several minutes.MBPs are highly dynamic.Most of the MBPs are related to the magnetic field,especially the small-scale field in the lower solar atmosphere.MBPs are frequently observed at the region with a strong field,especially in the line of sight(LOS) strong field,i.e.up to kilogauss.Therefore,lots of magnetic energy should be stored in the MBPs.To study the MBPs is important for us to understand the progress of the radiation from the photosphere and the nature of the solar magnetic fields.Meanwhile,MBPs are thought to produce the MHD waves contributing to the coronal heating.Previous observations show that the MBPs are related to the small-scale field evolution on the photosphere, such as the coalescence of the same-polarity,the cancelation of the opposite-polarities,or the fragmentation of one magnetic field.Based on this concept,we statistically study 2722 MBPs at 1600 A from the SDO observations and the corresponding bipolar fields,and find that about 1/3 MBPs are related to the magnetic bipolar fields,indicating the cancelation of the opposite-polarities is one of the important mechanisms to produce the MBPs.
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Recommended Citation
GB/T 7714
Li Dong,Ning Zongjun. Magnetic Bright Points in the Solar Atmosphere[J]. Progress in Astronomy,2012,30(2):172-185.
APA Li Dong,&Ning Zongjun.(2012).Magnetic Bright Points in the Solar Atmosphere.Progress in Astronomy,30(2),172-185.
MLA Li Dong,et al."Magnetic Bright Points in the Solar Atmosphere".Progress in Astronomy 30.2(2012):172-185.
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