Progress in Solar Magnetic Field Extrapolation

HAO Juan; ZHANG Mei

Astronomical Research and Technology > 2007 > 4(2): 126-134.

HAO Juan, ZHANG Mei. Progress in Solar Magnetic Field Extrapolation[J]. Astronomical Research and Technology, 2007, 4(2): 126-134.

Citation:

HAO Juan, ZHANG Mei. Progress in Solar Magnetic Field Extrapolation[J]. Astronomical Research and Technology, 2007, 4(2): 126-134.

Citation:

HAO Juan, ZHANG Mei. Progress in Solar Magnetic Field Extrapolation[J]. Astronomical Research and Technology, 2007, 4(2): 126-134.

PDF (543 KB)

Progress in Solar Magnetic Field Extrapolation

HAO Juan^1,2,
ZHANG Mei²

1.
College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
2.
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China

More Information

Received Date: November 20, 2006
Revised Date: December 24, 2006
Published Date: April 14, 2007

Graphical Abstract

Abstract

Abstract

Solar magnetic field is the predominant factor of the solar activities.Precise measurements of solar magnetic fields so far are still confined to the thin layer of solar photosphere.In order to understand the nature of the coronal magnetic fields, it becomes necessary to extrapolate the coronal magnetic fields based on theoretical models using observed photospheric magnetograms as boundary conditions.Taking force-free assumptions, three kinds of models are currently being used the potential field (or current-free field)model, the linear force-free field (or constant-αforce-free field)model, and the non-linear force-free (NLFF)field (or non-constant-αforce-free field)model.Methods of extrapolations based on these three models are introduced, with specific examples given and their astrophysical applications mentioned.Progress and problems in the extrapolation methods are also briefly addressed.
- astrophysics,
- extrapolation,
- review,
- solar

FullText(HTML)

References (0)

Articles Related

[1]	Xu Yonghua, Wang Min, Hao Longfei, Li Zhixuan, Dong Liang, Dong Jiang, Guo Shaojie. Simulations of a Low-Frequency Solar Radio Interferometry Array [J]. Astronomical Research and Technology, 2013, 10(3): 242-248.
[2]	ZHANG Hong-qi. Observational Solar Magnetic Field [J]. Astronomical Research and Technology, 2003, 0(1): 67-70.
[3]	Li Kejun. Features of the Solar Active Cycles [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 446-450.
[4]	Y. D. Park, Y. J. Moon, H. S. Yun. Vector Magnetograph Observations by the Solar Flare Telescope at Boao [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 441-445.
[5]	Xia Zhiguo, Cao Ying, Chen Jingying, Li Weihua, Jin Zhenyu, Wang Shubao, Liu Xiao, Wang Min. Observations and Research on the Solar Radio Spectrum at Yunnan Observatory [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 409-412.
[6]	Cao Wenda, Song Qian. Model of Spectral Fluxes for Solar Spectrograph [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 400-404.
[7]	Xie R. X., Wang M.. Observational Evidence for Solar Radio Microflares with Unusual Characteristics [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 396-399.
[8]	Qu Z. Q., Chen X. K., Zhang X. Y., Gu X. M., Feng Y. M., Zhong S. H.. Solar Stokes Spectrum Observation at Yunnan Astronomical Observatory [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 278-281.
[9]	Zhang Bin, Li Wei, Song Guofeng, Jin Shengzhen. Presentation on the Electronic Control System of Space Solar Telescope [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 130-133.
[10]	Song Guofeng. Near-Infrared Solar Electric Field Telescope [J]. Publications of the Yunnan Observatory, 1999, 0(S1): 120-123.