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Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations
Liu Y(刘煜)1,2; Liu, Y (reprint author), Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
发表期刊ANNALES GEOPHYSICAE
2009
卷号27期号:7页码:2771-2777
DOI10.5194/angeo-27-2771-2009
产权排序第1完成单位
收录类别SCI ; EI
关键词Corona And Transition Region Solar Physics Magnetic Fields Astrophysics And Astronomy
摘要Spectropolarimetry using IR wavelength of 1075 nm has been proved to be a powerful tool for directly mapping solar coronal magnetic fields including transverse component directions and line-of-sight component intensities. Solar tomography, or stereoscopy based on EUV observations, can supply 3-D information for some magnetic field lines in bright EUV loops. In a previous paper (Liu and Lin, 2008) the locations of the IR emission sources in the 3-D coordinate system were inferred from the comparison between the polarization data and the potential-field-source-surface (PFSS) model, for one of five west limb regions in the corona (Lin et al., 2004). The paper shows that the region with the loop system in the active region over the photospheric area with strong magnetic field intensity is the region with a dominant contribution to the observed Stokes signals. So, the inversion of the measured Stokes parameters could be done assuming that most of the signals come from a relatively thin layer over the area with a large photospheric magnetic field strength. Here, the five limb coronal regions are studied together in order to study the spatial correlation between the bright EUV loop features and the inferred IR emission sources. It is found that, for the coronal regions above the stronger photospheric magnetic fields, the locations of the IR emission sources are closer to or more consistent with the bright EUV loop locations than those above weaker photospheric fields. This result suggests that the structures of the coronal magnetic fields observed at IR and EUV wavelengths may be different when weak magnetic fields present there.
项目资助者National Natural Science Foundation of China [10843010]
语种英语
学科领域Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
文章类型Article
ISSN0992-7689
URL查看原文
WOS记录号WOS:000268622700014
WOS研究方向Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
WOS类目Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
关键词[WOS]EMISSION-LINE POLARIZATION ; SPECTRAL-LINES ; SOLAR CORONA ; DENSITY ; VECTOR ; PROBE
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/7173
专题选址与日冕观测组
通讯作者Liu, Y (reprint author), Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Astronomical Observatory, National Astronomical Observatories, Kunming 650011, China
2.Institute for Astronomy, University of Hawaii, 34 Ohia Ku Street, Pukalani, HI 96768, USA
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GB/T 7714
Liu Y,Liu, Y . Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations[J]. ANNALES GEOPHYSICAE,2009,27(7):2771-2777.
APA Liu Y,&Liu, Y .(2009).Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations.ANNALES GEOPHYSICAE,27(7),2771-2777.
MLA Liu Y,et al."Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations".ANNALES GEOPHYSICAE 27.7(2009):2771-2777.
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