Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations

	Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations
	Liu Y(刘煜)1,2
刊名	ANNALES GEOPHYSICAE
	2009
卷号	27 期号:7 页码:2771-2777
关键词	Solar physics Corona and transition region Magnetic fields astrophysics and astronomy
ISSN号	0992-7689
通讯作者	Liu, Y (reprint author), Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
关键词[WOS]	EMISSION-LINE POLARIZATION ; SPECTRAL-LINES ; SOLAR CORONA ; DENSITY ; VECTOR ; PROBE
收录类别	SCI ; EI
原文出处	http://www.ann-geophys.net/27/2771/2009/angeo-27-2771-2009.html
语种	英语
WOS记录号	WOS:000268622700014
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7173]
专题	云南天文台_选址与日冕观测组
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
推荐引用方式 GB/T 7714	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.(2009).Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations.ANNALES GEOPHYSICAE,27(7),2771-2777.
MLA	Liu Y."Coronal magnetic fields inferred from IR wavelength and comparison with EUV observations".ANNALES GEOPHYSICAE 27.7(2009):2771-2777.