Weak infrared molecular lines reveal rapid outflow in cool magnetic sunspot penumbral fibrils

CORC > 云南天文台 > 中国科学院云南天文台 > 其他

	Weak infrared molecular lines reveal rapid outflow in cool magnetic sunspot penumbral fibrils
	Penn, MJ 1,2; Cao WD(曹文达)3,4 ; Walton, SR 2; Chapman, GA 2; Livingston, W 1
刊名	ASTROPHYSICAL JOURNAL
	2003-06-20
卷号	590 期号:2 页码:L119-L122
关键词	Sun : atmospheric motions Sun : infrared sunspots techniques : spectroscopic
ISSN号	0004-637X
通讯作者	Penn, MJ (reprint author), San Fernando Observ, Dept Phys & Astron, 18111 Nordhoff St, Northridge, CA 91330 USA.
产权排序	第三完成单位
英文摘要	New imaging spectropolarimetric observations of the Evershed flow in sunspot penumbrae using weak infrared molecular absorption lines are presented. A plane-polar coordinate system in the sunspot frame is defined, allowing averaging of many raw spectra. Molecular lines show Doppler shifts implying typical horizontal outflow speeds of 6 and up to 9 km s(-1). The Ti I polarimetric spectra show the same rapid outflow and suggest an average penumbral magnetic field strength of 1400 G. While these observations show Doppler shifts of the entire line profile, the velocities are in better agreement with previous measurements from spectral line asymmetries.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	EVERSHED FLOW ; SPATIAL STRUCTURE ; SIPHON FLOWS ; FLUX TUBES ; FEATURES ; PROBES ; ASYMMETRIES ; INTENSITY ; VELOCITY ; GEOMETRY
收录类别	SCI
原文出处	http://iopscience.iop.org/1538-4357/590/2/L119/
语种	英语
WOS记录号	WOS:000183459600014
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4160]
专题	云南天文台_其他
作者单位	1.National Solar Observatory (operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation), 950 North Cherry Avenue, Tucson, AZ 85719 2.Department of Physics and Astronomy, San Fernando Observatory and California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330-8268 3.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, Yunnan, China 4.Center for Solar Research, New Jersey Institute of Technology, 323 Martin Luther King Boulevard, Newark, NJ 07102
推荐引用方式 GB/T 7714	Penn, MJ,Cao WD,Walton, SR,et al. Weak infrared molecular lines reveal rapid outflow in cool magnetic sunspot penumbral fibrils[J]. ASTROPHYSICAL JOURNAL,2003,590(2):L119-L122.
APA	Penn, MJ,Cao WD,Walton, SR,Chapman, GA,&Livingston, W.(2003).Weak infrared molecular lines reveal rapid outflow in cool magnetic sunspot penumbral fibrils.ASTROPHYSICAL JOURNAL,590(2),L119-L122.
MLA	Penn, MJ,et al."Weak infrared molecular lines reveal rapid outflow in cool magnetic sunspot penumbral fibrils".ASTROPHYSICAL JOURNAL 590.2(2003):L119-L122.