A study of line widths and kinetic parameters of ions in the solar corona

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳和太阳系等离子体研究团组

	A study of line widths and kinetic parameters of ions in the solar corona
	Zhao, G. Q.1,2; Wu, D. J.1; Wang, C. B.3
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2014-10-01
卷号	353 期号:2 页码:373-378
关键词	Sun: corona Sun: UV radiation Sun: fundamental parameters
ISSN号	0004-640X
英文摘要	Solar extreme-ultraviolet (EUV) lines emitted by highly charged ions have been extensively studied to discuss the issue of coronal heating and solar wind acceleration. Based on observations of the polar corona by the SUMER/SOHO spectrometer, this paper investigates the relation between the line widths and kinetic parameters of ions. It is shown that there exists a strongly linear correlation between two variables (sigma/lambda)(2) and M (-1), where sigma, lambda and M are the half-width of the observed line profile at , the wavelength and the ion mass, respectively. The Pearson product-moment correlation coefficients exceed 0.9. This finding tends to suggest that the ions from a given height of polar corona have a common temperature and a common non-thermal velocity in terms of existing equation. The temperature and non-thermal velocity are obtained by linear least-square fit. The temperature is around 2.8 MK at heights of 57aEuro(3) and 102aEuro(3). The non-thermal velocity is typical 21.6 km s(-1) at height of 57aEuro(3) and 25.2 km s(-1) at height of 102aEuro(3).
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	R-CIRCLE-DOT ; ALFVEN WAVES ; IONIZATION EQUILIBRIUM ; NONTHERMAL VELOCITY ; SUMER TELESCOPE ; TRANSITION ZONE ; EMISSION-LINES ; QUIET-SUN ; LIMB ; HOLES
收录类别	SCI
原文出处	10.1007/s10509-014-2072-y
语种	英语
WOS记录号	WOS:000342146300008
公开日期	2014-11-20
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/10636]
专题	紫金山天文台_太阳和太阳系等离子体研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhao, G. Q.,Wu, D. J.,Wang, C. B.. A study of line widths and kinetic parameters of ions in the solar corona[J]. ASTROPHYSICS AND SPACE SCIENCE,2014,353(2):373-378.
APA	Zhao, G. Q.,Wu, D. J.,&Wang, C. B..(2014).A study of line widths and kinetic parameters of ions in the solar corona.ASTROPHYSICS AND SPACE SCIENCE,353(2),373-378.
MLA	Zhao, G. Q.,et al."A study of line widths and kinetic parameters of ions in the solar corona".ASTROPHYSICS AND SPACE SCIENCE 353.2(2014):373-378.