REVISION OF SOLAR SPICULE CLASSIFICATION

	REVISION OF SOLAR SPICULE CLASSIFICATION
	Zhang, YZ 1,2; Shibata, K 2; Wang, JX1 ; Mao, XJ 1,3; Matsumoto, T 4; Liu Y(刘煜)5 ; Su, JT 1
刊名	ASTROPHYSICAL JOURNAL
	2012-05
卷号	750 期号:1
关键词	Sun: chromosphere Sun: corona Sun: transition region
ISSN号	0004-637X
通讯作者	Zhang, YZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China.
产权排序	第五完成单位
英文摘要	Solar spicules are the fundamental magnetic structures in the chromosphere and may play a key role in channeling the chromosphere and corona. Recently, it was suggested by De Pontieu et al. that there were two types of spicules with very different dynamic properties, which were detected by the space-time plot technique in the Ca II H line (3968 angstrom) wavelength from Hinode/Solar Optical Telescope observations. A "Type I" spicule with a 3-7-minute lifetime undergoes a cycle of upward and downward motions; by contrast, a "Type II" spicule fades away within dozens of seconds without a descending phase. We are motivated by the fact that for a spicule with complicated three-dimensional motion the space-time plot, which is made through a slit on a fixed position, could not match the spicule behavior all the time and might lose its real life story. By revisiting the same data sets, we identify and trace 105 and 102 spicules in the quiet Sun (QS) and coronal hole (CH), respectively, and obtain their statistical dynamic properties. First, we have not found a single convincing example of "Type II" spicules. Second, more than 60% of the identified spicules in each region show a complete cycle, i.e., the majority are "Type I" spicules. Third, the lifetimes of the spicules in the QS and CH are 148 s and 112 s, respectively, but there is no fundamental lifetime difference between the spicules in the QS and CH reported earlier. Therefore, the suggestion of coronal heating by "Type II" spicules should be taken with caution.
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]	HIGH-RESOLUTION OBSERVATIONS ; OPTICAL TELESCOPE ; MAGNETIC-FIELDS ; ALFVEN WAVES ; HINODE ; LIMB ; MACROSPICULES ; CHROMOSPHERE ; WIND ; FLUX
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/750/1/16/meta
语种	英语
WOS记录号	WOS:000303063500016
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7186]
专题	云南天文台_选址与日冕观测组
作者单位	1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2.Kwasan and Hida Observatory, Kyoto University, Kamitakara, Gifu 506-1314, Japan 3.Department of Astronomy, Beijing Normal University, Beijing 100875, China 4.Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan 5.Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Zhang, YZ,Shibata, K,Wang, JX,et al. REVISION OF SOLAR SPICULE CLASSIFICATION[J]. ASTROPHYSICAL JOURNAL,2012,750(1).
APA	Zhang, YZ.,Shibata, K.,Wang, JX.,Mao, XJ.,Matsumoto, T.,...&Su, JT.(2012).REVISION OF SOLAR SPICULE CLASSIFICATION.ASTROPHYSICAL JOURNAL,750(1).
MLA	Zhang, YZ,et al."REVISION OF SOLAR SPICULE CLASSIFICATION".ASTROPHYSICAL JOURNAL 750.1(2012).