Diagnostics of Ellerman bombs with high-resolution spectral data

	Diagnostics of Ellerman bombs with high-resolution spectral data
	Li, Z1,2,3 ; Fang, C 1,2,3; Guo, Y 1,2,3; Chen, PF 1,2,3; Xu Z(徐稚)4 ; Cao, WD5
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2015-09
卷号	15 期号:9 页码:1513-1524
关键词	Sun: chromosphere Sun: photosphere line profiles magnetic reconnection
ISSN号	1674-4527
通讯作者	Li, Z (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China.
产权排序	第四完成单位
英文摘要	Ellerman bombs (EBs) are tiny brightenings often observed near sunspots. The most impressive characteristic of EB spectra is the two emission bumps in both wings of the H alpha and Ca II 8542 angstrom lines. High-resolution spectral data of three small EBs were obtained on 2013 June 6 with the largest solar telescope, the 1.6 m New Solar Telescope at the Big Bear Solar Observatory. The characteristics of these EBs are analyzed. The sizes of the EBs are in the range of 0.3'' - 0.8'' and their durations are only 3-5 min. Our semi-empirical atmospheric models indicate that the heating occurs around the temperature minimum region with a temperature increase of 2700-3000 K, which is surprisingly higher than previously thought. The radiative and kinetic energies are estimated to be as high as 5 x 10(25) - 3.0 x 10(26) erg despite the small size of these EBs. Observations of the magnetic field show that the EBs just appeared in a parasitic region with mixed polarities and were accompanied by mass motions. Nonlinear force-free field extrapolation reveals that the three EBs are connected with a series of magnetic field lines associated with bald patches, which strongly implies that these EBs should be produced by magnetic reconnection in the solar lower atmosphere. According to the lightcurves and the estimated magnetic reconnection rate, we propose that there is a three phase process in EBs: pre-heating, flaring and cooling phases.
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]	H-ALPHA ; MAGNETIC RECONNECTION ; NUMERICAL SIMULATIONS ; SOLAR TELESCOPE ; MOUSTACHES ; FIELDS ; MODEL ; RECONSTRUCTION ; ATMOSPHERE ; EMERGENCE
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/1674-4527/15/9/008/meta
语种	英语
WOS记录号	WOS:000360555100008
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4713]
专题	云南天文台_抚仙湖太阳观测站
作者单位	1.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China 2.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China 3.Collaborative Innovation Center of Modern Astronomy and Space Exploration, Nanjing 210093, China 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 620011, China 5.Big Bear Solar Observatory, New Jersey Institute of Technology, 40386 North Shore Lane, Big Bear City, CA 92314, USA
推荐引用方式 GB/T 7714	Li, Z,Fang, C,Guo, Y,et al. Diagnostics of Ellerman bombs with high-resolution spectral data[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(9):1513-1524.
APA	Li, Z,Fang, C,Guo, Y,Chen, PF,Xu Z,&Cao, WD.(2015).Diagnostics of Ellerman bombs with high-resolution spectral data.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(9),1513-1524.
MLA	Li, Z,et al."Diagnostics of Ellerman bombs with high-resolution spectral data".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.9(2015):1513-1524.