Characteristics of radio spikes as solar microflares at short decimetric wavelength

	Characteristics of radio spikes as solar microflares at short decimetric wavelength
	Xie RX(谢瑞祥)1 ; Wang M(汪敏)1 ; Fu, QJ 2; Li, W 2
刊名	ASTRONOMY & ASTROPHYSICS
	2002-11
卷号	395 期号:1 页码:243-247
关键词	Sun : flares Sun : radio radiation Sun : magnetic fields Sun : sunspots
ISSN号	0004-6361
通讯作者	Xie, RX (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	A rare type of radio spike occurred on January 5, 1994 at short decimetric wavelength (1.42 GHz), and was observed with the Yunnan Observatory high time resolution (1 ms) radio telescope. The radio and optical characteristics of the spikes as radio microflares are presented. This event contains 53 radio millisecond spikes, and shows an intermittently periodic pulse train superimposed on the radio continuum background. Two newly emerging small sunspot groups with complex polarities were observed. The magnetic field strength of the source and the irradiated spike energies are estimated by using the radio observations. During a single spike, less than or equal to10(23) ergs may have been transferred to nonthermal electrons, and thus radio spikes may reflect microflare class activity. We discuss the generation mechanism of the radio microflares qualitatively. Our results favour the explosive coalescence model of the multiple magnetic flux loops, leading simultaneously to acceleration of electrons and heating.
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]	X-RAY-EMISSION ; FLARES ; FRAGMENTATION ; BRIGHTENINGS ; COALESCENCE ; MODEL ; JUNE
收录类别	SCI ; EI
原文出处	http://www.aanda.org/articles/aa/abs/2002/43/aa1802/aa1802.html
语种	英语
WOS记录号	WOS:000179048000029
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5601]
专题	云南天文台_射电天文研究组
作者单位	1.Yunnan Observatory, National Astronomical Observatories, CAS, Kunming 650011, PR China 2.National Astronomical Observatories, CAS, Beijing 100012, PR China
推荐引用方式 GB/T 7714	Xie RX,Wang M,Fu, QJ,et al. Characteristics of radio spikes as solar microflares at short decimetric wavelength[J]. ASTRONOMY & ASTROPHYSICS,2002,395(1):243-247.
APA	Xie RX,Wang M,Fu, QJ,&Li, W.(2002).Characteristics of radio spikes as solar microflares at short decimetric wavelength.ASTRONOMY & ASTROPHYSICS,395(1),243-247.
MLA	Xie RX,et al."Characteristics of radio spikes as solar microflares at short decimetric wavelength".ASTRONOMY & ASTROPHYSICS 395.1(2002):243-247.