Microwave type III bursts and pulsation groups

	Microwave type III bursts and pulsation groups
	Ning, Z ; Ding, MD ; Wu, HA ; Xu, FY ; Meng, X
刊名	ASTRONOMY & ASTROPHYSICS
	2005-07-01
卷号	437 期号:2 页码:691-697
关键词	Sun : radio radiation
ISSN号	0004-6361
英文摘要	We analyse 22 continuous microwave reverse slope (RS) type III and 21 microwave pulsation groups observed by the Purple Mountain Observatory (PMO) spectrometer over the frequency range of 4.5-7.5 GHz from 1999-2003. The RS type III groups have an average of 12 bursts per group, a mean duration of 0.1-2 s around 6 GHz, a mean quasi-period of 2.0 +/- 0.6 s and a mean drift rate of 7.0 GHz s(-1). The shortest quasi-period is measurable down to 0.05 s thanks to the high time resolution of this instrument. The microwave pulsation groups have an average of 22 events per group, a mean duration of 3-4 s and a mean quasi-period of 3.7 +/- 1.1 s. The RS type III bursts have the same quasi-period as the upward type III bursts documented before. We discuss two possible origins of the quasi-periodicity of type III bursts. One is the quasi-periodic process in magnetic reconnection at the same site, and the other is spatially unresolved stochastic processes in solar flares.
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]	PERIOD NETWORK OSCILLATIONS ; SOLAR-FLARE ; EXPLOSIVE EVENTS ; MAGNETIC RECONNECTION ; TRANSITION REGION ; ELECTRON-BEAMS ; ACCELERATION ; WAVES ; JETS ; SUN
收录类别	SCI
语种	英语
WOS记录号	WOS:000229978400031
公开日期	2012-03-07
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/4090]
专题	紫金山天文台_南极天文中心
作者单位	1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 2.Purple Mt Observ, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Ning, Z,Ding, MD,Wu, HA,et al. Microwave type III bursts and pulsation groups[J]. ASTRONOMY & ASTROPHYSICS,2005,437(2):691-697.
APA	Ning, Z,Ding, MD,Wu, HA,Xu, FY,&Meng, X.(2005).Microwave type III bursts and pulsation groups.ASTRONOMY & ASTROPHYSICS,437(2),691-697.
MLA	Ning, Z,et al."Microwave type III bursts and pulsation groups".ASTRONOMY & ASTROPHYSICS 437.2(2005):691-697.