aquasiperiodicsolarradiofluctuationatmicrowaveband

	aquasiperiodicsolarradiofluctuationatmicrowaveband
	XU FuYing; HUANG GuangLi; WU HongAo
刊名	chinesephysicsletters
	2005
卷号	22 期号:12 页码:3229
ISSN号	0256-307X
英文摘要	A rare but interesting solar radio fine structure, quasi-periodic fluctuations, on 25 August 1999 was observed at microwave band for the first time. They fluctuated initially at a nearly stable frequency level then at a reverse drift component up to 5.49 GHz. The individual fluctuation consists of a bi-directional drift component. The features are characterized by narrow bandwidth of Delta f/f <= 3%, quasi-periodicity of similar to 100 ms as well as a slowly reverse and a rapidly normal drift rates on the bi-directional drift component. The associated data of the Yohkoh soft and hard x-ray telescope and Nobeyama radio heliograph at 17GHz showed that there are several bright spots (i.e. inhomogeneities) along the soft x-ray loop, and the locations of both radio and soft x-ray sources are closely consistent. Therefore, the fluctuations are most likely caused by the inhomogeneities within a Bare loop. Based on the two-component atmospheric model, we suggest a three-component atmospheric model with large scale length lambda and small scale lengths lambda(1) and lambda(2) to describe equilibrium atmosphere and inhomogeneity, With the beam model, the characters of fluctuations may be interpreted reasonably by the quasi-equidistant inhomogeneity along a Rare loop.
语种	英语
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/29230]
专题	中国科学院紫金山天文台
作者单位	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	XU FuYing,HUANG GuangLi,WU HongAo. aquasiperiodicsolarradiofluctuationatmicrowaveband[J]. chinesephysicsletters,2005,22(12):3229.
APA	XU FuYing,HUANG GuangLi,&WU HongAo.(2005).aquasiperiodicsolarradiofluctuationatmicrowaveband.chinesephysicsletters,22(12),3229.
MLA	XU FuYing,et al."aquasiperiodicsolarradiofluctuationatmicrowaveband".chinesephysicsletters 22.12(2005):3229.