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Qi-Jun Fu Yi-Hua Yan Yu-Ying Liu Min Wang Shu-Juan WangNational Astronomical Observatories Chinese Academy of Sciences Beijing fuqijun@sohu.com 《中国天文和天体物理学报》2004,4(2):176-188
The 2.6-3.8 GHz, 4.5-7.5 GHz, 5.2-7.6 GHz and 0.7-1.5 GHz component spectrometers of Solar Broadband Radio Spectrometer (SBRS) started routine observations, respectively, in late August 1996, August 1999, August 1999, and June 2000. They just managed to catch the coming 23rd solar active maximum. Consequently, a large amount of microwave burst data with high temporal and high spectral resolution and high sensitivity were obtained. A variety of fine structures (FS) superimposed on microwave bursts have been found. Some of them are known, such as microwave type Ⅲ bursts, microwave spike emission, but these were observed with more detail; some are new. Reported for the first time here are microwave type U bursts with similar spectral morphology to those in decimetric and metric wavelengths, and with outstanding characteristics such as very short durations (tens to hundreds ms), narrow bandwidths, higher frequency drift rates and higher degrees of polarization. Type N and type M bursts were also observed. Detailed zebra pattern and fiber bursts at the high frequency were found. Drifting pulsation structure (DPS) phenomena closely associated with CME are considered to manifest the initial phase of the CME, and quasi-periodic pulsation with periods of tens ms have been recorded. Microwave “patches”, unlike those reported previously, were observed with very short durations (about 300ms), very high flux densities (up to 1000 sfu), very high polarization (about 100% RCP), extremely narrow bandwidths (about 5%), and very high spectral indexes. These cannot be interpreted with the gyrosynchrotron process. A superfine structure in the form of microwave FS (ZPS,type U), consisting of microwave millisecond spike emission (MMS), was also found. 相似文献
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Cheng-Ming Tan Qi-Jun Fu Yi-Hua Yan Yu-Ying Liu National Astronomical Observatories Chinese Academy of Sciences Beijing 《中国天文和天体物理学报》2004,4(3):205-208
A series of solar radio bursts were observed in AR NOAA 10486 withthe Solar Broadband (1.1--7.6 GHz) Radio Spectrometers (SBRS of China). Here weanalyze four significant events associated with CME events and strong X-ray flaresthat occurred on 2003 October 22, 26, 27, 29. The Oct. 26 event is a long durationevent (LDE) with drift pulsation structure (DPS), narrowband dm-burst (DCIM),and more than seven types of Fine Structures (FSs); its time of the maximum flux(07:30 UT) is about half an hour later than the X-flare (06:54 UT). 相似文献
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Rui-XiangXie MinWang Yi-HuaYan 《中国天文和天体物理学报》2005,5(1):87-98
A rare Type I-like noise storm was observed with the solar radio spectrometers (1.0-2.0 GHz and 2.60-3.8 GHz) at National Astronomical Observatories of China (NAOC) on September 23, 1998. We concentrate on checking the Type I-like noise storm occurred in the decay phase of a Type IV radio burst. This noise storm consists of many Type I bursts and isolated Type Ⅲ or Type Ⅲ pair bursts. It has a bandwidth of ≤ 0.5 GHz. The duration of each Type Ⅰ burst is of the order of 100-300ms. The total duration is greater than 11 minutes. The circular polarization degree of the components of Type Ⅰ and associated Type Ⅲ bursts are about 40%-100% and almost 100%, respectively, which is greater than that of the background continuum (nearly the precision of our instrument). This short decimetric Type I-like storm may be another kind or the extension of the kind of metric Type Ⅰ storm, and may possess the duality of metric and decimetric radio emission. It may be in favor of an earlier emission mechanism of the fundamental plasma radiation due to the coalescence of Langmuir waves with low-frequency waves. 相似文献
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小秦岭金矿田韧性剪切带特征及与金矿成矿的关系 总被引：2，自引：1，他引：2
根据韧性剪切带的形成时代、运动方式，发育特征，将小秦岭金矿田的韧性剪切带划分为三期，分别从野外地质，显微构造，岩组学等方面研究了它们的基本特征，并探讨了它们与金成矿之间的关系，提出了一个多期韧性剪性带和脆性剪切带叠加的控矿模式。 相似文献
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