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为了更加准确地判断X级耀斑是否引发质子事件,对X级质子耀斑和非质子耀斑的耀斑积分通量、源区、CME速度、CME角宽度、背景太阳风速度及背景X射线通量的分布进行了统计研究.发现非质子耀斑和质子耀斑的积分通量、经度、CME速度和CME角宽度具有明显不同的分布.非质子耀斑大多集中在东部,耀斑积分通量小于0.3J·m-2,CME速度小于1300km·s-1的区域内;质子耀斑大多集中在中部或西部,耀斑积分通...
Recent developments in cosmochemistry of high-precision and high spatial resolution isotope analyses, and of high-performance computing techniques, have enabled cosmochemists to gain vital insight ...
简要回顾利用“日地关系天文台”(SolarTerrestrialRelationsObservatory,STEREO)卫星的立体观测资料在日冕物质抛射fCoronalMassEjection,CME)研究方面已取得的一些重要进展,主要包括:(1)通过极紫外成像仪观测到的日冕极紫外暗化来更准确地估计CME质量,研究CME演化的结构特征;(2)利用STEREO卫星日冕仪的双角度观测,在CME立体传播...
We use three-dimensional hydrodynamical simulations to study the rapid infall phase of the common envelope interaction of a red giant branch star of mass equal to 0.88 \msun and a companion star of ma...
A comprehensive search for variable and transient radio sources has been conducted using ~55,000 snapshot images of the FIRST survey. We present an analysis leading to the discovery of 1,627 variable ...
Transition properties such as oscillator strengths, transition rates, branching ratios and lifetimes of many low-lying states in the doubly ionized scandium (Sc III) are reported. A relativistic metho...
We investigate NLTE effects for magnesium and calcium in the atmospheres of late-type giant and supergiant stars. The aim of this paper is to provide a grid of NLTE/LTE equivalent width ratios W/W* of...
利用太阳分光光度计(CE-318)对杭州市地面的气溶胶光学特性进行观测,并对卫星反演的中分辨率成像光谱仪(Moderate Resolution Imaging Spectroradiometer,MODIS)气溶胶产品进行验证.结果表明,MODIS气溶胶产品在杭州地区的精度较高,3个站点全部数据回归曲线的斜率和截距分别为1.02和-0.14(RSME=0.22,R2=0.71).在此基础上,利用...
Exactly eighty years ago, a very young Yehudi Menuhin was invited by Bruno Walter to perform Beethoven's violin concerto with the Berlin Philharmonic Orchestra. Walking through the streets of Berlin h...
In this paper we examine the profiles of the complex Na I D-lines in the Red Rectangle. The spectra were acquired with the ARCES \'{e}chelle spectrograph R = 38,000 on the 3.5-m telescope at the Apach...
The Ursa Major group is a nearby stellar supercluster which, while not gravitationally bound, is defined by co-moving members. DD UMa is a $\delta$ Scuti star whose membership in the Ursa Major group ...
We have analyzed Cs-137 decay data, obtained from a small sample onboard the MESSENGER spacecraft en route to Mercury, with the aim of setting limits on a possible correlation between nuclear decay ra...
We present 4 model series of the CODEX dynamical opacity-sampling models of Mira variables with solar abundances, designed to have parameters similar to $o$ Cet, R Leo and R Cas. We demonstrate that t...
The Solar Dynamics Observatory (SDO) was launched in February 2010 and is now providing an unprecedented view of the solar activity at high spatial resolution and high cadence covering a broad range o...
In cool stars that oscillate like the Sun, non-radial modes become mixed as the stars evolve. The mixing is caused by the coupling between g-modes in the stellar core and p-modes in the envelope, whic...

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