三个不动中心问题的一个三维解

本文对三个不动中心问题的平面解作进一步发展，通过对三个不动中心在四维空间中的定义得到三个不动中心问题的三维解．     

光引力限制性三体问题的平动点

本文研究两个主星体的质量缩减因子ｑ＿，ｑ＿２∈（－∞，１］的光引力限制性三体问题。文中给出一种平动点的个数估计和位置计算的分析方法。结果表明对于不同的ｑ＿１和ｑ＿２可有１～７个平动点。作为应用，文末还讨论了太阳系类似彗尾尘埃物质的运动。     

A THREE-DIMENSIONAL SOLUTION OF THE PROBLEM OF THREE FIXED CENTRES

ＡＴＨＲＥＥ－ＤＩＭＥＮＳＩＯＮＡＬＳＯＬＵＴＩＯＮＯＦＴＨＥＰＲＯＢＬＥＭＯＦＴＨＲＥＥＦＩＸＥＤＣＥＮＴＲＥＳ￥ＱｉｎＹｉｐｉｎｇ（覃一平）ＮｉｅＺｈａｏｍｉｎｇ（聂昭明）（ＹｕｎｎａｎＯｂｓｅｒｖａｔｏｒｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｋｕｎ...     

从两个SDSS类星体能谱中证认出Ca Ⅱ吸收线系统(英文)

文章给出在两个SDSS类星体能谱中证认出的重金属吸收系统.对每一个吸收系统,作者探测到10个明显的重金属吸收线.这两个吸收体的红移明显小于相应类星体的红移(zabs≤ze).因此,这两个重金属吸收系统极可能与在相应类星体的视线方向上的插入星系有关.     

广州大学物理实验教学模式改革的研究与实践

总结了广州大学物理实验教学模式改革的思路及方案,实验教学体系建设,实验教学方法和手段,教学过程、内容和考核方式等实践过程中的经验和体会.阐述了实验课程定位与建设理念,探讨了实验教学方法的创新,介绍了教学改革所取得成果.     

The libration points in photogravitational restricted three-body problem

ＴＨＥＬＩＢＲＡＴＩＯＮＰＯＩＮＴＳＩＮＰＨＯＴＯＧＲＡＶＩＴＡＴＩＯＮＡＬＲＥＳＴＲＩＣＴＥＤＴＨＲＥＥ－ＢＯＤＹＰＲＯＢＬＥＭＺｈｅｎｇＸｕｅ－ｔａｎｇ（郑学塘）ＹｕＬｉ－ｚｈｏｎｇ（郁丽忠）（Ｄｅｐｔ．ｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ,Ｎａｎｊ...     

Supplement to the previous application of the first junction condition to a highly symmetric spacetime

Application of the first junction condition to a highly symmetric spacetime was investigated recently in {\it Chin. Phys. Lett.} B {\bf 546} 189 2006, where a partial differential equation arising from the connection of the Robertson--Walker and the Schwarzschild--de Sitter metrics was presented, but no solutions of the equation were provided. Here we provide a proof to the statement that there exist solutions of the equation. In addition, an example of the solution and some analyses associated with this issue are presented. We find that in connecting the two metrics, there are three conditions which should be satisfied. Of these conditions, one condition constrains the place where the two metrics can take the same value for a local system whose mass is provided which marks the boundary of the system, and the other two constrain the transformation form. In realizing the connection of the two metrics, the latter two conditions are required to be satisfied only at the boundary defined by the former condition.     

曲率效应导致的伽马暴高能尾

根据"曲率效应",预言伽马暴随动谱中高能端的一根发射线可以形成观测谱中的一个翘起的高能尾.这解释了为什么从来没有在伽马暴中观测到窄发射线.翘尾的峰是洛仑兹因子的线性函数.这表明,当该发射线被证认时,翘尾峰可成为火球膨胀速度的指示器.     

广州大学天文教育和学科的发展

介绍了广州大学天文学教育及天体物理学科建设的发展现状.包括天体物理选修课和科普教育的情况,以及天体物理广东省重点学科与天文观测和技术广东省教育厅重点实验室的建设.     

A cosmological model with negative energy photons

According to recent investigations of states of quantum fields, we postulate that there exist negative energy photons in the universe. With this assumption, we find a solution of Einstein's equation without introducing the cosmological constant. A new and sizable type Ia supernovae sample is employed to perform a fit with our model and the conventional model. Both models can well account for the current type Ia supernovae observation and they are not distinguishable. With the new model, the cause of the accelerated expansion of the universe and the mechanism of the negative pressure existing in outer space can be explained in ordinary physical terms.