高维Reissner—Nordstroem时空中的整体正规解

本探讨了高维Reissner-Nordstroem时空中的整体正规解。这个度规具有高维Reissner-Nordstroem度规同样的视界，而在r＝0处无奇性。     

高维de Sitter时空背景中动态黑洞的度规

在高维de Sitter时空背景中给出了动态黑洞的度规,这是著名的Vaidya度规和Bonner-Vaidya度维在高维时空中的推广。     

视超光速运动的相对论超光速模型

从相对论出发，在视超光速源质心相对于观测静止的条件下，推导出两个向相反方向运动的视超光速子源之间的视速度方程，这一方程包含了相对论射束模型的表观横向速度公式，且对高，低速不同条件均为适用。     

超新星在宇宙学中的应用

对Ｉａ超新星在宇宙学中的应用作了述评。蓝Ｉａ超新星具有相对均匀的光谱、光变曲线及峰值光度,是较好的相对距离指示器。利用峰值光度同光变曲线形状或其它与距离无关的可观测量的关系可进一步将Ｉａ超新星校准成精确的距离指示器。一旦它们的绝对光度得到标定,就可以定出哈勃常数Ｈ０。基于对邻近星系Ｉａ超新星的理解,高红移Ｉａ超新星的数据可对宇宙密度参数ΩＭ、ΩＶ及减速因子ｑ０作出限制,并对膨胀宇宙的最终命运作出判     

Nonlinear density fluctuation field theory for large scale structure

We develop an effective field theory of density fluctuations for a Newtonian self-gravitating N-body system in quasi-equilibrium and apply it to a homogeneous uni-verse with small density fluctuations. Keeping the density fluctuations up to second or-der, we obtain the nonlinear field equation of 2-pt correlation ξ(r), which contains 3-pt correlation and formal ultra-violet divergences. By the Groth-Peebles hierarchical ansatz and mass renormalization, the equation becomes closed with two new terms beyond the Gaussian approximation, and their coefficients are taken as parameters. The analytic solu-tion is obtained in terms of the hypergeometric functions, which is checked numerically.With one single set of two fixed parameters, the correlation ξ(r) and the corresponding power spectrum P(k) simultaneously match the results from all the major surveys, such as APM, SDSS, 2dfGRS, and REFLEX. The model gives a unifying understanding of several seemingly unrelated features of large scale structure from a field-theoretical per-spective. The theory is worth extending to study the evolution effects in an expanding universe.     

河外超脉泽辐射

本文给出了新近才发现的超咏泽的主要观测结果。对超脉泽形态、形成的物理环境、辐射机制等方面研究作了简要评述。提出一些值得进一步探讨的问题.     

Distribution of 56↑Ni Yields of Type Ia Supernovae and its Implication for Progenitors

The amount of 56↑Ni produced in Type Ia supernova （SN Ia） explosion is probably the most important physical parameter underlying the observed correlation of SN Ia luminosities with their light curves. Based on an empirical relation between the 56↑Ni mass and the light curve parameter △m15, we obtained rough estimates of the 56↑Ni mass for a large sample of nearby SNe Ia with the aim of exploring the diversity in SN Ia. We found that the derived 56↑Ni masses for different SNe Ia could vary by a factor of ten （e.g., MNi = 0.1 - 1.3 M⊙）, which cannot be explained in terms of the standard Chandrasekhar-mass model （with a 56↑Ni mass production of 0.4 - 0.8 M⊙）. Different explosion and/or progenitor models are clearly required for various SNe Ia, in particular, for those extremely nickel-poor and nickel-rich producers. The nickel-rich （with MNi 〉 0.8 M⊙） SNe Ia are very luminous and may have massive progenitors exceeding the Chandrasekhar-mass limit since extra progenitor fuel is required to produce more 56↑Ni to power the light curve. This is also consistent with the finding that the intrinsically bright SNe Ia prefer to occur in stellar environments of young and massive stars. For example, 75% SNe Ia in spirals have △ml5 〈 1.2 while this ratio is only 18% in E/S0 galaxies. The nickel-poor SNe Ia （with MNi 〈 0.2 M⊙） may invoke the sub- Chandrasekhar model, as most of them were found in early-type E/S0 galaxies dominated by the older and low-mass stellar populations. This indicates that SNe Ia in spiral and E/S0 galaxies have progenitors of different properties.     

射电源0420—014,1334—127和2345—167中的视超光速运动

本文叙述南天区５ＧＨｚＶＬＢＩ普查中新发现的视超光速射电源，０４２０－０１４，１３３４－１２７和２３４５－１６７，这些结果尚待进一步的观测加以证实。     

视超光速候选源0208-512和2243-123

本文叙述南天区５ＧＨｚＶＬＢＩ普查的第二轮观测中所发现的视超光速候选源,０２０８－５１２和２２４３－１２３,这些结果尚待进一步的观测加以证实．     

视超光速候选源0208—512和2243—123

本叙述南天区５ＧＨｚＶＬＢＩ普查的第二轮观测中所发现的视超光速候选源,０２０８－５１２和２２４３－１２３,这些结果尚待进一步的观测加以证实。     

密近双星自转的测量和研究（IV）实测与两种理论指标值比较

本讨论了对早型星适用的密近双星子星自转同步化理论，Ｚａｈｎ的动力学潮汐机制，Ｔａｓｓｏｕｌ的纯流体动力学理论与实测数据及统计性质的符合程度，对（Ⅲ）中的３９个不相接双星子星，均分别计算出两种理论所预期的同步时标，估计了样本星的年龄，并分析，比较了各样本星的理论同步时标与年龄，以及自转同步性与它们之间的关系，结果表明，对大多数样本，动力学潮汐同步理论的计算结果与实测一致；而纯流体动力学同步机制预     

射电源0420—014,1334—127和2345—167中的视超光速运动

本文叙述南天区 5GHzVLBI普查中新发现的视超光速射电源 ,0 4 2 0— 0 1 4,1 334—1 2 7和 2 345— 1 67,这些结果尚待进一步的观测加以证实     

矩尺天区的近红外天体

利用Ｒ（红）－Ⅰ（近红外）两色照相测光方法，搜寻银道整天区的红外超天体，并证认ＩＲＡＳ点源的红外超对应体。本是一组系列章的第四篇。在矩尺天区发现了１９５个红外超天体，并证认出其中２２个是ＩＲＡＳ点源的对应体。     

视超光速源的统计分析

本文收集了视超光速源样本的有关观测数据，在同步加速自康普顿散射机制下导出了各源的多普勒因子，再利用视超光速源的相对论射束模型计算样本源的有关物理量，如射电光度和亮温度，并与它们的观测值作直接的比较，得到较好的相关结果。这些结果支持了活动星系核中具有相对论射束运动的假设。同时我们比较了样本源的射电、光学、Ｘ射线的发现它们之间有一定的相关性，说明在不同波段上的辐射机制可能存在某种联系。     

南天区20个河外射电源的VLBI研究

本报道南天区５ＧＨｚ普查式观测结果，首次观测是在１９９２年１１月期间进行的，共观测２３个河外射电源，获得了２０个河外射电源的ＶＬＢＩ高分辨率的射电图象，有１５个射电源呈现核喷流结构，１个有双向喷流，３个未分解，未发现有致密双源，在１６个核喷流（包括一个双向喷流源）源中有１１个呈现弯曲喷流现象。此外还首次发现了３个源中可能有超光速运动现象。