类星体

Based upon our first paper and continuing the "Standard candle" classification by use of the component linear distance D, we attain to the following statistical correlation of some type of Quasars with largest angular diameter Q_: the correla- tion between visual magnitude and redshift; the correlation between its absolute magnitude, radio-luminosity of single frequency, integral radio Iuminosity, colour in- dex difference Q and D.

本文在第I部分的基础上，继续用类星体射电子源线距D进行"标准烛光"分类，经过统计分析，得到了子源角径最大的一类类星体的一些统计规律：它的视星等与红移之间，它的绝对星等、单频射电光度、积分射电光度和色指数差Q与D之间有很好的相关性等。

We present semi-analytic models and Monte-Carlo simulations of QSO Lyman α absorption line systems...

本文结合星系形成理论，研究了低红移的类星体吸收线系统的起源与性质。

Keywords: quasar absorption line systems; semi-analytical models; galaxy formation; simulations

中文关键词：类星体吸收线系统；半解析模型；星系形成；数值模拟

To assess the importance of quasar outflow we have performed a series of studies on broad absorption line quasars, and have obtained the following results.

为了确定外流的重要性，中国科学技术大学天体物理中心开展了宽吸收线类星体的一系列研究，取得了一些进展：(1)宽吸收线区的紫外吸收物质的柱密度比原来预计高出2个量级，低电离吸收线形成于饱和的高电离吸收线区；(2)射电宁静的宽吸收类星体吸收物质主要在赤道面，并且不同的源吸收物质分布情况很不相同，而在射电强的类星体中，赤道和极向外流都是可能的；(3)共振散射线偏振表明，外流物质携带角动量。

Bao. I think he does not know the : quasar physics at all!: A simple reason: astronomers detected redshifts of quasars based on the spectr : al lines emitted from the emission line regions, which are 0.1 to 1 parsec (1p : arsec=3.26 light years) far away from the central black hole. Therefore there : is very little effect from the gravitational redshift!

观察到的类星体的光可在几日内有明显的变化，可见类星体的发光区大小在光日尺度以下，即使你认为类星体的光谱线产生于吸积盘，那么吸积盘的大小须在光日尺度以下才能不相矛盾，请你说出一个你认定的类星体吸积盘的大小尺度与该尺度内所具有的质量，及因此计算出的可忽略的引力红移。

Their association with the quasar is therefore strong evidence that this is the object that created them.

因此存在于类星体中的事实为类星体创造了它们提供了强有力的证据。

A test will come soon: Starting this fall, Princeton astronomer Michael Strauss and his SDSS partners will use the Hubble Space Telescope to examine dozens of quasars, including their four most distant ones, for multiple images--the signpost of a lensed quasar.

然而，今年秋天普林斯顿大学的天文学家Michael Strauss和他SDSS的搭档们将进行一项尝试：使用哈勃太空望远镜来研究众多的类星体，包括他们发现的最遥远的四个，获取它们的多重图象--这是受引力透镜影响的类星体的重要标志。

It is important to understand the nature of quasars from their multi-wave information.

对类星体进行多波段的观测和研究，是了解类星体本质的一个重要途径。

The discovery suggests that quasars created at least some galaxies, and perhaps not the other way around.

该发现表明，类星体至少创造了某些星系，或许并不是星系创造了类星体。

We summarize the observational and theoretical studies of quasars, and present the results of our studies on the Doppler redshifts of quasars.

本文综述类星体的观测和理论研究现状，详细介绍本人在攻读博士学位期间在类星体多谱勒红移方面的研究工作。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了