Qualitative Theory for Lensed QSOs
Qualitative Theory for Lensed QSOs
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DOI：
10.1086/375204
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发表时间：
2003-03
期刊：
影响因子：
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通讯作者：
P. Saha;L. Williams
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文献类型：
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作者：
P. Saha;L. Williams
我们表明，多重成像 QSO 系统的一些特征与模型非常无关，并且可以通过简单地检查图像和星系/透镜中心的相对位置来准确地推断出来。这些包括图像的时间顺序、透镜电位的方向以及任何环的粗略形态。其他功能在特定型号之间可能存在很大差异； H0 就是一个例子。令人惊讶的是，从圆对称透镜系统继承的特性与模型相关，而由于圆对称性破缺而产生的特征与模型无关。我们首先从一些抽象的几何概念中得出这些结果，然后用一些著名的系统（四元组 Q2237+030、H1413+117、HST 14113+5211、PG 1115+080、MG 0414+0534、B1608+656、B1422+231 和 RX J0911+0551）来说明它们和 10 图像系统 B1933+507），最后评论两个系统（B1359+154 和 PMN J0134-0931），其中透镜属性更复杂。我们还介绍了一个 Java 小程序，它可以生成简单的透镜系统并有助于进一步说明这些概念。
We show that some characteristics of multiply imaged QSO systems are very model independent and can be deduced accurately by simply scrutinizing the relative positions of images and galaxy/lens center. These include the time-ordering of the images, the orientation of the lens potential, and the rough morphology of any ring. Other features can differ considerably between specific models; H0 is an example. Surprisingly, properties inherited from a circularly symmetric lens system are model dependent, whereas features that arise from the breaking of circular symmetry are model independent. We first develop these results from some abstract geometric ideas, then illustrate them for some well-known systems (the quadruples Q2237+030, H1413+117, HST 14113+5211, PG 1115+080, MG 0414+0534, B1608+656, B1422+231, and RX J0911+0551 and the 10-image system B1933+507), and finally remark on two systems (B1359+154 and PMN J0134-0931) where the lens properties are more complex. We also introduce a Java applet that produces simple lens systems and helps further illustrate the concepts.