Numerical Simulations and Observations of Radio Galaxies

这是对河外射电源的数值模拟和观测的一个研究项目的延续。本研究的主题是研究扩展射电等离子体与周围介质之间的相互作用。在数值上，MHD代码ZEUS的能力将显著扩展到三维操作。这个代码将用于研究射电喷流在二维和三维的传播在各种星系和星系团的大气。特别是，高超声速射流约束的流体动力学机制将被研究。射流在冷却流簇中的破坏也将被分析，以及与尾射源相关的射电射流的弯曲和破坏。在观测方面，将制作半人马座A在8 GHz和0.3 GHz波段的中部和内瓣区域以及特殊的经典双星0816+526的新VLA图像。调查工作将包括调查富星系团中cD星系的性质，观察选定的x射线星系团和富南部星系团，以及发光3CR射电星系样本的高动态范围映射。

This is a continuation of a research program involving numerical simulations and observations of extragalactic radio sources. The theme of this research is to study the interaction between ex- tended radio plasma the surrounding medium. Numerically, the capabilities of the MHD code ZEUS will be significantly extended to operate in three dimensions. This code will be used to study the propagation of radio jets in both two and three dimensions in a variety of galaxy and cluster atmospheres. In particular, a hydrodynamical mechanism for the confinement of hypersonic jets will be studied. The disruption of jets in cooling flow clusters will also be analyzed, as well as the bending and disruption of radio jets associated with tailed radio sources. Observational- ly, new VLA images of the middle and inner lobe regions of Cen- taurus A at 8 and 0.3 GHz and of the peculiar classical double 0816+526 will be made. Survey work will include an investigation of the properties of cD galaxies in rich clusters, observations of selected x-ray clusters and rich southern clusters, and high dynamic range mapping of a sample of luminous 3CR radio galaxies.