扩展射电源中形态的成因：X形、离轴畸变和巨型射电源
The genesis of morphologies in extended radio sources: X-shapes, off-axis distortions and giant radio sources
摘要：
我们研究双射电源的形态和无线电光学位置角偏移-相对于主星系的主轴的无线电轴的相对取向之间的关系。这项研究是对射电源的代表性样本：附近（红移z < 0.5）的3CRR源，以及分别对巨射电源和X形射电源的样本进行的。我们发现，无线电形态特征依赖于无线电-光学位置角偏移和源是长轴源还是短轴源。证据表明，一个各向异性的星系环境，与宿主星系的椭圆率，导致源的线性大小的演变，在射电叶，离轴波瓣扭曲和翅膀和X形射电源的形成回流的强度取决于无线电光学位置角偏移。我们确定了一类X形的射电源，这是要么边缘变暗或缺乏热点，似乎有内部双打表明重新启动的活动。我们建议一个共同的形成机制，需要回流，这些显然FR-I X形射电源以及边缘增亮的X形源。
英文摘要：
We examine relationships between the morphology in double radio sources and the radio-optical position angle offset--the relative orientation of the radio axis with respect to the major axis of the host galaxy. The study was done for a representative sample of radio sources: the nearby (redshift z < 0.5) 3CRR sources, and separately for samples of giant radio sources and X-shaped radio sources. We find that radio morphological features have a dependence on the radio-optical position angle offset and on whether the source is a major- or minor-axis source. The evidence indicates an anisotropic galaxy environment, related to the ellipticity of the host galaxy, that causes the source linear size evolution, strength of backflow in the radio lobes, off-axis lobe distortions and the formation of wings and X-shaped radio sources to depend on the radio-optical position angle offset. We identify a class of X-shaped radio sources, which are either edge-darkened or lacking hotspots, and appear to have inner doubles suggesting a restarting of activity. We suggest a common formation mechanism, requiring backflows, for these apparently FR-I X-shaped radio sources as well as the edge-brightened X-shaped sources.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
