Compact steep-spectrum sources from the S4 sample
Compact steep-spectrum sources from the S4 sample
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DOI：
10.1046/j.1365-8711.2001.04017.x
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发表时间：
2000-09
影响因子：
4.8
通讯作者：
D. Saikia;S. Jeyakumar;Chris J Salter;P. Thomasson;Ralph Spencer;F. Mantovani
中科院分区：
文献类型：
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作者：
D. Saikia;S. Jeyakumar;Chris J Salter;P. Thomasson;Ralph Spencer;F. Mantovani
我们给出了从S4调查中选择的一个候选紧凑型陡谱(CSS)源样本的VLA A阵列的5 GHz观测结果。我们还估计了从不同射电光源样本中选择的高亮度CSS源的对称性参数，并将这些参数与较大的相似光度的射电光源进行比较，以了解它们的演化以及这些CSS源与射电星系和类星体的统一方案的一致性。大多数的css源很可能是通过密集的非对称环境向外推进的年轻源。发现CSS源的射电性质与统一方案一致，在统一方案中，类星体的轴在视线附近被观测，而射电星系在天空平面附近被观测。
We present the results of 5-GHz observations with the VLA A-array of a sample of candidate compact steep-spectrum (CSS) sources selected from the S4 survey. We also estimate the symmetry parameters of high-luminosity CSS sources selected from different samples of radio sources, and compare these with the larger sources of similar luminosity to understand their evolution and the consistency of the CSS sources with the unified scheme for radio galaxies and quasars. The majority of CSS sources are likely to be young sources advancing outwards through a dense asymmetric environment. The radio properties of CSS sources are found to be consistent with the unified scheme, in which the axes of the quasars are observed close to the line of sight, while radio galaxies are observed close to the plane of the sky.