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arXiv 0802.4148astro-ph
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Caltech-Jodrell Bank平谱源运动学的多历元VLBI调查,部分II:运动学分析

A Multi-epoch VLBI Survey of the Kinematics of Caltech-Jodrell Bank Flat-Spectrum Sources, Part II: Analysis of the Kinematics

S. Britzen, R. C. Vermeulen, R. M. Campbell, G. B. Taylor, T. J. Pearson, A. C. S. Readhead, W. Xu, I. W. Browne, D. R. Henstock, P. Wilkinson

摘要:

内容:这是第二个一系列的论文介绍VLBI观测的293加州理工学院Jodrell银行平谱(以下简称CJF)源和他们的分析。目的:获得足够大的一致运动数据集,以研究人群的系统特性。方法:我们提出了详细的运动学分析的完整的通量密度限制的CJF调查。我们计算2-D运动学模型的基础上的最佳模型拟合参数的多历元VLBA观测。这使我们不仅可以计算径向运动,还可以计算正交运动,从而研究曲率和加速度。对所测得的运动及其可靠性进行了统计检验。推导出的视运动,光度,光谱指数和核心优势和由此产生的后果之间的相关性分析进行了说明。结果如下:在237个源中的每个源中至少有一个速度,这个样本比以前任何可用的样本都大得多,并且允许对活动星系核喷流中的视运动和与其他参数的任何可能的相关性进行有意义的统计调查。结论:活动星系核巡天为喷流和喷流成分特性的任何统计分析提供了基础。

英文摘要:

Context: This is the second of a series of papers presenting VLBI observations of the 293 Caltech-Jodrell Bank Flat-Spectrum (hereafter CJF) sources and their analysis. Aims: To obtain a consistent motion dataset large enough to allow the systematic properties of the population to be studied. Methods: We present the detailed kinematic analysis of the complete flux-density limited CJF survey. We computed 2-D kinematic models based on the optimal model-fitting parameters of multi-epoch VLBA observations. This allows us to calculate not only radial, but also orthogonal motions, and thus to study curvature and acceleration. Statistical tests of the motions measured and their reliability have been performed. A correlation analysis between the derived apparent motions, luminosities, spectral indices, and core dominance and the resulting consequences is described. Results: With at least one velocity in each of 237 sources, this sample is much larger than any available before and allows a meaningful statistical investigation of apparent motions and any possible correlations with other parameters in AGN jets. Conclusions: This AGN survey provides the basis for any statistical analysis of jet and jet-component properties.

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。

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