The Pearson-Readhead Survey of Compact Extragalactic Radio Sources from Space. II. Analysis of Source Properties
The Pearson-Readhead Survey of Compact Extragalactic Radio Sources from Space. II. Analysis of Source Properties
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DOI：
10.1086/321430
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发表时间：
2001-02
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影响因子：
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通讯作者：
M. Lister;S. Tingay;R. A. P. Jpl;Nrao;Atnf
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文献类型：
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作者：
M. Lister;S. Tingay;R. A. P. Jpl;Nrao;Atnf
我们已经进行了多维相关分析的观测特性的统计上完整的核心选择的样本的紧凑的射电大声活动星系核的数据的基础上从VLBI空间观测计划（文件I）和以前发表的研究。我们的样品是从研究的皮尔逊-Readhead（PR）调查，非常适合于调查的相对论性波束在紧凑的无线电源的一般影响。除了证实许多先前已知的相关性之外，我们还发现了几个新的趋势，为光束模型提供了额外的支持。这些趋势表明，在核心选择的样本中，最高波束源往往具有（1）高光学偏振;（2）大的秒差距-千秒差距尺度的喷流错位;（3）突出的VLBI核心组件;（4）千秒差距尺度上的单侧、核心或晕状射电形态;（5）窄发射线等效宽度;（6）射电波长的日内变化趋势强烈。我们已经使用了更高分辨率的空间和地面VLBI地图，以确认双峰的射流错位分布的PR调查，并发现对齐的秒差距和千秒差距尺度的射流源一般有弧秒尺度的无线电发射的核心两侧。对准的源还具有更宽的发射线宽度。我们发现的证据表明，在PR调查的BL蝎虎类天体都是高度光束，并具有非常相似的性质，高光学偏振类星体，除了较小的红移。聚类分析结果表明，在剔除红移影响后，各波段的样本天体的光度一般都有很好的相关性，但与其它源性质的相关性不好。
We have performed a multidimensional correlation analysis on the observed properties of a statistically complete core-selected sample of compact radio-loud active galactic nuclei based on data from the VLBI Space Observing Programme (Paper I) and previously published studies. Our sample is drawn from the well-studied Pearson-Readhead (PR) survey and is ideally suited for investigating the general effects of relativistic beaming in compact radio sources. In addition to confirming many previously known correlations, we have discovered several new trends that lend additional support to the beaming model. These trends suggest that the most highly beamed sources in core-selected samples tend to have (1) high optical polarizations; (2) large parsec- kiloparsec-scale jet misalignments; (3) prominent VLBI core components; (4) one-sided, core, or halo radio morphology on kiloparsec scales; (5) narrow emission line equivalent widths; and (6) a strong tendency for intraday variability at radio wavelengths. We have used higher resolution space and ground-based VLBI maps to confirm the bimodality of the jet misalignment distribution for the PR survey and find that the sources with aligned parsec- and kiloparsec-scale jets generally have arcsecond-scale radio emission on both sides of the core. The aligned sources also have broader emission line widths. We find evidence that the BL Lacertae objects in the PR survey are all highly beamed and have very similar properties to the high optically polarized quasars, with the exception of smaller redshifts. A cluster analysis on our data shows that after partialing out the effects of redshift, the luminosities of our sample objects in various wave bands are generally well correlated with each other but not with other source properties.