标题： 宿主和对齐效应在0.5 < z < 1的射电源中 显示英文标题

标题： Hosts and Alignment Effect in 0.5 < z < 1 radio sources

摘要： R波段和I波段图像，在主机的NOT上具有良好的视宁度，样本中的7C射电星系在z ~ 0.7（平均射电通量比3C样本暗20倍）显示出一些射电-光学对齐的证据。对该样本和来自HST档案数据的相应3C样本的对齐进行定量分析表明，较暗的射电样本中对齐通量的百分比可能较低，空间尺度也较小。对z ~ 1 3C源主机的对齐物质的研究表明，类星体延伸部分也显示出一些对齐通量，尽管其中大部分是由于光学同步辐射。 显示英文摘要

摘要： R- and I- band images with good seeing at the NOT of the hosts of a sample of 7C radio galaxies at z ~ 0.7 (with mean radio flux 20 times fainter than the 3C sample) show some evidence of radio-optical alignment. A quantitative analysis of the alignment in this sample and in a corresponding 3C sample from HST archival data indicates that the percentage of aligned flux may be lower and of smaller spatial scale in the faint radio sample. Studies of the aligned material in z ~ 1 3C source hosts indicate that the quasar extensions also show some aligned flux, though much of it is due to optical synchrotron radiation.